From adishavit at gmail.com  Thu Aug  1 08:29:07 2013
From: adishavit at gmail.com (Adi Shavit)
Date: Thu, 1 Aug 2013 09:29:07 +0300
Subject: [Libav-user] Extracting Closed Captions
Message-ID: <CAEWUs4g+fPTduLeAD18Fu95Za_HgJxoQM+E_xRuxiFAfU2-fJQ@mail.gmail.com>

Hi,

  I was wondering if ffmpeg/libav knows how to extract closed captions from
a video (similar to ccextractor).
I am not referring to a subtitle stream but to the closed captions which
are apparently encoded within the video frames.
All similar questions I found did not seem to provide a conclusive answer.

Thanks,
Adi
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From brian at lorf.org  Thu Aug  1 19:55:40 2013
From: brian at lorf.org (Brian Lewis)
Date: Thu, 1 Aug 2013 13:55:40 -0400
Subject: [Libav-user] stubborn valgrind issue
In-Reply-To: <20130731165030.GJ1294@x>
References: <20130731081016.GH1294@x> <loom.20130731T111005-687@post.gmane.org>
	<20130731165030.GJ1294@x>
Message-ID: <20130801175540.GM1294@x>

The very same test case test.c, when compiled against libraries from
ffmpeg 2.0, doesn't produce any invalid-read or
use-of-uninitialized-memory errors in valgrind. Can someone please
confirm that this makes sense? Maybe valgrind cleanliness was not a big
concern before?

From cehoyos at ag.or.at  Thu Aug  1 20:46:45 2013
From: cehoyos at ag.or.at (Carl Eugen Hoyos)
Date: Thu, 1 Aug 2013 18:46:45 +0000 (UTC)
Subject: [Libav-user] stubborn valgrind issue
References: <20130731081016.GH1294@x> <loom.20130731T111005-687@post.gmane.org>
	<20130731165030.GJ1294@x> <20130801175540.GM1294@x>
Message-ID: <loom.20130801T204603-125@post.gmane.org>

Brian Lewis <brian at ...> writes:

> The very same test case test.c, when compiled against 
> libraries from ffmpeg 2.0, doesn't produce any 
> invalid-read or use-of-uninitialized-memory errors in 
> valgrind.

Please use git bisect to find the commit introducing 
the problem.

Carl Eugen


From cehoyos at ag.or.at  Thu Aug  1 21:00:11 2013
From: cehoyos at ag.or.at (Carl Eugen Hoyos)
Date: Thu, 1 Aug 2013 19:00:11 +0000 (UTC)
Subject: [Libav-user] Extracting Closed Captions
References: <CAEWUs4g+fPTduLeAD18Fu95Za_HgJxoQM+E_xRuxiFAfU2-fJQ@mail.gmail.com>
Message-ID: <loom.20130801T205925-662@post.gmane.org>

Adi Shavit <adishavit at ...> writes:

> I was wondering if ffmpeg/libav knows how to extract 
> closed captions from a video

No, but what kind of source file are you working with?

Carl Eugen


From adishavit at gmail.com  Fri Aug  2 08:40:52 2013
From: adishavit at gmail.com (Adi Shavit)
Date: Fri, 2 Aug 2013 09:40:52 +0300
Subject: [Libav-user] Extracting Closed Captions
In-Reply-To: <loom.20130801T205925-662@post.gmane.org>
References: <CAEWUs4g+fPTduLeAD18Fu95Za_HgJxoQM+E_xRuxiFAfU2-fJQ@mail.gmail.com>
	<loom.20130801T205925-662@post.gmane.org>
Message-ID: <CAEWUs4gERrr89SctO9KxyOzi8h21qDTRWOdBasrDPkj5fyBt4Q@mail.gmail.com>

I recorded a live TV MTP mpg.
VLC displays the captions.
Adi

On Thu, Aug 1, 2013 at 10:00 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Adi Shavit <adishavit at ...> writes:
>
> > I was wondering if ffmpeg/libav knows how to extract
> > closed captions from a video
>
> No, but what kind of source file are you working with?
>
> Carl Eugen
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
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From soho123.2012 at gmail.com  Fri Aug  2 11:38:16 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Fri, 2 Aug 2013 17:38:16 +0800
Subject: [Libav-user] ffmpeg can not post new video data to ffserver
Message-ID: <CAFd2cZWMxuu+fMAFnh=A9VJ6n6qTE9BwxWX9yo5qjnX2oqMtEw@mail.gmail.com>

Hi All,

I got the problem about ffmpeg post fail to ffserver.
I use the solution ffmpeg+ ffserver for a stream server.
the stream can work for a few minutes, then ffmpeg can not post video data
via http://localhost:8090/feed1.ffm
the command line I use for ffmpeg:
ffmpeg -loglevel debug -f video4linux2 -r 30 -s 1280x720 -input_format h264
-i /dev/video1 -vcodec
copy http://localhost:8090/feed1.ffm


ffserver can not receive new video data from ffmpeg if the stream is
running for about 30~60 minutes.
I check the errno from ffmpeg av_interleaved_write_frame()
it says "No such file or directory"
errno is 2

Does anyone have ideas?
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From ggarra13 at gmail.com  Fri Aug  2 23:26:14 2013
From: ggarra13 at gmail.com (Gonzalo Garramuno)
Date: Fri, 02 Aug 2013 18:26:14 -0300
Subject: [Libav-user] Encoding AC3
Message-ID: <51FC23F6.5020704@gmail.com>

I copied the latest docs/example muxing.c and decoding_enconding.c and 
modified it to my needs.
I am able to save a movie with synced sound if I use audio codec 
pcm_s16le and convert the float values into s16 values using 
swresample.  However, when I want to save ac3 to keep the data in float 
(fltp), the video gets created fine, but the audio comes out of sync.  
My guess is that I am not using proper pts/dts values.

From er.anshul.maheshwari at gmail.com  Sat Aug  3 05:14:34 2013
From: er.anshul.maheshwari at gmail.com (Anshul maheshwari)
Date: Sat, 3 Aug 2013 08:44:34 +0530
Subject: [Libav-user] Encoding AC3
In-Reply-To: <51FC23F6.5020704@gmail.com>
References: <51FC23F6.5020704@gmail.com>
Message-ID: <CAJMy86EWcpo34Cz97iHAdPQEG+h_bbs=n5byB4eyq2dtRsuF7Q@mail.gmail.com>

Mai
On Aug 3, 2013 2:56 AM, "Gonzalo Garramuno" <ggarra13 at gmail.com> wrote:
>
> I copied the latest docs/example muxing.c and decoding_enconding.c and
modified it to my needs.
> I am able to save a movie with synced sound if I use audio codec
pcm_s16le and convert the float values into s16 values using swresample.
 However, when I want to save ac3 to keep the data in float (fltp), the
video gets created fine, but the audio comes out of sync.  My guess is that
I am not using proper pts/dts values.
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

Hi gonzalo

Are u passing, the pts ur self.
Or they are auto generated?

Thanks
Anshul
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From er.anshul.maheshwari at gmail.com  Sat Aug  3 05:17:46 2013
From: er.anshul.maheshwari at gmail.com (Anshul maheshwari)
Date: Sat, 3 Aug 2013 08:47:46 +0530
Subject: [Libav-user] Extracting Closed Captions
In-Reply-To: <CAEWUs4gERrr89SctO9KxyOzi8h21qDTRWOdBasrDPkj5fyBt4Q@mail.gmail.com>
References: <CAEWUs4g+fPTduLeAD18Fu95Za_HgJxoQM+E_xRuxiFAfU2-fJQ@mail.gmail.com>
	<loom.20130801T205925-662@post.gmane.org>
	<CAEWUs4gERrr89SctO9KxyOzi8h21qDTRWOdBasrDPkj5fyBt4Q@mail.gmail.com>
Message-ID: <CAJMy86HfRvJdcA7NhanK1noRAYCJeBeUnYxv2j09Sdzjodnphw@mail.gmail.com>

On Aug 2, 2013 12:11 PM, "Adi Shavit" <adishavit at gmail.com> wrote:
>
> I recorded a live TV MTP mpg.
> VLC displays the captions.
> Adi
>
> On Thu, Aug 1, 2013 at 10:00 PM, Carl Eugen Hoyos <cehoyos at ag.or.at>
wrote:
>>
>> Adi Shavit <adishavit at ...> writes:
>>
>> > I was wondering if ffmpeg/libav knows how to extract
>> > closed captions from a video
>>
>> No, but what kind of source file are you working with?
>>
>> Carl Eugen
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>

Please dont top post
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From ggarra13 at gmail.com  Sat Aug  3 17:41:56 2013
From: ggarra13 at gmail.com (Gonzalo Garramuno)
Date: Sat, 03 Aug 2013 12:41:56 -0300
Subject: [Libav-user] Encoding AC3
In-Reply-To: <CAJMy86EWcpo34Cz97iHAdPQEG+h_bbs=n5byB4eyq2dtRsuF7Q@mail.gmail.com>
References: <51FC23F6.5020704@gmail.com>
	<CAJMy86EWcpo34Cz97iHAdPQEG+h_bbs=n5byB4eyq2dtRsuF7Q@mail.gmail.com>
Message-ID: <51FD24C4.4080201@gmail.com>

On 03/08/13 00:14, Anshul maheshwari wrote:
>
> Mai
> On Aug 3, 2013 2:56 AM, "Gonzalo Garramuno" <ggarra13 at gmail.com 
> <mailto:ggarra13 at gmail.com>> wrote:
> >
> > I copied the latest docs/example muxing.c and decoding_enconding.c 
> and modified it to my needs.
> > I am able to save a movie with synced sound if I use audio codec 
> pcm_s16le and convert the float values into s16 values using 
> swresample.  However, when I want to save ac3 to keep the data in 
> float (fltp), the video gets created fine, but the audio comes out of 
> sync.  My guess is that I am not using proper pts/dts values.
> > _______________________________________________
> > Libav-user mailing list
> > Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
> > http://ffmpeg.org/mailman/listinfo/libav-user
>
> Hi gonzalo
>
> Are u passing, the pts ur self.
> Or they are auto generated?
>
> Thanks
> Anshul
>
>
Sorry.  They are autogenerated.  There's a generation of pts in the 
following code (taken from the examples):

      audio_time += audio_st->pts.val * av_q2d(audio_st->time_base);


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From ggarra13 at gmail.com  Mon Aug  5 01:05:56 2013
From: ggarra13 at gmail.com (Gonzalo Garramuno)
Date: Sun, 04 Aug 2013 20:05:56 -0300
Subject: [Libav-user] Encoding AC3
In-Reply-To: <51FD24C4.4080201@gmail.com>
References: <51FC23F6.5020704@gmail.com>
	<CAJMy86EWcpo34Cz97iHAdPQEG+h_bbs=n5byB4eyq2dtRsuF7Q@mail.gmail.com>
	<51FD24C4.4080201@gmail.com>
Message-ID: <51FEDE54.2040604@gmail.com>

On 03/08/13 12:41, Gonzalo Garramuno wrote:
> Sorry.  They are autogenerated.  There's a generation of pts in the 
> following code (taken from the examples):
>
>      audio_time += audio_st->pts.val * av_q2d(audio_st->time_base);
>
>
I apologize.  The above should be:

   audio_time = audio_st->pts.val * av_q2d(audio_st->time_base);
   video_time = video_st->pts.val * av_q2d(video_st->time_base);
   while ( audio_time < video_time )
   {
      write_audio_frame(oc, audio_st, img);
      audio_time = audio_st->pts.val * av_q2d(audio_st->time_base);
    }
    write_video_frame( oc, video_st, img );

where img is the class container for audio and video.

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From pfischer at como.com  Mon Aug  5 11:09:05 2013
From: pfischer at como.com (=?utf-8?Q?Patrick_Fischer?=)
Date: Mon, 5 Aug 2013 11:09:05 +0200
Subject: [Libav-user] calc next audio pts value
Message-ID: <zarafa.51ff6bb1.3d44.4eeb64de25d2e21e@mail.como.com>

Hello

?
I would like to understand how i can calc the diff to the next PTS Value.

Im processing a dvb stream. To be in sync i detect if a frame is missing and add a dummy frame.

For video frames a can use this formula:

?
?(1/fps) * 90000 * NUMBER_OF_THE_FRAME

example:

(1 / 30) * 90000 * 1 = 3600

?
i can't find out the formula for audio pts values.

if i print out the diff to the last audio pts it is 

??? Stream #0:2[0x66](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s

diff to last pts 2880

?
If i take an other video:

??? Stream #0:1[0x1412](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 192 kb/s

diff to last pts 2160

?
Can anybody give me a hint?

?
Best Regards

Patrick

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From soho123.2012 at gmail.com  Mon Aug  5 16:17:09 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Mon, 5 Aug 2013 22:17:09 +0800
Subject: [Libav-user] VLC CANNOT play rtp stream that output by ffmpeg +
	ffserver
Message-ID: <CAFd2cZWTDqgW5amm681779CzSrWb+oXoVhFaYs8hbRBCaU6qiw@mail.gmail.com>

Hi All,


The problem is :
when  I use the command to capture video and audio:
ffmpeg -loglevel debug -debug_ts -f video4linux2 -r 30 -s 640x480
-input_format h264 -i /dev/video1 -f alsa -ar 48000 -ac 2 -i hw:0 -vcodec
copy -acodec copy  http://localhost:8090/feed1.ffm

then ffserver can service the VLC client request for live stream.

video can be displayed,
but there is no audio output because VLC says "PTS out of range"

Does anyone have idea?
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From soho123.2012 at gmail.com  Mon Aug  5 16:34:48 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Mon, 5 Aug 2013 22:34:48 +0800
Subject: [Libav-user] [HELP]capture audio question about Non-monotonous
	DTS??????
Message-ID: <CAFd2cZWY65Fhaf7KCT5aVnFWpc1iK-3zLBdykiRwpL79UhaR5w@mail.gmail.com>

HI all,

when I try to capture audio and video from USB web cam and usb sound card.
the command :
ffmpeg -loglevel debug -f video4linux2 -r 30 -s 640x480 -input_format h264
-i /dev/video1 -f alsa -ar 48000 -ac 2 -i hw:0 -vcodec copy -acodec copy
http://localhost:8090/feed1.ffm

I got the warning message from ffmpeg:

Non-monotonous DTS in output stream 0:0; previous: 254883622, current:
254883581; changing to 254883623. This may result in incorrect timestamps
in the output file


and
the VLC player can not play audio data  , but  video data can be displayed.

Does anyone have idea and the timestamp ?
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From soho123.2012 at gmail.com  Mon Aug  5 19:13:49 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Tue, 6 Aug 2013 01:13:49 +0800
Subject: [Libav-user] [HELP]how to avoid "ALSA buffer xrun."
Message-ID: <CAFd2cZXxzZ-qj4fiKUDOgVXc_Sswzn87XKj=E=aL9P8ZuYPtKw@mail.gmail.com>

Hi All,


When I use ffmpeg to capture video and sound (USB device), I can see the
message from alsa-audio-common.c "ALSA buffer xrun."

the command line I use :

ffmpeg -loglevel debug -f video4linux2 -r 30 -s 640x480 -input_format h264
-i /dev/video1 -f alsa -ar 48000 -ac 2 -i hw:0 -vcodec copy -acodec copy
http://localhost:8090/feed1.ffm


In record case, it seems ffmpeg get audio slower than usb device capture
the sound, such that the buffer overflow, right?
Does anyone have idea how to avoid the issue about "ALSA buffer xrun" when
ffmpeg capture sound from usb sound card?


thanks!
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From nsugino at 3way.com.ar  Tue Aug  6 12:58:09 2013
From: nsugino at 3way.com.ar (Nicolas Sugino)
Date: Tue, 6 Aug 2013 07:58:09 -0300
Subject: [Libav-user] calc next audio pts value
In-Reply-To: <zarafa.51ff6bb1.3d44.4eeb64de25d2e21e@mail.como.com>
References: <zarafa.51ff6bb1.3d44.4eeb64de25d2e21e@mail.como.com>
Message-ID: <CAO+cNvfAVR-0nPyo-zbAp+zUhaQuYWCqPKpaNZWK0i2LQw=rwg@mail.gmail.com>

2013/8/5 Patrick Fischer <pfischer at como.com>

> **
>
> Hello
>
>
>
> I would like to understand how i can calc the diff to the next PTS Value.
>
> Im processing a dvb stream. To be in sync i detect if a frame is missing
> and add a dummy frame.
>
> For video frames a can use this formula:
>
>
>
>  (1/fps) * 90000 * NUMBER_OF_THE_FRAME
>
> example:
>
> (1 / 30) * 90000 * 1 = 3600
>
>
>
> i can't find out the formula for audio pts values.
>
> if i print out the diff to the last audio pts it is
>
>     Stream #0:2[0x66](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz,
> stereo, s16p, 256 kb/s
>
> diff to last pts 2880
>
>
>
> If i take an other video:
>
>     Stream #0:1[0x1412](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000
> Hz, stereo, s16p, 192 kb/s
>
> diff to last pts 2160
>
>
>
> Can anybody give me a hint?
>
>
>
> Best Regards
>
> Patrick
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
Hi

I've been using the following:

being:
AVCodecContext *cc;
AVStream *st;

then:
(cc->frame_size / cc->sample_rate) * (st->time_base.den /
st->time_base.num) * number

I first multiply everything and then do the divisions for rounding reasons.

Also, that 90000 you put in the first formula would be the stream
(time_base.den / stream time_base.num), it may not be always 90000.

I don't know if this is the right way, but this way seemed to work for me.
If someone knows better please add further info or correct this

Regards
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From aworldgonewrong at gmail.com  Wed Aug  7 10:53:25 2013
From: aworldgonewrong at gmail.com (John Freeman)
Date: Wed, 7 Aug 2013 09:53:25 +0100
Subject: [Libav-user] RTP Extended headers
Message-ID: <CAARJWsGbwX2SoVk-1DwC+Y+p4TWwhburHR=vT4dmDyUNLu+j_Q@mail.gmail.com>

I notice that in
rtp_parse_packet_internal<https://www.ffmpeg.org/doxygen/trunk/rtpdec_8c.html#ade7ff7ecc38e5b5429405db7447e9c20>
(rtpdec.c)
the extended headers in RTP packets are ignored. I am trying to find a way
of accessing these extended headers, as the stream I am using contains
important data in these headers.

Is there any way without delving into private data, that I can get access
to the raw RTP data before demuxing?

I am currently ripping apart the priv_data pointer in AVFormatContext to
get to the data, but this approach is too hacky for me and potentially
dangerous

~ Jay
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From adishavit at gmail.com  Wed Aug  7 16:32:12 2013
From: adishavit at gmail.com (Adi Shavit)
Date: Wed, 7 Aug 2013 17:32:12 +0300
Subject: [Libav-user] Reducing the Frame-Rate of a Network Video Stream
In-Reply-To: <CADiKgoiyDHLsp7W6gCKXg-JFw1AGnhr5cK6hyUDeAb+P1d7-xg@mail.gmail.com>
References: <CAEWUs4j0B+Zp+bhW24XR4ZUoP+-696MF4iamreEHSgQHitvccw@mail.gmail.com>
	<CADiKgoiDH_+hyDwy-U6R-iOf7hbSuMgUsBTSVy6uoTP41y0RdA@mail.gmail.com>
	<CAEWUs4go6Yqv8REQyiHnNjLqR=KuL0BunkJP4woiXtFFccSfLw@mail.gmail.com>
	<CADiKgojZat_fAb8HEts08Wpc-QSe6F=VHtHWEaxY+O7q5NZWOw@mail.gmail.com>
	<CAEWUs4gVQ2BwwwvUkXTbxEiBU9pUCxOcaJLfrMWwfxW4WVTzHA@mail.gmail.com>
	<1375172003820-4658293.post@n4.nabble.com>
	<CAEWUs4iirCw62ObADXcKOhXTFAGwKMDJhFck4sfaKA3aQJvt+g@mail.gmail.com>
	<CADiKgoiyDHLsp7W6gCKXg-JFw1AGnhr5cK6hyUDeAb+P1d7-xg@mail.gmail.com>
Message-ID: <CAEWUs4g9JTdTwurT0+5Q_xJOianVGxLuuHOTgRCc2JNFPBG2BA@mail.gmail.com>

Hi,

  I have some questions about extracting the time stamps:

1. Given a packet, I have AVPacket.pts and also AVFrame.pts and
AVFrame.pkt_pts.
I noticed that every few frames (about 1 in 3) AVPacket.pts is different
from AVFrame.pts and AVFrame.pkt_pts - after avcodec_decode_video2().

Which one should I be using to do fps dropping?

How do I access the correct timestamp (is there a function instead of
direct access?) and how do I measure the difference in msec?

Thanks,
Adi



On Tue, Jul 30, 2013 at 1:34 PM, Alex Cohn <alexcohn at netvision.net.il>wrote:

> On Tue, Jul 30, 2013 at 12:35 PM, Adi Shavit <adishavit at gmail.com> wrote:
> > Hi Mike,
> >
> >
> > On Tue, Jul 30, 2013 at 11:13 AM, mikeversteeg <mike at mikeversteeg.com>
> wrote:
> >> Check the PTS of each frame and use that to decide whether to throw it
> out or
> >> not.
> >
> > Ah, thanks.
> > These will give me the play-timestamps, right?
> >
> >> That way there is no need to decode frames you won't be using.
> > Do you mean, no need to PROCESS, not decode.
> > Don't I have to decode all frames?
> > If I could not-decode (via the decoder) some of the frames that would
> > be great and further save cpu. Can I do that, just skip some encoded
> > frames? Wouldn't that mess up the following frames?
> >
> > Thanks,
> > Adi
>
> You must decode all frames, or skip to the next IDR frame, if you want
> to avoid artiifacts. Yes PTS is play timestamp. The units may depend
> on your stream format, and are generally expressed in terms of the
> timebase.
>
> BR,
> Alex Cohn
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
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From nisar.med at gmail.com  Wed Aug  7 19:19:26 2013
From: nisar.med at gmail.com (Nisar Ahmed)
Date: Wed, 7 Aug 2013 22:19:26 +0500
Subject: [Libav-user] writing h.264 raw frames to mp4 movie
Message-ID: <CAL1+ejhs==Af9a=-ETmPnvvDZ_jt4fEOFmOqfhA2tVxn6EKt0g@mail.gmail.com>

Dear list,

I am writing my first libav program and facing problem in muxing h.264 raw
frames to mp4.

I referred to muxing.c sample but that sample encodes frames to h.264
before writing to file however in my case I dont have to encoding, the
frames are already compressed.

I need to know the what steps do I need to follow in order to create
correct mp4 movie

currently I am doing the following

AVOutputFormat* outputFormat
AVFormatContext* formatContext
char* filename = "c:\\export.mp4";

outputFormat = av_guess_format(NULL, filename, NULL);
formatContext = avformat_alloc_context();
AVCodec* codec = avcodec_find_encoder(outputFormat->video_codec);
AVStream* st = avformat_new_stream(formatContext , codec);

c = st->codec;
c->bit_rate = 400000;
c->width    = 720;
c->height   = 480;
c->time_base.den = 2997;
c->time_base.num = 100;
c->gop_size      = 12; /* emit one intra frame every twelve frames at most
*/
c->pix_fmt       = AV_PIX_FMT_YUV420P;

av_dump_format(formatContext, 0, filename, 1);

if (!(outputFormat->flags & AVFMT_NOFILE)) {
    if (avio_open(&formatContext->pb, filename, AVIO_FLAG_WRITE) < 0) {
        return 1;
    }
}

/* Write the stream header, if any. */
avformat_write_header(formatContext, NULL);

The following code writes the data in another callback function having data
and dataLen as parameters.. data is the pointer to h.264 frame data and
dataLen is the length in bytes
AVPacket pkt = { 0 };
av_init_packet(&pkt);
pkt.stream_index = 0;
pkt.flags = 0;
pkt.pts = videoFrameNumber;
pkt.dts = videoFrameNumber;
pkt.size = dataLen;
pkt.data = data;
av_interleaved_write_frame(formatContext, &pkt);
videoFrameNumber += 100;

and finally

av_write_trailer(formatContext);
int i = 0;
for (i = 0; i < formatContext->nb_streams; i++)
    {
        av_freep(&formatContext->streams[i]->codec);
        av_freep(&formatContext->streams[i]);
    }

if (!(formatContext->oformat->flags & AVFMT_NOFILE))
{
        avio_close(formatContext->pb);
}

av_free(formatContext);


The movie is created but when I run
ffmpeg -i c:\output.mp4 the following error

Could not find codec parameters for stream 0 (Video: h264 (avc1 /
0x31637661), 720x480, 318244 kb/s): unspecified pixel format


Please help!
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From yaiba243 at gmail.com  Thu Aug  8 02:11:23 2013
From: yaiba243 at gmail.com (Phu Nguyen Anh)
Date: Thu, 8 Aug 2013 07:11:23 +0700
Subject: [Libav-user] Encoding & muxing to m4a problem
Message-ID: <6F199C062DE648F191B11216DD08326C@gmail.com>

Hi there, 
I'm a newbie to libav and now having trouble encoding & mux a sound sample array to m4a file. The process done without any problem, but output file is not hearable and the size is very small, e.g. I have around 88000 sound samples but output file size is only around 1.8KB.
My code below is mostly base on decoding_encoding.c & muxing.c samples from ffmpeg, but no pts, dts parts are set as I donot understand how to set them for audio encoding yet. Maybe problem comes from that?
Please help.

~~~~~
avcodec_register_all();
av_register_all();

codec = avcodec_find_encoder(CODEC_ID_AAC);
c = avcodec_alloc_context3(codec);
c->bit_rate = 64000;
c->sample_fmt = AV_SAMPLE_FMT_FLTP;
c->sample_rate = rate;
c->channel_layout = AV_CH_LAYOUT_MONO;
c->channels = 1;
c->strict_std_compliance = FF_COMPLIANCE_EXPERIMENTAL;

// Open it
avcodec_open2(c, codec, NULL) < 0);

frame = avcodec_alloc_frame();
frame->nb_samples     = c->frame_size;
frame->format         = c->sample_fmt;
frame->channel_layout = c->channel_layout;

buffer_size = av_samples_get_buffer_size(NULL, c->channels, c->frame_size,
                                         c->sample_fmt, 0);
samples = (uint16_t *)av_malloc(buffer_size);

// setup the data pointers in the AVFrame
avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
                               (const uint8_t*)samples, buffer_size, 0);


// allocate the output media context
avformat_alloc_output_context2(&oc, NULL, NULL, filename);
ofmt = oc->oformat;
audio_st = avformat_new_stream(oc, NULL);
audio_st->codec = c;
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
    c->flags |= CODEC_FLAG_GLOBAL_HEADER;

// open the output file
if (!(ofmt->flags & AVFMT_NOFILE)) {
    avio_open(&oc->pb, filename, AVIO_FLAG_WRITE);
}
ret = avformat_write_header(oc, NULL);

// captureBuffer is a sound buffer captured with parameters: mono, 16bit/sample, sample rate = 22050
captureBufPtr = captureBuffer;
samplesLeft = samplesCaptured;
samplesToCopy = 0;
if (frame) {
    frame->pts = 0;
}
// Encoding loop
for (;samplesLeft > 0;) {
    av_init_packet(&pkt);
    pkt.data = NULL; // packet data will be allocated by the encoder
    pkt.size = 0;

    samplesToCopy = samplesLeft >= frame->nb_samples? frame->nb_samples : samplesLeft;
    memcpy(samples, captureBufPtr, samplesToCopy * 2);
    captureBufPtr += samplesToCopy * 2;
    samplesLeft -= samplesToCopy;

    ret = avcodec_encode_audio2(c, &pkt, frame, &got_output);
    ret = av_interleaved_write_frame(oc, &pkt);
av_free_packet(&pkt);

}

// Get delayed frame
for (got_output = 1; got_output;) {
    ret = avcodec_encode_audio2(c, &pkt, NULL, &got_output);
    if (got_output) {
    ret = av_interleaved_write_frame(oc, &pkt);
av_free_packet(&pkt);
    }
}

if (oc) {
av_write_trailer(oc);
}


~~~~~


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From bersac_1 at hotmail.fr  Thu Aug  8 16:18:34 2013
From: bersac_1 at hotmail.fr (asqz)
Date: Thu, 8 Aug 2013 07:18:34 -0700 (PDT)
Subject: [Libav-user] Circular buffer overrun while not reading udp stream
Message-ID: <1375971514605-4658354.post@n4.nabble.com>

Hi,

I am reading an udp stream with the function av_read_frame. While I am
constantly doing it, my program doesn't have any problem. The problem occur
when I stop reading it for a while, and then reading it again. After a while
not reading the udp stream, this error message pop :
*Circular buffer overrun. To avoid, increase fifo_size URL option. To
survive in such case, use overrun_nonfatal option
*
When I resume the stream reading, it read successfully read some packet and
then display error :
* slice end not reached but screenspace end (3 left 000000, score= -352)*
After this av_read_frame return the value -5 and my program cam't read
successfully any packet.

It seems like I have to stop some buffer to be filled by the udp stream. I
tried the function av_read_pause without success.

Can you help me fix this problem please ?





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From kalileo at universalx.net  Fri Aug  9 08:44:07 2013
From: kalileo at universalx.net (Kalileo)
Date: Fri, 9 Aug 2013 13:44:07 +0700
Subject: [Libav-user] Circular buffer overrun while not reading udp
	stream
In-Reply-To: <1375971514605-4658354.post@n4.nabble.com>
References: <1375971514605-4658354.post@n4.nabble.com>
Message-ID: <C4A4A977-D18A-4E5B-8079-F539961DD089@universalx.net>


On Aug 8, 2013, at 21:18 , asqz wrote:

> ...
> It seems like I have to stop some buffer to be filled by the udp stream. I
> tried the function av_read_pause without success.
> 
> Can you help me fix this problem please ?
> 

How about closing the stream and reopen when you're ready to read again?




From battistel at gmail.com  Fri Aug  9 12:55:25 2013
From: battistel at gmail.com (Massimo Battistel)
Date: Fri, 9 Aug 2013 12:55:25 +0200
Subject: [Libav-user]  AVFilter proper configuration
Message-ID: <CAHss8oFbDkSr8AvRAk7X9j23doMLiwkGEb5zRh7o42ZOA39yyw@mail.gmail.com>

Hello,
regarding the following example:

http://ffmpeg.org/doxygen/trunk/doc_2examples_2filtering_video_8c-example.html

I cannot make it work with "fps=fps=25" filter. I get non monotone pts.
Do I have to modify something on "Init_Filters"?

thanks
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From bersac_1 at hotmail.fr  Fri Aug  9 13:40:03 2013
From: bersac_1 at hotmail.fr (asqz)
Date: Fri, 9 Aug 2013 04:40:03 -0700 (PDT)
Subject: [Libav-user] Circular buffer overrun while not reading udp
	stream
In-Reply-To: <C4A4A977-D18A-4E5B-8079-F539961DD089@universalx.net>
References: <1375971514605-4658354.post@n4.nabble.com>
	<C4A4A977-D18A-4E5B-8079-F539961DD089@universalx.net>
Message-ID: <DUB116-W78A4EB260146A8210B7D17D0580@phx.gbl>

>>How about closing the stream and reopen when you're ready to read again? 
I tried and it worked. I close the AVFormatContext and reopen it, but it take something like 4 seconds. Another way to restart successfully could be to clean the beffer before resuming reading. Is there a way to do that ?

Moroever the error : Circular buffer overrun. To avoid, increase fifo_size URL option. To survive in such case, use overrun_nonfatal optionIs still displayed. Do you know how to get rid of this error ?
Cordially,Guillaume Bersac 		 	   		  



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From martijnvdc at gmail.com  Sat Aug 10 01:57:13 2013
From: martijnvdc at gmail.com (Martijn Vandecasteele)
Date: Sat, 10 Aug 2013 01:57:13 +0200
Subject: [Libav-user] Dynamically changing the target bitrate for VP8 and
	Opus
Message-ID: <CAKsQZtWHr_p_O_kGLGyOr58ZZ-q8bJApcTH-9PgZPeaf6ieVOw@mail.gmail.com>

Hello,
I am trying to implement an audio and video stream over a network. However,
i need to change the bitrate during encoding, to adapt to the connection's
bandwidth.
I tried changing the bit_rate variable of the codec context, which did not
seem to do anything. I assume this variable is only used during codec
initiation?
I also tried changing the crf value for VP8 using av_opt_set_double, but it
also had no effect.

Is there a way to control the bitrate without re-initialising the codec
every time i need a different bitrate?
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From nicolas.george at normalesup.org  Sat Aug 10 13:00:41 2013
From: nicolas.george at normalesup.org (Nicolas George)
Date: Sat, 10 Aug 2013 13:00:41 +0200
Subject: [Libav-user] What exactly is AVFilterPad and AVFilterInOut
	within libavfilter?
In-Reply-To: <1375218256232-4658321.post@n4.nabble.com>
References: <1375218256232-4658321.post@n4.nabble.com>
Message-ID: <20130810110041.GH9838@phare.normalesup.org>

Le duodi 12 thermidor, an CCXXI, sunswang a ?crit?:
> I am currently trying to figure out how to resolve the "output pad .... no
> source found" error from a modification of the ffmpeg audio filter example
> because I am using a filter that requires 2 or more inputs.

Please do not trim error messages.

> However, I am having trouble understanding exactly what "AVFilterPad",

AVFilterPad is used to describe an input or output of a filter: its type,
its name, pointers to functions used to handle incoming or outgoing frames
and a few more technical details. It is part of the filter.

> "AVFilterInOut" are in playing a roll towards filtering.

AVFilterInOut is mostly a way of encoding the information "the 4th input of
the concat filter": a pointer to the filter context, and the index of the
designated input or output. Plus a next pointer to build a linked list, and
possibly a name if the structure comes from parsing a graph description.

For example, if you parse a graph that says "[0:a] [ex] amerge", you get
two AVFilterInOut for the input:
- one pointing to the context for amerge, index #0, name "0:a";
- one pointing to the context for amerge, index #1, name "ex";
and one AVFilterInOut for the output:
- pointing to the context for amerge, index #0 (it has only one output),
  name NULL.

Regards,

-- 
  Nicolas George
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From lucas.soltic at orange.fr  Sat Aug 10 16:11:59 2013
From: lucas.soltic at orange.fr (Lucas Soltic)
Date: Sat, 10 Aug 2013 16:11:59 +0200
Subject: [Libav-user] About audio decoding
Message-ID: <F2C04187-378C-445F-8909-5A9191B9B21C@orange.fr>

Hello,

Until now, I was using avcodec_audio_decode3(). But as I moved on to FFmpeg 2.0, I got issues with some decoders that indicated I should move on to avcodec_audio_decode4(). So that's what I am doing at the moment.

However, there is one part of the audio decode example that I do not understand:
if (avpkt.size < AUDIO_REFILL_THRESH) {
    /* Refill the input buffer, to avoid trying to decode
     * incomplete frames. Instead of this, one could also use
     * a parser, or use a proper container format through
     * libavformat. */
    memmove(inbuf, avpkt.data, avpkt.size);
    avpkt.data = inbuf;
    len = fread(avpkt.data + avpkt.size, 1,
                AUDIO_INBUF_SIZE - avpkt.size, f);
    if (len > 0)
        avpkt.size += len;
}

Does that mean that AVPacket can contain incomplete frames? I would have expected an AVPacket to contain one or several frames, but not incomplete ones?

I also do not understand what the 'parser' and 'proper container format' solutions would be.

Regards,
Lucas
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From nicolas.george at normalesup.org  Sat Aug 10 16:32:14 2013
From: nicolas.george at normalesup.org (Nicolas George)
Date: Sat, 10 Aug 2013 16:32:14 +0200
Subject: [Libav-user] About audio decoding
In-Reply-To: <F2C04187-378C-445F-8909-5A9191B9B21C@orange.fr>
References: <F2C04187-378C-445F-8909-5A9191B9B21C@orange.fr>
Message-ID: <20130810143214.GA31924@phare.normalesup.org>

Le tridi 23 thermidor, an CCXXI, Lucas Soltic a ?crit?:
> Hello,
> However, there is one part of the audio decode example that I do not
> understand:
> if (avpkt.size < AUDIO_REFILL_THRESH) {
>     /* Refill the input buffer, to avoid trying to decode
>      * incomplete frames. Instead of this, one could also use
>      * a parser, or use a proper container format through
>      * libavformat. */
>     memmove(inbuf, avpkt.data, avpkt.size);
>     avpkt.data = inbuf;
>     len = fread(avpkt.data + avpkt.size, 1,
>                 AUDIO_INBUF_SIZE - avpkt.size, f);
>     if (len > 0)
>         avpkt.size += len;
> }
> 
> Does that mean that AVPacket can contain incomplete frames? I would have
> expected an AVPacket to contain one or several frames, but not incomplete
> ones?

Depends on what "can" you mean exactly.

If you read a file using libavformat, the packets it returns are supposed to
always contain exactly one frame, and never incomplete ones. In that sense,
a packet can not contain incomplete frames.

But if you give a packet with incomplete frames to libavcodec, it will
decode what can be decoded, return the number of bytes consumed and properly
leave the incomplete frame for later. In that sense, a packet can contain
incomplete frames.

> I also do not understand what the 'parser' and 'proper container format'
> solutions would be.

Look at what the code in the example does: it uses stdio to read directly
from a MP2 file. A proper container format is a file format designed to
store various streams in various codecs, such as Matroska, Ogg, NUT, MP4,
AVI, etc. The format has generic data structures to delimit packets and
store timestamps. That is the best way of storing audio-video content.

Some formats are just the packets concatenated together, without any header
or delimiter. It is called an elementary stream, and does not work with all
codecs. For example, it works with most MPEG codecs, but usually not with
the Vorbis codecs. A parser is a stripped-down decoder that is used to find
packet boundaries and various additional information in an elementary
stream; libavformat uses them for you whenever necessary.

Regards,

-- 
  Nicolas George
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From lucas.soltic at orange.fr  Sat Aug 10 17:40:47 2013
From: lucas.soltic at orange.fr (Lucas Soltic)
Date: Sat, 10 Aug 2013 17:40:47 +0200
Subject: [Libav-user] About audio decoding
In-Reply-To: <20130810143214.GA31924@phare.normalesup.org>
References: <F2C04187-378C-445F-8909-5A9191B9B21C@orange.fr>
	<20130810143214.GA31924@phare.normalesup.org>
Message-ID: <8ACDF01C-5B50-4DEB-8CFB-3DE9EF57AFC0@orange.fr>

Le 10 ao?t 2013 ? 16:32, Nicolas George <nicolas.george at normalesup.org> a ?crit :

> Le tridi 23 thermidor, an CCXXI, Lucas Soltic a ?crit :
>> Hello,
>> However, there is one part of the audio decode example that I do not
>> understand:
>> if (avpkt.size < AUDIO_REFILL_THRESH) {
>>    /* Refill the input buffer, to avoid trying to decode
>>     * incomplete frames. Instead of this, one could also use
>>     * a parser, or use a proper container format through
>>     * libavformat. */
>>    memmove(inbuf, avpkt.data, avpkt.size);
>>    avpkt.data = inbuf;
>>    len = fread(avpkt.data + avpkt.size, 1,
>>                AUDIO_INBUF_SIZE - avpkt.size, f);
>>    if (len > 0)
>>        avpkt.size += len;
>> }
>> 
>> Does that mean that AVPacket can contain incomplete frames? I would have
>> expected an AVPacket to contain one or several frames, but not incomplete
>> ones?
> 
> Depends on what "can" you mean exactly.
> 
> If you read a file using libavformat, the packets it returns are supposed to
> always contain exactly one frame, and never incomplete ones. In that sense,
> a packet can not contain incomplete frames.
> 
> But if you give a packet with incomplete frames to libavcodec, it will
> decode what can be decoded, return the number of bytes consumed and properly
> leave the incomplete frame for later. In that sense, a packet can contain
> incomplete frames.

So if all of my packets are created through av_malloc(sizeof(AVPacket)) + av_init_packet() + av_read_frame(), I will always get one and only one frame (may it be valid or not) per packet? Thus I don't have to care of the above piece of code. Am I right?

By the way.. I just noticed that av_read_frame()'s documentation states the following: It will split what is stored in the file into frames and return one for each call.

So it seems like I'm right...

>> I also do not understand what the 'parser' and 'proper container format'
>> solutions would be.
> 
> Look at what the code in the example does: it uses stdio to read directly
> from a MP2 file. A proper container format is a file format designed to
> store various streams in various codecs, such as Matroska, Ogg, NUT, MP4,
> AVI, etc. The format has generic data structures to delimit packets and
> store timestamps. That is the best way of storing audio-video content.
> 
> Some formats are just the packets concatenated together, without any header
> or delimiter. It is called an elementary stream, and does not work with all
> codecs. For example, it works with most MPEG codecs, but usually not with
> the Vorbis codecs. A parser is a stripped-down decoder that is used to find
> packet boundaries and various additional information in an elementary
> stream; libavformat uses them for you whenever necessary.

Hmm ok I understand now :), many thanks for the explanation!

> 
> Regards,
> 
> -- 
>  Nicolas George
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user


From battistel at gmail.com  Sat Aug 10 18:26:51 2013
From: battistel at gmail.com (Massimo Battistel)
Date: Sat, 10 Aug 2013 18:26:51 +0200
Subject: [Libav-user] AVFilter proper configuration
In-Reply-To: <CAHss8oFbDkSr8AvRAk7X9j23doMLiwkGEb5zRh7o42ZOA39yyw@mail.gmail.com>
References: <CAHss8oFbDkSr8AvRAk7X9j23doMLiwkGEb5zRh7o42ZOA39yyw@mail.gmail.com>
Message-ID: <CAHss8oGq_p6OScciDRrWS3Z0=z8CUW4i9Hy4AFRGiHRxs=8PUg@mail.gmail.com>

I found what was wrong.
On "InitFilters" function, when setting args (char args[512]), I had to use
stream timebase (AVStream) and not codec timebase (AVCodecContext). I don't
know if this can be considered a bug.

Second thing, fps filter do not modify frame->pts. Is it correct?

thanks


2013/8/9 Massimo Battistel <battistel at gmail.com>

> Hello,
> regarding the following example:
>
>
> http://ffmpeg.org/doxygen/trunk/doc_2examples_2filtering_video_8c-example.html
>
> I cannot make it work with "fps=fps=25" filter. I get non monotone pts.
> Do I have to modify something on "Init_Filters"?
>
> thanks
>
>


-- 
Massimo Battistel.
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From yousef.alhashemi at gmail.com  Mon Aug 12 00:09:04 2013
From: yousef.alhashemi at gmail.com (Yousef Alhashemi)
Date: Mon, 12 Aug 2013 01:09:04 +0300
Subject: [Libav-user] using ffmpeg libraries to split a video
Message-ID: <CAGuXfB9HQPfzHLWf2muv+J5XGdXaeMcYmU9WT+a3iWzgxc2QcA@mail.gmail.com>

Hi,

I asked a question on the ffmpeg support forum (ffmpeg.gusari.org) and
someone pointed me to this list, so I'm repeating my question here:

I would like to use ffmpeg libraries to split a video into equal-sized
chunks of smaller files. For example, let's say I have a 100MB video that
I'd like to split into 10 10MB videos using the same audio/video codec and
container format. On the command-line, it would be something like this
(assuming 10MB of data = 10 seconds of video): ffmpeg -i input.file -ss
"00:00:00" -t "00:00:10" -vcodec copy -acodec copy output.file (and repeat
the same for the remaining 9 chunks)

My question is, what are the actual ffmpeg library calls that do the
equivalent of this command? I can dig in the code and find out myself but
that would take me a lot of time because I'm not familiar with the (large)
code base of ffmpeg. I would appreciate any help from ffmpeg developers; I
imagine this is easy to answer.

Thanks,
Yousef
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From jyavenard at gmail.com  Mon Aug 12 05:36:56 2013
From: jyavenard at gmail.com (Jean-Yves Avenard)
Date: Mon, 12 Aug 2013 13:36:56 +1000
Subject: [Libav-user] what is "fltp" for audio when using ffmpeg
In-Reply-To: <CAFd2cZU=eK8-fVVK9rWJBdU9L5Z_Zuch+a++_rpvAeMmhsYTPg@mail.gmail.com>
References: <CAFd2cZU=eK8-fVVK9rWJBdU9L5Z_Zuch+a++_rpvAeMmhsYTPg@mail.gmail.com>
Message-ID: <CANpj82J0gd2+LnmYtKMqcFyURGMds-3Ofd_bJYxtBkdLgba4FQ@mail.gmail.com>

On 31 July 2013 17:43, Soho Soho123 <soho123.2012 at gmail.com> wrote:
> Hi All,
>
>
> I got the problem when I try to capture audio + video from USB web cam by
> ffmepg.
> the problem is audio can not play when I use VLC to play the stream that
> ffserver output.
> the question is :
> I use ffmepg the encode audio to "wmav1" but, I can see the log that is
> output by audio filter.
> the audio format is "fltp".
> What is "fltp"? Does anyone have idea?

32 bits floats, planar (as opposed in interleaved)

From aworldgonewrong at gmail.com  Mon Aug 12 10:14:06 2013
From: aworldgonewrong at gmail.com (John Freeman)
Date: Mon, 12 Aug 2013 09:14:06 +0100
Subject: [Libav-user] Scale in RTSP
Message-ID: <CAARJWsG7TwEiDgqO6qXLB2W+J2rDU0OVASntzK2OpWanp24G3g@mail.gmail.com>

Why doesn't libav support scale in the RTSP PLAY command? The RTSP RFC
defines the usage in section 12.34.

I really need to use scale in my application without changing the libav
source code.
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From yellowy4321 at gmail.com  Mon Aug 12 23:20:25 2013
From: yellowy4321 at gmail.com (sunswang)
Date: Mon, 12 Aug 2013 14:20:25 -0700 (PDT)
Subject: [Libav-user] What exactly is AVFilterPad and AVFilterInOut
 within libavfilter?
In-Reply-To: <20130810110041.GH9838@phare.normalesup.org>
References: <1375218256232-4658321.post@n4.nabble.com>
	<20130810110041.GH9838@phare.normalesup.org>
Message-ID: <1376342425769-4658367.post@n4.nabble.com>

Thanks Nicolas George

That matches what I previously concluded in my adventures in the FFMPEG
source code.

For people who are developing with AVFilter this, I recommend taking a look
at avfilter_graph_parse2 instead of doing avfilter_graph_parse_ptr, parse2
will setup most of the inputs and outputs for you so you don't have to
manually set it up like those provided in the official examples

Mike



--
View this message in context: http://libav-users.943685.n4.nabble.com/What-exactly-is-AVFilterPad-and-AVFilterInOut-within-libavfilter-tp4658321p4658367.html
Sent from the libav-users mailing list archive at Nabble.com.

From andrey2067 at gmail.com  Tue Aug 13 10:38:48 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Tue, 13 Aug 2013 11:38:48 +0300
Subject: [Libav-user] HLS options problem
Message-ID: <CACg7hcsbkut8xS75KRMQ2cqX-F8cS-9GDFH1FWmN9wpGfmngeg@mail.gmail.com>

Hi gentlemen,

We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
We are trying to write a simple HLS code example based on muxing.c standard
one.
Let be two input streams, video and audio (they can be synthetic, doesn't
matter).
Our purpose is to mux them into M3U8 playlist using HLS.
Suppose, duration of every TS segment file be 3 sec, and the desirable
maximum number of entries in M3U8 output file be 100.
>From the FFmpeg application sources, one can see that the Apple HTTP Live
Streaming segmenter implemented in hlsenc.c file.
And the relevant options there are, as well: "hls_list_size", "hls_time",
etc.
The problem is that we have not succeeded to set/get/find these options in
a conventional way, as shown in the following code:

// Here is a part of main() program
int64_t i1 = 0;
void *target_obj;
AVFormatContext *ofmt_ctx = NULL;
AVOutputFormat *ofmt = NULL;

avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, "Example_Out.m3u8");
ofmt = ofmt_ctx->oformat;

// The relevant options ("hls_list_size", "hls_time") are located under
ofmt->priv_class->option.
// But AVClass *priv_class is not the first member of the AVOutputFormat.
// So, due to the documentation, av_opt_find...(), av_opt_get...() and
av_opt_set...()
// cannot be used for options within AVOutputFormat.
// In practice, any of the following three lines causes exception.
const AVOption *o = av_opt_find2(ofmt, "segment_list_size", NULL,
0,  AV_OPT_SEARCH_CHILDREN, &target_obj);
av_opt_get_int(ofmt, "segment_list_size", AV_OPT_SEARCH_CHILDREN, &i1);
av_opt_set_int(ofmt, "segment_list_size", 10, AV_OPT_SEARCH_CHILDREN);

Our question: If there is a way to overcome the problem, i.e. to
set/get/find options for AVOutputFormat, like for AVCodecContext (for
example)?

Thank you,
Andrey Mochenov.
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From onemda at gmail.com  Tue Aug 13 14:40:11 2013
From: onemda at gmail.com (Paul B Mahol)
Date: Tue, 13 Aug 2013 12:40:11 +0000
Subject: [Libav-user] HLS options problem
In-Reply-To: <CACg7hcsbkut8xS75KRMQ2cqX-F8cS-9GDFH1FWmN9wpGfmngeg@mail.gmail.com>
References: <CACg7hcsbkut8xS75KRMQ2cqX-F8cS-9GDFH1FWmN9wpGfmngeg@mail.gmail.com>
Message-ID: <CAPYw7P6QtPJ8PWAdOZQxYSrouwjgE7M-3ZfiiDRcnhHFhQV2NQ@mail.gmail.com>

On 8/13/13, Andrey Mochenov <andrey2067 at gmail.com> wrote:
> Hi gentlemen,
>
> We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> We are trying to write a simple HLS code example based on muxing.c standard
> one.
> Let be two input streams, video and audio (they can be synthetic, doesn't
> matter).
> Our purpose is to mux them into M3U8 playlist using HLS.
> Suppose, duration of every TS segment file be 3 sec, and the desirable
> maximum number of entries in M3U8 output file be 100.
> From the FFmpeg application sources, one can see that the Apple HTTP Live
> Streaming segmenter implemented in hlsenc.c file.
> And the relevant options there are, as well: "hls_list_size", "hls_time",
> etc.
> The problem is that we have not succeeded to set/get/find these options in
> a conventional way, as shown in the following code:
>
> // Here is a part of main() program
> int64_t i1 = 0;
> void *target_obj;
> AVFormatContext *ofmt_ctx = NULL;
> AVOutputFormat *ofmt = NULL;
>
> avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, "Example_Out.m3u8");
> ofmt = ofmt_ctx->oformat;
>
> // The relevant options ("hls_list_size", "hls_time") are located under
> ofmt->priv_class->option.
> // But AVClass *priv_class is not the first member of the AVOutputFormat.
> // So, due to the documentation, av_opt_find...(), av_opt_get...() and
> av_opt_set...()
> // cannot be used for options within AVOutputFormat.
> // In practice, any of the following three lines causes exception.
> const AVOption *o = av_opt_find2(ofmt, "segment_list_size", NULL,
> 0,  AV_OPT_SEARCH_CHILDREN, &target_obj);
> av_opt_get_int(ofmt, "segment_list_size", AV_OPT_SEARCH_CHILDREN, &i1);
> av_opt_set_int(ofmt, "segment_list_size", 10, AV_OPT_SEARCH_CHILDREN);
>
> Our question: If there is a way to overcome the problem, i.e. to
> set/get/find options for AVOutputFormat, like for AVCodecContext (for
> example)?

Why for AVOutputFormat? Isn't what you need AVFormatContext ?
>
> Thank you,
> Andrey Mochenov.
>

From andrey2067 at gmail.com  Tue Aug 13 14:57:47 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Tue, 13 Aug 2013 15:57:47 +0300
Subject: [Libav-user] HLS options problem
In-Reply-To: <CAPYw7P6QtPJ8PWAdOZQxYSrouwjgE7M-3ZfiiDRcnhHFhQV2NQ@mail.gmail.com>
References: <CACg7hcsbkut8xS75KRMQ2cqX-F8cS-9GDFH1FWmN9wpGfmngeg@mail.gmail.com>
	<CAPYw7P6QtPJ8PWAdOZQxYSrouwjgE7M-3ZfiiDRcnhHFhQV2NQ@mail.gmail.com>
Message-ID: <CACg7hcvXVz-TrxJWFR84Ocqv_D60SQEgePjyoTC_+A7iVKUwhg@mail.gmail.com>

Hi Paul,
Thank you, it is exactly what we need.
Andrey.

On Tue, Aug 13, 2013 at 3:40 PM, Paul B Mahol <onemda at gmail.com> wrote:

> On 8/13/13, Andrey Mochenov <andrey2067 at gmail.com> wrote:
> > Hi gentlemen,
> >
> > We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> > We are trying to write a simple HLS code example based on muxing.c
> standard
> > one.
> > Let be two input streams, video and audio (they can be synthetic, doesn't
> > matter).
> > Our purpose is to mux them into M3U8 playlist using HLS.
> > Suppose, duration of every TS segment file be 3 sec, and the desirable
> > maximum number of entries in M3U8 output file be 100.
> > From the FFmpeg application sources, one can see that the Apple HTTP Live
> > Streaming segmenter implemented in hlsenc.c file.
> > And the relevant options there are, as well: "hls_list_size", "hls_time",
> > etc.
> > The problem is that we have not succeeded to set/get/find these options
> in
> > a conventional way, as shown in the following code:
> >
> > // Here is a part of main() program
> > int64_t i1 = 0;
> > void *target_obj;
> > AVFormatContext *ofmt_ctx = NULL;
> > AVOutputFormat *ofmt = NULL;
> >
> > avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL,
> "Example_Out.m3u8");
> > ofmt = ofmt_ctx->oformat;
> >
> > // The relevant options ("hls_list_size", "hls_time") are located under
> > ofmt->priv_class->option.
> > // But AVClass *priv_class is not the first member of the AVOutputFormat.
> > // So, due to the documentation, av_opt_find...(), av_opt_get...() and
> > av_opt_set...()
> > // cannot be used for options within AVOutputFormat.
> > // In practice, any of the following three lines causes exception.
> > const AVOption *o = av_opt_find2(ofmt, "segment_list_size", NULL,
> > 0,  AV_OPT_SEARCH_CHILDREN, &target_obj);
> > av_opt_get_int(ofmt, "segment_list_size", AV_OPT_SEARCH_CHILDREN, &i1);
> > av_opt_set_int(ofmt, "segment_list_size", 10, AV_OPT_SEARCH_CHILDREN);
> >
> > Our question: If there is a way to overcome the problem, i.e. to
> > set/get/find options for AVOutputFormat, like for AVCodecContext (for
> > example)?
>
> Why for AVOutputFormat? Isn't what you need AVFormatContext ?
> >
> > Thank you,
> > Andrey Mochenov.
> >
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
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From onemda at gmail.com  Wed Aug 14 03:44:43 2013
From: onemda at gmail.com (Paul B Mahol)
Date: Wed, 14 Aug 2013 01:44:43 +0000
Subject: [Libav-user] using ffmpeg libraries to split a video
In-Reply-To: <CAGuXfB9HQPfzHLWf2muv+J5XGdXaeMcYmU9WT+a3iWzgxc2QcA@mail.gmail.com>
References: <CAGuXfB9HQPfzHLWf2muv+J5XGdXaeMcYmU9WT+a3iWzgxc2QcA@mail.gmail.com>
Message-ID: <CAPYw7P7O+zgXCpcPL0eG4fGnZvn6KEvL7CXYzK=6Ai934NYTLQ@mail.gmail.com>

On 8/11/13, Yousef Alhashemi <yousef.alhashemi at gmail.com> wrote:
> Hi,
>
> I asked a question on the ffmpeg support forum (ffmpeg.gusari.org) and
> someone pointed me to this list, so I'm repeating my question here:
>
> I would like to use ffmpeg libraries to split a video into equal-sized
> chunks of smaller files. For example, let's say I have a 100MB video that
> I'd like to split into 10 10MB videos using the same audio/video codec and
> container format. On the command-line, it would be something like this
> (assuming 10MB of data = 10 seconds of video): ffmpeg -i input.file -ss
> "00:00:00" -t "00:00:10" -vcodec copy -acodec copy output.file (and repeat
> the same for the remaining 9 chunks)
>
> My question is, what are the actual ffmpeg library calls that do the
> equivalent of this command? I can dig in the code and find out myself but
> that would take me a lot of time because I'm not familiar with the (large)
> code base of ffmpeg. I would appreciate any help from ffmpeg developers; I
> imagine this is easy to answer.

It is far from easy answer, you are actually asking someone to write
code for you.

From er.anshul.maheshwari at gmail.com  Wed Aug 14 05:51:54 2013
From: er.anshul.maheshwari at gmail.com (Anshul maheshwari)
Date: Wed, 14 Aug 2013 09:21:54 +0530
Subject: [Libav-user] using ffmpeg libraries to split a video
In-Reply-To: <CAPYw7P7O+zgXCpcPL0eG4fGnZvn6KEvL7CXYzK=6Ai934NYTLQ@mail.gmail.com>
References: <CAGuXfB9HQPfzHLWf2muv+J5XGdXaeMcYmU9WT+a3iWzgxc2QcA@mail.gmail.com>
	<CAPYw7P7O+zgXCpcPL0eG4fGnZvn6KEvL7CXYzK=6Ai934NYTLQ@mail.gmail.com>
Message-ID: <CAJMy86FXqvKCL8ri2z+-wKCyV5S6nToUW=OpCmDDqDtcrouw_w@mail.gmail.com>

On Aug 14, 2013 7:14 AM, "Paul B Mahol" <onemda at gmail.com> wrote:
>
> On 8/11/13, Yousef Alhashemi <yousef.alhashemi at gmail.com> wrote:
> > Hi,
> >
> > I asked a question on the ffmpeg support forum (ffmpeg.gusari.org) and
> > someone pointed me to this list, so I'm repeating my question here:
> >
> > I would like to use ffmpeg libraries to split a video into equal-sized
> > chunks of smaller files. For example, let's say I have a 100MB video
that
> > I'd like to split into 10 10MB videos using the same audio/video codec
and
> > container format. On the command-line, it would be something like this
> > (assuming 10MB of data = 10 seconds of video): ffmpeg -i input.file -ss
> > "00:00:00" -t "00:00:10" -vcodec copy -acodec copy output.file (and
repeat
> > the same for the remaining 9 chunks)
> >
> > My question is, what are the actual ffmpeg library calls that do the
> > equivalent of this command? I can dig in the code and find out myself
but
> > that would take me a lot of time because I'm not familiar with the
(large)
> > code base of ffmpeg. I would appreciate any help from ffmpeg
developers; I
> > imagine this is easy to answer.
>
> It is far from easy answer, you are actually asking someone to write
> code for you.
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

You may want to see the hls code, search for file hls
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From yousef.alhashemi at gmail.com  Wed Aug 14 08:41:47 2013
From: yousef.alhashemi at gmail.com (Yousef Alhashemi)
Date: Wed, 14 Aug 2013 09:41:47 +0300
Subject: [Libav-user] using ffmpeg libraries to split a video
In-Reply-To: <CAPYw7P7O+zgXCpcPL0eG4fGnZvn6KEvL7CXYzK=6Ai934NYTLQ@mail.gmail.com>
References: <CAGuXfB9HQPfzHLWf2muv+J5XGdXaeMcYmU9WT+a3iWzgxc2QcA@mail.gmail.com>
	<CAPYw7P7O+zgXCpcPL0eG4fGnZvn6KEvL7CXYzK=6Ai934NYTLQ@mail.gmail.com>
Message-ID: <CAGuXfB_zA=+a32MMuueRaoDDy+mYFhjUfi3Fr5ZWuR3jZAaesg@mail.gmail.com>

On Wed, Aug 14, 2013 at 4:44 AM, Paul B Mahol <onemda at gmail.com> wrote:

It is far from easy answer, you are actually asking someone to write
> code for you.
>

I'm not asking anyone to write code for me; I'm just asking about the
specific sequence of ffmpeg API calls that do what I want. E.g. 1)
Fictional_FFMPEG_Call_OpenFile(); 2)
Fictional_FFMPEG_Call_ReadVideoFrames(); 3)
Fictional_FFMPEG_Call_ReadAudioTrack(); 4) etc. I can take care of the
details.

Thanks,
Yousef
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From battistel at gmail.com  Wed Aug 14 10:07:16 2013
From: battistel at gmail.com (Massimo Battistel)
Date: Wed, 14 Aug 2013 10:07:16 +0200
Subject: [Libav-user]  Dinamically change volume
Message-ID: <CAHss8oG2ZBWqNU2iLG=qXJ3SPtVUdJqLBAwisPRgqGsHaiYtQg@mail.gmail.com>

hello,
I see libavfilter has the command "avfilter_graph_send_command" to change
filters parameters on runtime.
I also see not all the filters implement the "process_command" method,
volume filter including.

Is it possible to add "process_command" to volume filter?

thanks
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From omkarshetkar at gmail.com  Wed Aug 14 10:56:16 2013
From: omkarshetkar at gmail.com (Omkar Shetkar)
Date: Wed, 14 Aug 2013 14:26:16 +0530
Subject: [Libav-user] FFMPEG for HLS V4
Message-ID: <CAGnzPOm=M1aQCS5t5A0XWtzyzWYJ-XAmbsbO0pRZUr_7PAgEhg@mail.gmail.com>

Hi All,

   I am beginner in using FFMPEG library. I wanted to use this library to
support HLS V4.
Which version of HLS is supported by the latest release of FFMPEG(2.0.1) ?
In which version of FFMPEG I can find support for HLS V4?

Please clarify.
-- 
Regards
Omkar
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From onemda at gmail.com  Wed Aug 14 14:21:05 2013
From: onemda at gmail.com (Paul B Mahol)
Date: Wed, 14 Aug 2013 12:21:05 +0000
Subject: [Libav-user] Dinamically change volume
In-Reply-To: <CAHss8oG2ZBWqNU2iLG=qXJ3SPtVUdJqLBAwisPRgqGsHaiYtQg@mail.gmail.com>
References: <CAHss8oG2ZBWqNU2iLG=qXJ3SPtVUdJqLBAwisPRgqGsHaiYtQg@mail.gmail.com>
Message-ID: <CAPYw7P5F2TrdUZ9_wxcWmRrfNHfPxd3NzVhxUzmsK6O9tt9=eA@mail.gmail.com>

On 8/14/13, Massimo Battistel <battistel at gmail.com> wrote:
> hello,
> I see libavfilter has the command "avfilter_graph_send_command" to change
> filters parameters on runtime.
> I also see not all the filters implement the "process_command" method,
> volume filter including.
>
> Is it possible to add "process_command" to volume filter?

Yes it is. You could open feature request on bug tracker.

From hamidi at gmail.com  Wed Aug 14 14:38:35 2013
From: hamidi at gmail.com (hamidi)
Date: Wed, 14 Aug 2013 17:08:35 +0430
Subject: [Libav-user] 920523 - does ffmpeg support 4HKH?
Message-ID: <CALKzBkfJ-sMAtpkSaYBFuom+c1gxX0VXjMQqCrcGc69-FMwybw@mail.gmail.com>

hi
Hikvision company offers a DVR Card (DS-4016HCI). when i get stream and
dump it to a file i see that the first four characters are 4HKH. the format
seems weird. i could find a filter for Windows Media Player to play it. so
it's a video file anyway. but ffmpeg can't understand it. i could not play
it by ffplay. it doesn't recognize it. also vlc can't play it. i tried to
set the card to change the format to something familiar, but i couldn't
find a way. so, i thought about helping ffmpeg to recognize it. but i have
no idea how it may be possible.
any help/clue appreciated.
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From joe.flowers at nofreewill.com  Wed Aug 14 17:44:09 2013
From: joe.flowers at nofreewill.com (Joe Flowers)
Date: Wed, 14 Aug 2013 11:44:09 -0400
Subject: [Libav-user] --disable-pthreads ???
Message-ID: <CA+4=ZEOgBMhSxGBtkq3pO80oePN81Yuh9EuGgoZJVdrFs0twUQ@mail.gmail.com>

Hello Everyone,

I am writing a program that uses the FFMPeg libraries for audio encoding
and decoding, and I'm wondering if I should use the "--enable-pthreads"
configure option and what will be the harm if I use the
"--disable-pthreads" option?

It is possible that separate threads in our program will be using these
same FFMPEg functions at the same time.  Do we need to synchronize access
to these functions with a mutex, with or without the --disable-pthreads
option being set?

Are the same context or frame objects shared across threads?

Thanks!

Joe
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From andrey2067 at gmail.com  Thu Aug 15 13:29:07 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Thu, 15 Aug 2013 14:29:07 +0300
Subject: [Libav-user] HLS: Exactly constant segment duration
Message-ID: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>

Hi,

We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
Our purpose is to mux two streams (video and audio) into M3U8 playlist
using HLS.
In addition, we want the duration of every TS segment file be exactly 3.0
sec (frame rate is 25 fps).
To reach it, we are trying to set several options and properties, namely:
- segment_time
- keyint_min
- scenechange_threshold
- gop_size
- force_key_frames.

And our code looks as below:

AVCodecContext *codec_ctx = NULL;
AVFormatContext *ofmt_ctx = NULL;
int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps

// ofmt_ctx and codec_ctx initialization and filling are OK, but:

codec_ctx->time_base.num = 1;
codec_ctx->time_base.den = 25 // fps

// It seems, that the following three lines have no effect without explisit
setting of the "hls_time" property
codec_ctx->keyint_min = gopSize;       // in FFMpeg application, the
corresponding option is "-keyint_min 3"
codec_ctx->scenechange_threshold = 0;  // in FFMpeg application, the
corresponding option is "-sc_threshold 0"
codec_ctx->gop_size = gopSize;         // in FFMpeg application, the
corresponding option is "-g 3"

ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0, AV_OPT_SEARCH_CHILDREN);

// Any of the following lines causes "Option not found" error.
ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
AV_OPT_SEARCH_CHILDREN);
ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
AV_OPT_SEARCH_CHILDREN);
ret = av_opt_get(ofmt_ctx, "segment_time",  AV_OPT_SEARCH_CHILDREN, &str);
ret = av_opt_set((ofmt_ctx, "segment_time", "3.0", AV_OPT_SEARCH_CHILDREN);

Anyway, the TS files durations are different, (~2-3 sec), and not EXACTLY
3.0 sec.
Our question: What is the best way to solve the problem?

Andrey Mochenov.
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From andrey2067 at gmail.com  Thu Aug 15 13:41:18 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Thu, 15 Aug 2013 14:41:18 +0300
Subject: [Libav-user] Watermarks implementation
Message-ID: <CACg7hcune0BaG2U6V8TkueysZ8TD6s11_HNyQsHEmudCEHUucw@mail.gmail.com>

Hi,

We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
Our purpose is to add watermark (semi-transparent PNG image) on the video.
The corresponding option in MMpeg application is "-vf".

Our question: How to implement the feature using FFmpeg libraries?

Andrey Mochenov.
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From onemda at gmail.com  Thu Aug 15 13:43:57 2013
From: onemda at gmail.com (Paul B Mahol)
Date: Thu, 15 Aug 2013 11:43:57 +0000
Subject: [Libav-user] Watermarks implementation
In-Reply-To: <CACg7hcune0BaG2U6V8TkueysZ8TD6s11_HNyQsHEmudCEHUucw@mail.gmail.com>
References: <CACg7hcune0BaG2U6V8TkueysZ8TD6s11_HNyQsHEmudCEHUucw@mail.gmail.com>
Message-ID: <CAPYw7P5ftH0wvy=TikWycTWXEsfaadAuQ114OzgvS86DoMdqiA@mail.gmail.com>

On 8/15/13, Andrey Mochenov <andrey2067 at gmail.com> wrote:
> Hi,
>
> We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> Our purpose is to add watermark (semi-transparent PNG image) on the video.
> The corresponding option in MMpeg application is "-vf".
>
> Our question: How to implement the feature using FFmpeg libraries?

By using overlay filter, there are examples how to use filters with libraries.

>
> Andrey Mochenov.
>

From malutik at yandex.ru  Thu Aug 15 20:23:08 2013
From: malutik at yandex.ru (=?koi8-r?B?5cvB1MXSyc7B?=)
Date: Thu, 15 Aug 2013 22:23:08 +0400
Subject: [Libav-user] How to feed data to libav from ethernet streams with
	video&audio threads
Message-ID: <585971376590988@web14d.yandex.ru>

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From andrey.krieger.utkin at gmail.com  Thu Aug 15 21:29:58 2013
From: andrey.krieger.utkin at gmail.com (Andrey Utkin)
Date: Thu, 15 Aug 2013 22:29:58 +0300
Subject: [Libav-user] How to feed data to libav from ethernet streams
 with video&audio threads
In-Reply-To: <585971376590988@web14d.yandex.ru>
References: <585971376590988@web14d.yandex.ru>
Message-ID: <CANZNk80bMKCxAaPO1qQProfOgWDcY5JHpTjvMe+1q=cay6tVaA@mail.gmail.com>

2013/8/15 ????????? <malutik at yandex.ru>:
> I  guess how to collect video frame but don't know how to specify correct
> context( AVFormatContext) and
> write data to AVPacket structure (possibly using av_packet_from_data).
>
> Please suggest how to feed data to libav from ethernet streams to
> get file ***.avi which consists of video and audio threads.

See avformat_new_stream(). Call it for each elementary stream you
have, on the output file context. The rest depends on whether you
transcode data or remux it (i.e. just copy AVPackets you got).

-- 
Andrey Utkin

From gga96 at skymesh.com.au  Fri Aug 16 01:54:48 2013
From: gga96 at skymesh.com.au (Glen)
Date: Fri, 16 Aug 2013 09:54:48 +1000
Subject: [Libav-user] Help or Higher Level Interface Libraries
Message-ID: <5B90443FD2AB4E5D8AEF74E702C190BC@GlenPC>

Hi All,

I have not worked with the FFmpeg libraries before and would appreciate some initial guidance.

I am researching a new project that involves the random access of the decoded video frames. 

I believe there is a need to initially map the ?I? frame offsets in the input stream to gain the random access required. The mapping I can do.

Where I need help is, having found the ?I? frame offset how do I proceed to extract the AVFrame (a pointer to the decoded frame matrix) using the FFmpeg libraries. The libraries cover an extensive amount of data and I am getting lost in the detail. 

Can you please help to get the interface sorted?

Or is there an approved 3rd party higher level library that interfaces with the backed FFmpeg libs?

All help is appreciated.

Glen

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From krueger at lesspain.de  Fri Aug 16 10:06:54 2013
From: krueger at lesspain.de (=?UTF-8?Q?Robert_Kr=C3=BCger?=)
Date: Fri, 16 Aug 2013 10:06:54 +0200
Subject: [Libav-user] Help or Higher Level Interface Libraries
In-Reply-To: <5B90443FD2AB4E5D8AEF74E702C190BC@GlenPC>
References: <5B90443FD2AB4E5D8AEF74E702C190BC@GlenPC>
Message-ID: <CAEnqZEWTfDWGjL=F68V=rmZtL-mKysW+0Mdv6tgVB9GtG5JKbA@mail.gmail.com>

On Fri, Aug 16, 2013 at 1:54 AM, Glen <gga96 at skymesh.com.au> wrote:
> Hi All,
>
> I have not worked with the FFmpeg libraries before and would appreciate some
> initial guidance.
>
> I am researching a new project that involves the random access of the
> decoded video frames.
>
> I believe there is a need to initially map the ?I? frame offsets in the
> input stream to gain the random access required. The mapping I can do.
>
> Where I need help is, having found the ?I? frame offset how do I proceed to
> extract the AVFrame (a pointer to the decoded frame matrix) using the FFmpeg
> libraries. The libraries cover an extensive amount of data and I am getting
> lost in the detail.
>
> Can you please help to get the interface sorted?
>
> Or is there an approved 3rd party higher level library that interfaces with
> the backed FFmpeg libs?

there may be some projects out there but "approved" by the ffmpeg
project, I don't know. For the task you describe, getting something to
work with libavformat and libavcodec should not be too difficult
although the learning curve is a bit steep at the beginning. I would
start with demuxing.c in the examples directory and then take a look
at the avformat_seek_file function to add the random access to the
I-frames.

Good luck,

Robert

From malutik at yandex.ru  Fri Aug 16 11:20:25 2013
From: malutik at yandex.ru (=?koi8-r?B?5cvB1MXSyc7B?=)
Date: Fri, 16 Aug 2013 13:20:25 +0400
Subject: [Libav-user] How to feed data to libav from ethernet streams
	with video&audio threads
In-Reply-To: <CANZNk80bMKCxAaPO1qQProfOgWDcY5JHpTjvMe+1q=cay6tVaA@mail.gmail.com>
References: <585971376590988@web14d.yandex.ru>
	<CANZNk80bMKCxAaPO1qQProfOgWDcY5JHpTjvMe+1q=cay6tVaA@mail.gmail.com>
Message-ID: <160651376644825@web17f.yandex.ru>

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From andrey.krieger.utkin at gmail.com  Fri Aug 16 11:27:36 2013
From: andrey.krieger.utkin at gmail.com (Andrey Utkin)
Date: Fri, 16 Aug 2013 12:27:36 +0300
Subject: [Libav-user] How to feed data to libav from ethernet streams
 with video&audio threads
In-Reply-To: <160651376644825@web17f.yandex.ru>
References: <585971376590988@web14d.yandex.ru>
	<CANZNk80bMKCxAaPO1qQProfOgWDcY5JHpTjvMe+1q=cay6tVaA@mail.gmail.com>
	<160651376644825@web17f.yandex.ru>
Message-ID: <CANZNk82LD-KW9+yzXUGS7tx0UgN_fE4qLkxeHD4hgR36jSVMpw@mail.gmail.com>

2013/8/16 ????????? <malutik at yandex.ru>:
> Where is a mistake?

No guesses which mistake is fatal here (although you have spare
avio_open() as i see).
You have to use debugger to see what instruction produces failure.
Or try forming minimal isolated code snippet (and media file) which
reproduces your problem, and compiles on linux (because the majority
of developers doesn't use Visual Studio).

-- 
Andrey Utkin

From nisar.med at gmail.com  Fri Aug 16 16:00:35 2013
From: nisar.med at gmail.com (Nisar Ahmed)
Date: Fri, 16 Aug 2013 19:00:35 +0500
Subject: [Libav-user] muxing h264/aac stream
Message-ID: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>

I am muxing h264/aac stream to mp4 coming from an encoder and having issues
syncing audio and video streams.

I suspect that the problem is with PTS and DTS but I am not sure what
values should i set to properly sync both streams.

I have set the time_base of video stream's AVCodecContext to 1001/30000 and
each AVPacket gets a duration of 1001

I am recieving time stamps from the encoder with each NAL packet which is
set as PTS of the AVPacket. the sequence of PTS/DTS I set is (2002/0,
0/1001, 1001/2002, 5005/3003, 3003/4004...)

Audio stream AVCodecContext sample rate is 48000 and PTS/DTS are simply
multiples of 1024 starting from 0 and AVPacket duration is 1024.

The output movie 's frame rate is 20fps when it should be 29.97fps as it is
ntsc.

Please tell me how to debug this problem and what are the guidelines of
creating pts/dts for both video and audio in my case
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From nfxjfg at googlemail.com  Fri Aug 16 17:46:48 2013
From: nfxjfg at googlemail.com (wm4)
Date: Fri, 16 Aug 2013 17:46:48 +0200
Subject: [Libav-user] Help or Higher Level Interface Libraries
In-Reply-To: <5B90443FD2AB4E5D8AEF74E702C190BC@GlenPC>
References: <5B90443FD2AB4E5D8AEF74E702C190BC@GlenPC>
Message-ID: <20130816174648.4ba671bd@debian>

On Fri, 16 Aug 2013 09:54:48 +1000
"Glen" <gga96 at skymesh.com.au> wrote:

> Hi All,
> 
> I have not worked with the FFmpeg libraries before and would appreciate some initial guidance.
> 
> I am researching a new project that involves the random access of the decoded video frames. 

There's this library: https://code.google.com/p/ffmpegsource/

It provides a stable interface to the ffmpeg libraries, as well as
random access to video frames at least.

From stears333 at gmail.com  Fri Aug 16 11:06:42 2013
From: stears333 at gmail.com (=?ISO-8859-1?B?wWThbSBK4W5vc3N5?=)
Date: Fri, 16 Aug 2013 11:06:42 +0200
Subject: [Libav-user] When will ffmpeg incorporate the LENTOID HEVC codec
Message-ID: <CAFfqHGV5qTtwyaEinoCdF2Kje4EN7UCJd2Btxo9uW+w_e5kqkg@mail.gmail.com>

Hello!

When will the ffmpeg inforporate the (X265 or the LENTOID) HEVC codecs?

Thank you for your reply!
Adam Janossy
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From er.anshul.maheshwari at gmail.com  Fri Aug 16 23:10:59 2013
From: er.anshul.maheshwari at gmail.com (Anshul maheshwari)
Date: Sat, 17 Aug 2013 02:40:59 +0530
Subject: [Libav-user] muxing h264/aac stream
In-Reply-To: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>
References: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>
Message-ID: <CAJMy86HO_yVqABRe0zFUZZPUj1YXYO-jLXKEUZ5n-6zaxhi7zg@mail.gmail.com>

-
On Aug 16, 2013 7:30 PM, "Nisar Ahmed" <nisar.med at gmail.com> wrote:
>
> I am muxing h264/aac stream to mp4 coming from an encoder and having
issues syncing audio and video streams.
>
> I suspect that the problem is with PTS and DTS but I am not sure what
values should i set to properly sync both streams.
>
> I have set the time_base of video stream's AVCodecContext to 1001/30000
and each AVPacket gets a duration of 1001
>
> I am recieving time stamps from the encoder with each NAL packet which is
set as PTS of the AVPacket. the sequence of PTS/DTS I set is (2002/0,
0/1001, 1001/2002, 5005/3003, 3003/4004...)
>
> Audio stream AVCodecContext sample rate is 48000 and PTS/DTS are simply
multiples of 1024 starting from 0 and AVPacket duration is 1024.
>
> The output movie 's frame rate is 20fps when it should be 29.97fps as it
is ntsc.
>
> Please tell me how to debug this problem and what are the guidelines of
creating pts/dts for both video and audio in my case
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
Hi naseer

If you are getting timestamp with encoder,  i would suggest "dont try to
manuplate that" you may set that same timestamp as presentation timestamp
(pts) if your video is realtime then try not to generate B type video frame
hence no need to set dts.
Whatever clock is set by encoder try generating the pts of audio according
to that.

@enjoy
Anshul
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From nisar.med at gmail.com  Sat Aug 17 08:05:40 2013
From: nisar.med at gmail.com (Nisar Ahmed)
Date: Sat, 17 Aug 2013 11:05:40 +0500
Subject: [Libav-user] muxing h264/aac stream
In-Reply-To: <CAJMy86HO_yVqABRe0zFUZZPUj1YXYO-jLXKEUZ5n-6zaxhi7zg@mail.gmail.com>
References: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>
	<CAJMy86HO_yVqABRe0zFUZZPUj1YXYO-jLXKEUZ5n-6zaxhi7zg@mail.gmail.com>
Message-ID: <CAL1+ejjkKHX90dgg=-w9tbQLyqoagNdCJ0k+ArBJnbAOzzs+tg@mail.gmail.com>

Thanks for your answer, when I set timestamp of decoder, the frame rate
jumps up to a very large value

pts/dts = (2002/0, 0/0, 1001/0, 5005/0, 3003/0...)

am I setting the time_base to correct values 1001/30000 and pkt.duration =
1001? the timescale of the timestamp is also 30000


On Sat, Aug 17, 2013 at 2:10 AM, Anshul maheshwari <
er.anshul.maheshwari at gmail.com> wrote:

> -
>
> On Aug 16, 2013 7:30 PM, "Nisar Ahmed" <nisar.med at gmail.com> wrote:
> >
> > I am muxing h264/aac stream to mp4 coming from an encoder and having
> issues syncing audio and video streams.
> >
> > I suspect that the problem is with PTS and DTS but I am not sure what
> values should i set to properly sync both streams.
> >
> > I have set the time_base of video stream's AVCodecContext to 1001/30000
> and each AVPacket gets a duration of 1001
> >
> > I am recieving time stamps from the encoder with each NAL packet which
> is set as PTS of the AVPacket. the sequence of PTS/DTS I set is (2002/0,
> 0/1001, 1001/2002, 5005/3003, 3003/4004...)
> >
> > Audio stream AVCodecContext sample rate is 48000 and PTS/DTS are simply
> multiples of 1024 starting from 0 and AVPacket duration is 1024.
> >
> > The output movie 's frame rate is 20fps when it should be 29.97fps as it
> is ntsc.
> >
> > Please tell me how to debug this problem and what are the guidelines of
> creating pts/dts for both video and audio in my case
> >
> > _______________________________________________
> > Libav-user mailing list
> > Libav-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/libav-user
> >
> Hi naseer
>
> If you are getting timestamp with encoder,  i would suggest "dont try to
> manuplate that" you may set that same timestamp as presentation timestamp
> (pts) if your video is realtime then try not to generate B type video frame
> hence no need to set dts.
> Whatever clock is set by encoder try generating the pts of audio according
> to that.
>
> @enjoy
> Anshul
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
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From gaoyuan1024 at gmail.com  Sun Aug 18 05:26:11 2013
From: gaoyuan1024 at gmail.com (gaoyuan)
Date: Sun, 18 Aug 2013 11:26:11 +0800
Subject: [Libav-user] motion vector extraction in H.264 video
Message-ID: <002c01ce9bc2$b1c065e0$154131a0$@gmail.com>

Hi, all!

 

  I'm trying to extract motion vector in the H.264 video using Zeranoe's
FFmpeg Builds.

 

  FFmpeg version: 2013-06-23 git-c329713

  libavutil      52. 37.101 / 52. 37.101

  libavcodec     55. 16.100 / 55. 16.100

  libavformat    55.  9.100 / 55.  9.100

  libavdevice    55.  2.100 / 55.  2.100

  libavfilter     3. 77.101 /  3. 77.101

  libswscale      2.  3.100 /  2.  3.100

  libswresample   0. 17.102 /  0. 17.102

  libpostproc    52.  3.100 / 52.  3.100

 

This FFmpeg build was configured with:

  --disable-static --enable-shared --enable-gpl --enable-version3
--disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig
--enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm
--enable-libilbc --enable-libmodplug --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis
--enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid
--enable-zlib

  

  I refered to the method in this blog
http://jiasi.blogspot.com/2011/05/motion-vector-extraction.html and compiled
the code in VS 2012 under windows 7.

 

  I've set the debug_mv of AVCodecContext as FF_DEBUG_VIS_MV_P_FOR |
FF_DEBUG_VIS_MV_B_FOR, and get the result as followed. But the motion_val in
AVFrame did't have the corresponding value. Have you guys meet with this
problem?

 



 

Thanks

Gao Yuan :)

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From soho123.2012 at gmail.com  Sun Aug 18 07:50:39 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Sun, 18 Aug 2013 13:50:39 +0800
Subject: [Libav-user] Fwd: HELP!HELP! ffmpeg+ffserver stability issue via
	127.0.0.1 http post
In-Reply-To: <CAFd2cZUKEcdjATurzjJZJJMZOTOToFGuVa0WbaaV1=EA1GjNvQ@mail.gmail.com>
References: <CAFd2cZUKEcdjATurzjJZJJMZOTOToFGuVa0WbaaV1=EA1GjNvQ@mail.gmail.com>
Message-ID: <CAFd2cZUx4t9q_9eP8pOzf4-_WU3mxvjF0GAz7jtiJTSSoA3eLA@mail.gmail.com>

Hi All,

When I try to setup a stream server with ffmpeg+ ffserver.
the problem I got is :
ffmpeg use tcp to connect ffserver. then ffmpeg use http post to send video
data to ffserver via loopback.

the source of video data is from usb webcam,
ffmpeg capture video then post to ffserver via tcp socket through loopback
netdev.
it is not stable via http 127.0.0.1 post.
since sometime ffserver says : there is not new data ready for read (the
result is from poll).
then no any data can be sent to remote vlc client for preview.
the video stream will be disconnected.
Does anyone have idea about http post to 127.0.0.1 from ffmpeg to ffserver?

why it is not stable?
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From soho123.2012 at gmail.com  Sun Aug 18 07:51:02 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Sun, 18 Aug 2013 13:51:02 +0800
Subject: [Libav-user] Fwd: [HELP][HELP]ffmpeg can not post new video data to
	ffserver
In-Reply-To: <CAFd2cZXik36M2n1DAHc=bhFu4Xtexyd0=ynPuF6vTkac63Um-Q@mail.gmail.com>
References: <CAFd2cZWMxuu+fMAFnh=A9VJ6n6qTE9BwxWX9yo5qjnX2oqMtEw@mail.gmail.com>
	<CAFd2cZXik36M2n1DAHc=bhFu4Xtexyd0=ynPuF6vTkac63Um-Q@mail.gmail.com>
Message-ID: <CAFd2cZWeSrBXX8rWGyf-ChQcjQ18Xhu7F4a_rGyhknZu62Az8g@mail.gmail.com>

Hi All,

I got the problem about ffmpeg post fail to ffserver.
I use the solution ffmpeg+ ffserver for a stream server.
the stream can work for a few minutes, then ffmpeg can not post video data
via http://localhost:8090/feed1.ffm
the command line I use for ffmpeg:
ffmpeg -loglevel debug -f video4linux2 -r 30 -s 1280x720 -input_format h264
-i /dev/video1 -vcodec
copy http://localhost:8090/feed1.ffm


ffserver can not receive new video data from ffmpeg if the stream is
running for about 30~60 minutes.
I check the errno from ffmpeg av_interleaved_write_frame()
it says "No such file or directory"
errno is 2

Does anyone have ideas?
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From soho123.2012 at gmail.com  Sun Aug 18 07:51:33 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Sun, 18 Aug 2013 13:51:33 +0800
Subject: [Libav-user] Fwd: [HELP] ffmpeg post to local loopback stuck
In-Reply-To: <CAFd2cZWwRyS2AEMTm=-DZJLDXVBTMaL-Mp=eK3T3dEimyOHPwQ@mail.gmail.com>
References: <CAFd2cZWwRyS2AEMTm=-DZJLDXVBTMaL-Mp=eK3T3dEimyOHPwQ@mail.gmail.com>
Message-ID: <CAFd2cZVmqHCY9F1sPyaN_r33FGbOA=T5NNf8s-R6yiO7xdUcsQ@mail.gmail.com>

Hi all,


when I setup a stream server with ffserver + ffmpeg,
the command :
ffmpeg -sn -loglevel debug -f video4linux2 -r 30 -s 1280x720 -input_format
h264 -i /dev/video1 -vcodec copy http://localhost:8090/feed2.ffm

it can work for a few minutes only .
because ffserver can not get new video data  from ffmpeg local post.
ffmpeg get stuck when it send video to localhost.

Does anyone have idea about this issue?
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From info at denisgottardello.it  Sun Aug 18 12:53:46 2013
From: info at denisgottardello.it (Denis)
Date: Sun, 18 Aug 2013 12:53:46 +0200
Subject: [Libav-user] Build FFmpeg on raspberry pi
Message-ID: <201308181253.46578.info@denisgottardello.it>

./configure --enable-gpl --enable-nonfree --enable-libx264 --enable-libvorbis --enable-libtheora --enable-libvpx --enable-shared --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver
(I use these options on Debian i386 without any problem.)

ends correctly with 

License: nonfree and unredistributable
Creating config.mak, config.h, and doc/config.texi...
config.h is unchanged
libavutil/avconfig.h is unchanged

but whe i try to execute make I obtain the error:

pi at raspberrypi ~/Cpp/ffmpeg-2.0 $ make
Makefile:1: ../config.mak: File o directory non esistente
make: *** No rule to make target `../config.mak'.  Stop.
pi at raspberrypi ~/Cpp/ffmpeg-2.0 $ 

What it means?

-- 
www.denisgottardello.it
Skype: mrdebug
Videosurveillance and home automation! 
http://www.denisgottardello.it/DomusBoss/DomusBoss.php

From andrey2067 at gmail.com  Sun Aug 18 13:20:39 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Sun, 18 Aug 2013 14:20:39 +0300
Subject: [Libav-user] Watermarks implementation
In-Reply-To: <CAPYw7P5ftH0wvy=TikWycTWXEsfaadAuQ114OzgvS86DoMdqiA@mail.gmail.com>
References: <CACg7hcune0BaG2U6V8TkueysZ8TD6s11_HNyQsHEmudCEHUucw@mail.gmail.com>
	<CAPYw7P5ftH0wvy=TikWycTWXEsfaadAuQ114OzgvS86DoMdqiA@mail.gmail.com>
Message-ID: <CACg7hct_+hidKHi_aCQh5Lnw2-s5YS1HB8-v-D6PKmbAYCo9rg@mail.gmail.com>

Hi Paul,

Thank you for your answer. So, I have tried to use overlay filter.
I use two "buffer" filters for its inputs and one "buffersink" filter for
its ouput, as shown in the code below.
The problem is that the avfilter_graph_config() command causes the error:
'Output pad "default" with type video of the filter instance
"input_main_filter"
of buffer not connected to any destination.'

AVFormatContext *fmt_ctx_main;
AVCodecContext *dec_ctx_main;
AVFormatContext *fmt_ctx_wtrmrk;
AVCodecContext *dec_ctx_wtrmrk;
AVFilterContext *buffersink_ctx = NULL;
AVFilterContext *buffersrc_ctx = NULL;
AVFilterContext *bufferovrlay_ctx = NULL;
AVFilterGraph *filter_graph = NULL;

...
// All fmt_ctx_main, dec_ctx_main, fmt_ctx_wtrmrk, dec_ctx_wtrmrk
initializations are OK.

char argsStrMain[512] = "";
char argsStrOvrlay[512] = "";
int ret = 0;

AVFilter *buffersrc = avfilter_get_by_name("buffer");
AVFilter *bufferovrlay = avfilter_get_by_name("buffer");
AVFilter *buffersink = avfilter_get_by_name("buffersink");

AVFilterInOut *inputs = avfilter_inout_alloc();
AVFilterInOut *outputs = avfilter_inout_alloc();
AVFilterInOut *outputOvrlay = avfilter_inout_alloc();

enum AVPixelFormat pix_fmts[] = {AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE};

AVBufferSinkParams *buffersink_params = NULL;

sprintf_s(argsStrMain, sizeof(argsStrMain),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
          dec_ctx_main->width, dec_ctx_main->height, dec_ctx_main->pix_fmt,
          dec_ctx_main->time_base.num, dec_ctx_main->time_base.den,
          dec_ctx_main->sample_aspect_ratio.num,
dec_ctx_main->sample_aspect_ratio.den);

sprintf_s(argsStrOvrlay, sizeof(argsStrOvrlay),
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:pixel_aspect=%d/%d",
          dec_ctx_wtrmrk->width, dec_ctx_wtrmrk->height,
dec_ctx_wtrmrk->pix_fmt,
          dec_ctx_wtrmrk->time_base.num, dec_ctx_wtrmrk->time_base.den,
          dec_ctx_wtrmrk->sample_aspect_ratio.num,
dec_ctx_wtrmrk->sample_aspect_ratio.den);

buffersink_params = av_buffersink_params_alloc();
buffersink_params->pixel_fmts = pix_fmts;

filter_graph = avfilter_graph_alloc();

ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc,
"input_main_filter", argsStrMain, NULL, filter_graph);
ret = avfilter_graph_create_filter(&bufferovrlay_ctx, bufferovrlay,
"input_overlay_filter", argsStrOvrlay, NULL, filter_graph);
ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink,
"output_filter", NULL, buffersink_params, filter_graph);

outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx    = 0;
outputs->next       = outputOvrlay;

outputOvrlay->name = av_strdup("overlay");   // unique name for this
input/output in the list
outputs->filter_ctx = bufferovrlay_ctx;      // filter context associated
to this input/output
outputs->pad_idx    = 0;                     // index of the filt_ctx pad
to use for linking
outputs->next       = NULL;                  // next input/output in the
list, NULL if this is the last

inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx    = 0;
inputs->next       = NULL;

ret = avfilter_graph_parse(filter_graph, "overlay", &inputs, &outputs,
NULL);

// Till now it looks all OK, but the following line causes the error:
// 'Output pad "default" with type video of the filter instance
"input_main_filter"
// of buffer not connected to any destination.'
ret = avfilter_graph_config(filter_graph, NULL);

I suppose, the reason is a wrong assigment of inputs/outputs.
But what exactly is wrong? What is the right way to link two ore more
inputs to a filter like the 'overlay' one? Please, help.

Andrey.
On Thu, Aug 15, 2013 at 2:43 PM, Paul B Mahol <onemda at gmail.com> wrote:

>  On 8/15/13, Andrey Mochenov <andrey2067 at gmail.com> wrote:
> > Hi,
> >
> > We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> > Our purpose is to add watermark (semi-transparent PNG image) on the
> video.
> > The corresponding option in MMpeg application is "-vf".
> >
> > Our question: How to implement the feature using FFmpeg libraries?
>
> By using overlay filter, there are examples how to use filters with
> libraries.
>
> >
> > Andrey Mochenov.
> >
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
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From soho123.2012 at gmail.com  Sun Aug 18 15:06:43 2013
From: soho123.2012 at gmail.com (Soho Soho123)
Date: Sun, 18 Aug 2013 21:06:43 +0800
Subject: [Libav-user] HELP! ffserver polling get no any fd ready for read,
	even ffmpeg post connection
Message-ID: <CAFd2cZUUB8F0==SP0EmpH1+4__0xeRpdVVsa25=778mGiTmOTQ@mail.gmail.com>

HI all,

the problem I got for a long time.

when ffserver usd poll to get the fd that ready for read/write, then each
connection can get service.
but sometimes,
ffserver get a condition:
c->poll_entry->revents does not include any events about POLLIN, even the
post connection from ffmpeg.
ffmpeg keep posting video data to ffserver, then the feed file can get new
video data.

I check the error code from ffmpeg.
It says , send timeout that the receive side does not read the data on time.

ffserver says there is no fd ready for read.
ffmpeg says that the receive side does not read data on time.

Does any one have idea?



.
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From wseemann at gmail.com  Mon Aug 19 06:19:30 2013
From: wseemann at gmail.com (William Seemann)
Date: Sun, 18 Aug 2013 23:19:30 -0500
Subject: [Libav-user] bad src image pointer error when converting MP4 frame
	to PNG
Message-ID: <52119CD2.3040905@gmail.com>

Hello,
     I'm using the following code to convert a frame from a mp4 video to 
a PNG image. Whenever I execute the my function (posted below) I receive 
the following error message:

     [swscaler @ 0x7fe4fb818600] bad src image pointers

This error occurs at the following line in my code:

sws_scale(scalerCtx,
               (const uint8_t * const *) pFrame->data,
               pFrame->linesize,
               0,
               src_height,
               pFrameRGB->data,
               pFrameRGB->linesize);

I've tracked down the error message in the FFmpeg source code but I'm 
unsure how to solve this problem. Can anyone help? Thanks in advance!

void convert_image(AVCodecContext *pCodecCtx, AVFrame *pFrame, AVPacket 
*avpkt, int *got_packet_ptr) {
     AVCodecContext *codecCtx;
     AVCodec *codec;

     *got_packet_ptr = 0;

     codec = avcodec_find_encoder(TARGET_IMAGE_CODEC);
     if (!codec) {
         printf("avcodec_find_decoder() failed to find decoder\n");
         goto fail;
     }

     codecCtx = avcodec_alloc_context3(codec);
     if (!codecCtx) {
         printf("avcodec_alloc_context3 failed\n");
         goto fail;
     }

     codecCtx->bit_rate = pCodecCtx->bit_rate;
     codecCtx->width = pCodecCtx->width;
     codecCtx->height = pCodecCtx->height;
     codecCtx->pix_fmt = TARGET_IMAGE_FORMAT;
     codecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
     codecCtx->time_base.num = pCodecCtx->time_base.num;
     codecCtx->time_base.den = pCodecCtx->time_base.den;

     if (!codec || avcodec_open2(codecCtx, codec, NULL) < 0) {
           printf("avcodec_open2() failed\n");
         goto fail;
     }

     int src_width = pCodecCtx->width;
     int src_height = pCodecCtx->height;
     enum PixelFormat src_pixfmt = pCodecCtx->pix_fmt;
     int dst_width = pCodecCtx->width;
     int dst_height = pCodecCtx->height;

     struct SwsContext *scalerCtx;

     scalerCtx = sws_getContext(src_width,
             src_height,
             src_pixfmt,
             dst_width,
             dst_height,
             TARGET_IMAGE_FORMAT,
             SWS_BILINEAR,
             NULL, NULL, NULL);

     if (!scalerCtx) {
         printf("sws_getContext() failed\n");
         goto fail;
     }

     AVFrame *pFrameRGB = avcodec_alloc_frame();

     if (!pFrameRGB) {
         goto fail;
     }

     int numBytes = avpicture_get_size(TARGET_IMAGE_FORMAT, src_width, 
src_height);
     uint8_t *buffer = (uint8_t *) av_malloc(numBytes * sizeof(uint8_t));

     if (avpicture_fill((AVPicture *) pFrameRGB,
             buffer,
             TARGET_IMAGE_FORMAT,
             src_width,
             src_height) < 0) {
         printf("avpicture_fill() failed\n");
         goto fail;
     }

     sws_scale(scalerCtx,
               (const uint8_t * const *) pFrame->data,
               pFrame->linesize,
               0,
               src_height,
               pFrameRGB->data,
               pFrameRGB->linesize);

     int ret = avcodec_encode_video2(codecCtx, avpkt, pFrameRGB, 
got_packet_ptr);

     if (ret < 0) {
         *got_packet_ptr = 0;
     }

     // TODO is this right?
     fail:
     if (codecCtx) {
         avcodec_close(codecCtx);
     }

     if (scalerCtx) {
         sws_freeContext(scalerCtx);
     }

     if (ret < 0 || !*got_packet_ptr) {
         av_free_packet(avpkt);
     }
}

From andrey2067 at gmail.com  Mon Aug 19 09:11:51 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Mon, 19 Aug 2013 10:11:51 +0300
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
Message-ID: <CACg7hcu=ZtwaiFoFR8TM7mrNGjuXyqM=q=dUv1SpE+5ker5++Q@mail.gmail.com>

Hi gentlemen,

Please, help us with the following question:
What is the best way to force an EXACTLY constant video segment duration?
We need the solution urgently.

Best regards,
Andrey.


On Thu, Aug 15, 2013 at 2:29 PM, Andrey Mochenov <andrey2067 at gmail.com>wrote:

>  Hi,
>
> We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> Our purpose is to mux two streams (video and audio) into M3U8 playlist
> using HLS.
> In addition, we want the duration of every TS segment file be exactly 3.0
> sec (frame rate is 25 fps).
> To reach it, we are trying to set several options and properties, namely:
> - segment_time
> - keyint_min
> - scenechange_threshold
> - gop_size
> - force_key_frames.
>
> And our code looks as below:
>
> AVCodecContext *codec_ctx = NULL;
> AVFormatContext *ofmt_ctx = NULL;
> int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
>
> // ofmt_ctx and codec_ctx initialization and filling are OK, but:
>
> codec_ctx->time_base.num = 1;
> codec_ctx->time_base.den = 25 // fps
>
> // It seems, that the following three lines have no effect without
> explisit setting of the "hls_time" property
> codec_ctx->keyint_min = gopSize;       // in FFMpeg application, the
> corresponding option is "-keyint_min 3"
> codec_ctx->scenechange_threshold = 0;  // in FFMpeg application, the
> corresponding option is "-sc_threshold 0"
> codec_ctx->gop_size = gopSize;         // in FFMpeg application, the
> corresponding option is "-g 3"
>
> ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0, AV_OPT_SEARCH_CHILDREN);
>
> // Any of the following lines causes "Option not found" error.
> ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
> AV_OPT_SEARCH_CHILDREN);
> ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
> AV_OPT_SEARCH_CHILDREN);
> ret = av_opt_get(ofmt_ctx, "segment_time",  AV_OPT_SEARCH_CHILDREN, &str);
> ret = av_opt_set((ofmt_ctx, "segment_time", "3.0", AV_OPT_SEARCH_CHILDREN);
>
> Anyway, the TS files durations are different, (~2-3 sec), and not EXACTLY
> 3.0 sec.
> Our question: What is the best way to solve the problem?
>
> Andrey Mochenov.
>
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From er.anshul.maheshwari at gmail.com  Mon Aug 19 09:48:28 2013
From: er.anshul.maheshwari at gmail.com (Anshul maheshwari)
Date: Mon, 19 Aug 2013 13:18:28 +0530
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
Message-ID: <CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>

On Aug 15, 2013 4:59 PM, "Andrey Mochenov" <andrey2067 at gmail.com> wrote:
>
> Hi,
>
> We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> Our purpose is to mux two streams (video and audio) into M3U8 playlist
using HLS.
> In addition, we want the duration of every TS segment file be exactly 3.0
sec (frame rate is 25 fps).
> To reach it, we are trying to set several options and properties, namely:
> - segment_time
> - keyint_min
> - scenechange_threshold
> - gop_size
> - force_key_frames.
>
> And our code looks as below:
>
> AVCodecContext *codec_ctx = NULL;
> AVFormatContext *ofmt_ctx = NULL;
> int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
>
> // ofmt_ctx and codec_ctx initialization and filling are OK, but:
>
> codec_ctx->time_base.num = 1;
> codec_ctx->time_base.den = 25 // fps
>
> // It seems, that the following three lines have no effect without
explisit setting of the "hls_time" property
> codec_ctx->keyint_min = gopSize;       // in FFMpeg application, the
corresponding option is "-keyint_min 3"
> codec_ctx->scenechange_threshold = 0;  // in FFMpeg application, the
corresponding option is "-sc_threshold 0"
> codec_ctx->gop_size = gopSize;         // in FFMpeg application, the
corresponding option is "-g 3"
>
> ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0,
AV_OPT_SEARCH_CHILDREN);
>
> // Any of the following lines causes "Option not found" error.
> ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
AV_OPT_SEARCH_CHILDREN);
> ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
AV_OPT_SEARCH_CHILDREN);
> ret = av_opt_get(ofmt_ctx, "segment_time",  AV_OPT_SEARCH_CHILDREN, &str);
> ret = av_opt_set((ofmt_ctx, "segment_time", "3.0",
AV_OPT_SEARCH_CHILDREN);
>
> Anyway, the TS files durations are different, (~2-3 sec), and not EXACTLY
3.0 sec.
> Our question: What is the best way to solve the problem?
>
> Andrey Mochenov.
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>

Please dont top post over here

Try to set encoder with all idr,  that may give you const duration
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From andrey2067 at gmail.com  Mon Aug 19 11:48:29 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Mon, 19 Aug 2013 12:48:29 +0300
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
	<CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
Message-ID: <CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>

Hi,

Thank you for your answer.
I suppose, IDR stands for Instantaneous Decoding Refresh.
 Please, explain: what do you mean under "set encoder with all idr"?
What settings I need to use?

Andrey.

On Mon, Aug 19, 2013 at 10:48 AM, Anshul maheshwari <
er.anshul.maheshwari at gmail.com> wrote:

>   Please dont top post over here
>
> Try to set encoder with all idr,  that may give you const duration
>
  On Aug 15, 2013 4:59 PM, "Andrey Mochenov" <andrey2067 at gmail.com> wrote:
> >
> > Hi,
> >
> > We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
> > Our purpose is to mux two streams (video and audio) into M3U8 playlist
> using HLS.
> > In addition, we want the duration of every TS segment file be exactly
> 3.0 sec (frame rate is 25 fps).
> > To reach it, we are trying to set several options and properties,
> namely:
> > - segment_time
> > - keyint_min
> > - scenechange_threshold
> > - gop_size
> > - force_key_frames.
> >
> > And our code looks as below:
> >
> > AVCodecContext *codec_ctx = NULL;
> > AVFormatContext *ofmt_ctx = NULL;
> > int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
> >
> > // ofmt_ctx and codec_ctx initialization and filling are OK, but:
> >
> > codec_ctx->time_base.num = 1;
> > codec_ctx->time_base.den = 25 // fps
> >
> > // It seems, that the following three lines have no effect without
> explisit setting of the "hls_time" property
> > codec_ctx->keyint_min = gopSize;       // in FFMpeg application, the
> corresponding option is "-keyint_min 3"
> > codec_ctx->scenechange_threshold = 0;  // in FFMpeg application, the
> corresponding option is "-sc_threshold 0"
> > codec_ctx->gop_size = gopSize;         // in FFMpeg application, the
> corresponding option is "-g 3"
> >
> > ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0,
> AV_OPT_SEARCH_CHILDREN);
> >
> > // Any of the following lines causes "Option not found" error.
> > ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
> AV_OPT_SEARCH_CHILDREN);
> > ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
> AV_OPT_SEARCH_CHILDREN);
> > ret = av_opt_get(ofmt_ctx, "segment_time",  AV_OPT_SEARCH_CHILDREN,
> &str);
> > ret = av_opt_set((ofmt_ctx, "segment_time", "3.0",
> AV_OPT_SEARCH_CHILDREN);
> >
> > Anyway, the TS files durations are different, (~2-3 sec), and not
> EXACTLY 3.0 sec.
> > Our question: What is the best way to solve the problem?
> >
> > Andrey Mochenov.
> >
> >
> > _______________________________________________
> > Libav-user mailing list
> > Libav-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/libav-user
> >
>
> Please dont top post over here
>
> Try to set encoder with all idr,  that may give you const duration
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
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From er.anshul.maheshwari at gmail.com  Mon Aug 19 12:03:37 2013
From: er.anshul.maheshwari at gmail.com (Anshul)
Date: Mon, 19 Aug 2013 15:33:37 +0530
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
	<CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
	<CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
Message-ID: <5211ED79.4070503@gmail.com>

On 08/19/2013 03:18 PM, Andrey Mochenov wrote:
> Hi,
> Thank you for your answer.
> I suppose, IDR stands for Instantaneous Decoding Refresh.
> Please, explain: what do you mean under "set encoder with all idr"?
>
> What settings I need to use?
> Andrey.
> On Mon, Aug 19, 2013 at 10:48 AM, Anshul maheshwari 
> <er.anshul.maheshwari at gmail.com 
> <mailto:er.anshul.maheshwari at gmail.com>> wrote:
>
>     Please dont top post over here
>
>     Try to set encoder with all idr,  that may give you const duration
>
>     On Aug 15, 2013 4:59 PM, "Andrey Mochenov" <andrey2067 at gmail.com
>     <mailto:andrey2067 at gmail.com>> wrote:
>     >
>     > Hi,
>     >
>     > We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
>     > Our purpose is to mux two streams (video and audio) into M3U8
>     playlist using HLS.
>     > In addition, we want the duration of every TS segment file be
>     exactly 3.0 sec (frame rate is 25 fps).
>     > To reach it, we are trying to set several options and
>     properties, namely:
>     > - segment_time
>     > - keyint_min
>     > - scenechange_threshold
>     > - gop_size
>     > - force_key_frames.
>     >
>     > And our code looks as below:
>     >
>     > AVCodecContext *codec_ctx = NULL;
>     > AVFormatContext *ofmt_ctx = NULL;
>     > int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
>     >
>     > // ofmt_ctx and codec_ctx initialization and filling are OK, but:
>     >
>     > codec_ctx->time_base.num = 1;
>     > codec_ctx->time_base.den = 25 // fps
>     >
>     > // It seems, that the following three lines have no effect
>     without explisit setting of the "hls_time" property
>     > codec_ctx->keyint_min = gopSize;       // in FFMpeg application,
>     the corresponding option is "-keyint_min 3"
>     > codec_ctx->scenechange_threshold = 0;  // in FFMpeg application,
>     the corresponding option is "-sc_threshold 0"
>     > codec_ctx->gop_size = gopSize;         // in FFMpeg application,
>     the corresponding option is "-g 3"
>     >
>     > ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0,
>     AV_OPT_SEARCH_CHILDREN);
>     >
>     > // Any of the following lines causes "Option not found" error.
>     > ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
>     AV_OPT_SEARCH_CHILDREN);
>     > ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
>     AV_OPT_SEARCH_CHILDREN);
>     > ret = av_opt_get(ofmt_ctx, "segment_time",
>     AV_OPT_SEARCH_CHILDREN, &str);
>     > ret = av_opt_set((ofmt_ctx, "segment_time", "3.0",
>     AV_OPT_SEARCH_CHILDREN);
>     >
>     > Anyway, the TS files durations are different, (~2-3 sec), and
>     not EXACTLY 3.0 sec.
>     > Our question: What is the best way to solve the problem?
>     >
>     > Andrey Mochenov.
>     >
>     >
>
>     > _______________________________________________
>     > Libav-user mailing list
>     > Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>     > http://ffmpeg.org/mailman/listinfo/libav-user
>     >
>
>     Please dont top post over here
>
>     Try to set encoder with all idr,  that may give you const duration
>
>
>     _______________________________________________
>     Libav-user mailing list
>     Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>     http://ffmpeg.org/mailman/listinfo/libav-user
>
>
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user


*I am reminding you again, please don't top post on this mailing list.

*While cutting the video , segmenter over ride the segement-time if at 
that time  IDR is not the frame.
so if you have less interval between idr, than there are probability 
that segmenter does not over-ride the segment-time. just to verify that 
you are facing the same problem set your encoder IDR interval as 0 or 1,

-Anshul



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From omkarshetkar at gmail.com  Mon Aug 19 13:52:02 2013
From: omkarshetkar at gmail.com (Omkar Shetkar)
Date: Mon, 19 Aug 2013 17:22:02 +0530
Subject: [Libav-user] HLS Client
Message-ID: <CAGnzPO=RszNivzZ78_ZKFDfbP6et2QiZj9oBtdSYORMKT8QBxg@mail.gmail.com>

Hi All,

   I am a beginner to FFMPEG. Currently building a client application for
HLS (Http Live Streaming) using FFMPEG. For this I find some useful
functions in /libavformat/hlsproto.c and other hls related files. But not
sure what are the APIs which are for clients and how to access them for a
simple HLS client. Any small examples or documents will help a lot for this.

Please help in this regard.

-- 
Regards
Omkar V S
http://omkarvs.blogspot.com
Bangalore, India
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From bowljoman at gmail.com  Mon Aug 19 19:01:45 2013
From: bowljoman at gmail.com (Andy Shaules)
Date: Mon, 19 Aug 2013 10:01:45 -0700
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <5211ED79.4070503@gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
	<CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
	<CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
	<5211ED79.4070503@gmail.com>
Message-ID: <52124F79.9020705@gmail.com>

On 8/19/2013 3:03 AM, Anshul wrote:
> On 08/19/2013 03:18 PM, Andrey Mochenov wrote:
>> Hi,
>> Thank you for your answer.
>> I suppose, IDR stands for Instantaneous Decoding Refresh.
>> Please, explain: what do you mean under "set encoder with all idr"?
>>
>> What settings I need to use?
>> Andrey.
>> On Mon, Aug 19, 2013 at 10:48 AM, Anshul maheshwari 
>> <er.anshul.maheshwari at gmail.com 
>> <mailto:er.anshul.maheshwari at gmail.com>> wrote:
>>
>>     Please dont top post over here
>>
>>     Try to set encoder with all idr,  that may give you const duration
>>
>>     On Aug 15, 2013 4:59 PM, "Andrey Mochenov" <andrey2067 at gmail.com
>>     <mailto:andrey2067 at gmail.com>> wrote:
>>     >
>>     > Hi,
>>     >
>>     > We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
>>     > Our purpose is to mux two streams (video and audio) into M3U8
>>     playlist using HLS.
>>     > In addition, we want the duration of every TS segment file be
>>     exactly 3.0 sec (frame rate is 25 fps).
>>     > To reach it, we are trying to set several options and
>>     properties, namely:
>>     > - segment_time
>>     > - keyint_min
>>     > - scenechange_threshold
>>     > - gop_size
>>     > - force_key_frames.
>>     >
>>     > And our code looks as below:
>>     >
>>     > AVCodecContext *codec_ctx = NULL;
>>     > AVFormatContext *ofmt_ctx = NULL;
>>     > int ret = 0, gopSize = (int)(3.0 * 25);   // 3 sec * 25 fps
>>     >
>>     > // ofmt_ctx and codec_ctx initialization and filling are OK, but:
>>     >
>>     > codec_ctx->time_base.num = 1;
>>     > codec_ctx->time_base.den = 25 // fps
>>     >
>>     > // It seems, that the following three lines have no effect
>>     without explisit setting of the "hls_time" property
>>     > codec_ctx->keyint_min = gopSize;       // in FFMpeg
>>     application, the corresponding option is "-keyint_min 3"
>>     > codec_ctx->scenechange_threshold = 0;  // in FFMpeg
>>     application, the corresponding option is "-sc_threshold 0"
>>     > codec_ctx->gop_size = gopSize;         // in FFMpeg
>>     application, the corresponding option is "-g 3"
>>     >
>>     > ret = av_opt_set_double(ofmt_ctx, "hls_time", 3.0,
>>     AV_OPT_SEARCH_CHILDREN);
>>     >
>>     > // Any of the following lines causes "Option not found" error.
>>     > ret = av_opt_set(codec_ctx->priv_data, "profile", "main",
>>     AV_OPT_SEARCH_CHILDREN);
>>     > ret = av_opt_set(codec_ctx->priv_data, "preset", "ultrafast",
>>     AV_OPT_SEARCH_CHILDREN);
>>     > ret = av_opt_get(ofmt_ctx, "segment_time",
>>     AV_OPT_SEARCH_CHILDREN, &str);
>>     > ret = av_opt_set((ofmt_ctx, "segment_time", "3.0",
>>     AV_OPT_SEARCH_CHILDREN);
>>     >
>>     > Anyway, the TS files durations are different, (~2-3 sec), and
>>     not EXACTLY 3.0 sec.
>>     > Our question: What is the best way to solve the problem?
>>     >
>>     > Andrey Mochenov.
>>     >
>>     >
>>
>>     > _______________________________________________
>>     > Libav-user mailing list
>>     > Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>>     > http://ffmpeg.org/mailman/listinfo/libav-user
>>     >
>>
>>     Please dont top post over here
>>
>>     Try to set encoder with all idr,  that may give you const duration
>>
>>
>>     _______________________________________________
>>     Libav-user mailing list
>>     Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>>     http://ffmpeg.org/mailman/listinfo/libav-user
>>
>>
>>
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
> *I am reminding you again, please don't top post on this mailing list.
>
> *While cutting the video , segmenter over ride the segement-time if at 
> that time  IDR is not the frame.
> so if you have less interval between idr, than there are probability 
> that segmenter does not over-ride the segment-time. just to verify 
> that you are facing the same problem set your encoder IDR interval as 
> 0 or 1,
>
> -Anshul
>
>
>
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

It also can help to use a higher version in the m3u8 file list so that 
you can specify decimals for duration.If your segment is 200 mills short 
or longer, the client is able to anticipate gaps, and initiate the next 
stream-pull earlier or later. Seemed to me while segmenting live 
streams, that as long as I did the chop at interval of 4 or 8 seconds, 
that my segments could be shorter or longer and play-out is smooth as 
long as I was honest in the playlist about the actual duration of each 
entry.


Andy


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From kalileo at universalx.net  Mon Aug 19 20:57:08 2013
From: kalileo at universalx.net (Kalileo)
Date: Tue, 20 Aug 2013 01:57:08 +0700
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
	<CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
	<CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
Message-ID: <598E3CB5-21F1-4DB7-88CD-4490D4354239@universalx.net>


On Aug 19, 2013, at 16:48 , Andrey Mochenov wrote:

> Hi,
>  
> Thank you for your answer.
> I suppose, IDR stands for Instantaneous Decoding Refresh.

No, he means key frames, or i-frames, or however you want to call them, as opposed to p-frames or b-frames.

> Please, explain: what do you mean under "set encoder with all idr"? 

He means to set the encoder to have only key frames / i-frames, and no p-frames or b-frames. This would allow the segmenter to cut everywhere.

it is probably good enough to set gop / "max keyframes" and "min keyframes" to the same value, and have this value be the amount of frames after which you want to cut.

From bowljoman at gmail.com  Mon Aug 19 21:42:13 2013
From: bowljoman at gmail.com (Andy Shaules)
Date: Mon, 19 Aug 2013 12:42:13 -0700
Subject: [Libav-user] HLS: Exactly constant segment duration
In-Reply-To: <598E3CB5-21F1-4DB7-88CD-4490D4354239@universalx.net>
References: <CACg7hctNL7dTbGi6z8Qa-jWXWq5wQRk1Q_9+5rYrJLkD2V5-qg@mail.gmail.com>
	<CAJMy86GSYSbTHC-8e1sXte8cvm14RkV8Q43=pf1GAbEH-mBO+A@mail.gmail.com>
	<CACg7hcuigi-qQS9p+H+zeAa17VO7vkpQpBc30MTi+wm0AtAJOQ@mail.gmail.com>
	<598E3CB5-21F1-4DB7-88CD-4490D4354239@universalx.net>
Message-ID: <52127515.2060004@gmail.com>

On 8/19/2013 11:57 AM, Kalileo wrote:
> On Aug 19, 2013, at 16:48 , Andrey Mochenov wrote:
>
>> Hi,
>>   
>> Thank you for your answer.
>> I suppose, IDR stands for Instantaneous Decoding Refresh.
> No, he means key frames, or i-frames, or however you want to call them, as opposed to p-frames or b-frames.
>
>> Please, explain: what do you mean under "set encoder with all idr"?
> He means to set the encoder to have only key frames / i-frames, and no p-frames or b-frames. This would allow the segmenter to cut everywhere.
>
> it is probably good enough to set gop / "max keyframes" and "min keyframes" to the same value, and have this value be the amount of frames after which you want to cut.
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user


I think  i-frame is short for idr frame and is abbreviation for 
'instantaneous decoder refresh' frame because the decoder dumps all 
vector-prediction based content and sets the frame content back in sync 
to real-world input, if you could call it that. Not to be mistaken with 
interframe term.


From joe.flowers at nofreewill.com  Tue Aug 20 00:20:04 2013
From: joe.flowers at nofreewill.com (Joe Flowers)
Date: Mon, 19 Aug 2013 18:20:04 -0400
Subject: [Libav-user] Speex encoding difference only in the very last
	encoded frame
Message-ID: <CA+4=ZEORkK=AMxibcXgRHryeihCa98UQQOz1Gof7mtjCJHQ_6Q@mail.gmail.com>

Hello Everyone,

When I encode a 222,000 byte, s16le RAW audio file with FFMPEG I get a
26,372 byte Speex encoded file - FileA.

When I encode the same audio file with a program I am writing that uses
libavcodec I get a 26,372 byte Speex encoded file - FileB. BUT, 9 bytes in
the middle of the last 38 bytes of encoded data are different between the 2
encoded files (FileA and FileB). All of the other bytes are exactly the
same between the two encoded files.

What makes this weirder to me is that if I decode my Speex encoded file
(FileB) with the other part of my program that uses libavcodec I get the
EXACT same decoded file contents and length as I do if I decode the
FFMPEG-encoded file (FileA) with FFMPEG.

Is this a known anomaly on the last 38 byte frame of encoded Speex data or
have I been staring at this screen for too long today???

Thanks!

Joe
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From nicolas.george at normalesup.org  Tue Aug 20 12:18:54 2013
From: nicolas.george at normalesup.org (Nicolas George)
Date: Tue, 20 Aug 2013 12:18:54 +0200
Subject: [Libav-user] Speex encoding difference only in the very last
	encoded frame
In-Reply-To: <CA+4=ZEORkK=AMxibcXgRHryeihCa98UQQOz1Gof7mtjCJHQ_6Q@mail.gmail.com>
References: <CA+4=ZEORkK=AMxibcXgRHryeihCa98UQQOz1Gof7mtjCJHQ_6Q@mail.gmail.com>
Message-ID: <20130820101854.GA25866@phare.normalesup.org>

Le duodi 2 fructidor, an CCXXI, Joe Flowers a ?crit?:
> When I encode the same audio file with a program I am writing that uses
> libavcodec I get a 26,372 byte Speex encoded file - FileB. BUT, 9 bytes in
> the middle of the last 38 bytes of encoded data are different between the 2
> encoded files (FileA and FileB). All of the other bytes are exactly the
> same between the two encoded files.

I would suggest to add a dump of each frame before encoding, in both your
program and ffmpeg (or just in libavcodec). I suspect something in the
padding / very end of the last frame may be different.

> What makes this weirder to me is that if I decode my Speex encoded file
> (FileB) with the other part of my program that uses libavcodec I get the
> EXACT same decoded file contents and length as I do if I decode the
> FFMPEG-encoded file (FileA) with FFMPEG.

That would be consistent with what I suspect: the difference you see would
manifest on the next decoded frame if there was one.

Regards,

-- 
  Nicolas George
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From joe.flowers at nofreewill.com  Tue Aug 20 12:23:26 2013
From: joe.flowers at nofreewill.com (Joe Flowers)
Date: Tue, 20 Aug 2013 06:23:26 -0400
Subject: [Libav-user] Speex encoding difference only in the very last
 encoded frame
In-Reply-To: <20130820101854.GA25866@phare.normalesup.org>
References: <CA+4=ZEORkK=AMxibcXgRHryeihCa98UQQOz1Gof7mtjCJHQ_6Q@mail.gmail.com>
	<20130820101854.GA25866@phare.normalesup.org>
Message-ID: <CA+4=ZEMxag=mdhpE8vVDjRm9qvCLMU1Z6azhZFAoWan4pGZ7zg@mail.gmail.com>

Thank you Nicolas! That is very helpful!




On Tue, Aug 20, 2013 at 6:18 AM, Nicolas George <
nicolas.george at normalesup.org> wrote:

> Le duodi 2 fructidor, an CCXXI, Joe Flowers a ?crit :
> > When I encode the same audio file with a program I am writing that uses
> > libavcodec I get a 26,372 byte Speex encoded file - FileB. BUT, 9 bytes
> in
> > the middle of the last 38 bytes of encoded data are different between
> the 2
> > encoded files (FileA and FileB). All of the other bytes are exactly the
> > same between the two encoded files.
>
> I would suggest to add a dump of each frame before encoding, in both your
> program and ffmpeg (or just in libavcodec). I suspect something in the
> padding / very end of the last frame may be different.
>
> > What makes this weirder to me is that if I decode my Speex encoded file
> > (FileB) with the other part of my program that uses libavcodec I get the
> > EXACT same decoded file contents and length as I do if I decode the
> > FFMPEG-encoded file (FileA) with FFMPEG.
>
> That would be consistent with what I suspect: the difference you see would
> manifest on the next decoded frame if there was one.
>
> Regards,
>
> --
>   Nicolas George
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
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From ggarra13 at gmail.com  Tue Aug 20 16:12:54 2013
From: ggarra13 at gmail.com (Gonzalo Garramuno)
Date: Tue, 20 Aug 2013 11:12:54 -0300
Subject: [Libav-user] probing a file with ffmpeg libraries
Message-ID: <52137966.9010401@gmail.com>

I would like to probe a file to see if my player can play it (it is a 
valid mov, rm, wmv, avi, etc), but I don't know how to do it with the 
ffmpeg libraries.  I don't care if ffmpeg knows the codec at that point.

From praks411 at gmail.com  Tue Aug 20 16:45:24 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Tue, 20 Aug 2013 07:45:24 -0700 (PDT)
Subject: [Libav-user] "No accelerated colorspace conversion found..." message
Message-ID: <1377009924740-4658414.post@n4.nabble.com>

Hi, 

While encoding video file using ffmpeg I'm getting this warning 
""No accelerated colorspace conversion found from yuv420p to bgr24". 
i think it is coming from sws_scale as I'm using this for conversion. 
Can someone tell me what could be the reason for this warning? 
Though things are working fine. Is it possible just  to disable this warning
from outputting on console? 
I'm using ffmpeg 2.0 on windows 64bits. 

Thanks and Regards, 
Pradeep



--
View this message in context: http://libav-users.943685.n4.nabble.com/No-accelerated-colorspace-conversion-found-message-tp4658414.html
Sent from the libav-users mailing list archive at Nabble.com.

From wseemann at gmail.com  Tue Aug 20 16:59:43 2013
From: wseemann at gmail.com (William Seemann)
Date: Tue, 20 Aug 2013 09:59:43 -0500
Subject: [Libav-user] Seeking by microseconds in FFmpeg
Message-ID: <CAGGP8xj2JYGKLM2kLPheWis+Gbssp0SBtciRk-LsFnyp1fDUuw@mail.gmail.com>

Hello, Is it possible to seek by microseconds using FFmpeg. All of the
examples I've seen rely on milliseconds an I'm unsure how to perform the
conversion. Can someone provide an example? Thanks in advance.*
*
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From praks411 at gmail.com  Tue Aug 20 16:36:40 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Tue, 20 Aug 2013 07:36:40 -0700 (PDT)
Subject: [Libav-user] Warning "No accelerated colorspace conversion found
 from yuv420p to bgr24"
Message-ID: <1377009400436-4658413.post@n4.nabble.com>

Hi,

While encoding video file using ffmpeg I'm getting this warning 
""No accelerated colorspace conversion found from yuv420p to bgr24". 
i think it is coming from sws_scale as I'm using this for conversion.
Can someone tell me what could be the reason for this warning?
Though things are working fine. Is it possible just  to disable this warning
from outputting on console?
I'm using ffmpeg 2.0 on windows 64bits.

Thanks and Regards,
Pradeep



--
View this message in context: http://libav-users.943685.n4.nabble.com/Warning-No-accelerated-colorspace-conversion-found-from-yuv420p-to-bgr24-tp4658413.html
Sent from the libav-users mailing list archive at Nabble.com.

From andrey2067 at gmail.com  Tue Aug 20 18:48:24 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Tue, 20 Aug 2013 19:48:24 +0300
Subject: [Libav-user] Overlay filter inputs: How to assign?
Message-ID: <CACg7hcvBnX2Xb-cxd+js_Vo2jeMvzb3f3cR1tbeuGqZMkgymxw@mail.gmail.com>

Hi everyone,

I want to use the "overlay" filter.
But I do not know, how exactly to assign the "outputs" parameter for the
avfilter_graph_parse() command.
As a result, I get the following error from the avfilter_graph_config()
command:
'Output pad "default" with type video of the filter instance
"input_main_filter"
of buffer not connected to any destination.'

Both standard FFmpeg examples, filtering_video.c and filtering_audio.c use
filters with one input and one output. The "overlay" filter has two inputs
and one output, so use two "buffer" filters for the inputs and one
"buffersink" filter for the ouput.

// Here is a part of main() program
ret = avfilter_graph_create_filter(&buffersrc_ctx, buffersrc,
"input_main_filter", argsStrMain, NULL, filter_graph);
ret = avfilter_graph_create_filter(&bufferovrlay_ctx, bufferovrlay,
"input_overlay_filter", argsStrOvrlay, NULL, filter_graph);
ret = avfilter_graph_create_filter(&buffersink_ctx, buffersink,
"output_filter", NULL, buffersink_params, filter_graph);

// *************** My questions: **********************************
// - What are the right names to be assigned (currently I use "in" and
"overlay")?
// - What is the right way to assign more than one input?

outputs->name = av_strdup("in");
outputs->filter_ctx = buffersrc_ctx;
outputs->pad_idx    = 0;
outputs->next       = outputOvrlay;

outputOvrlay->name = av_strdup("overlay");
outputOvrlay->filter_ctx = bufferovrlay_ctx;
outputOvrlay->pad_idx    = 1;
outputOvrlay->next       = NULL;

// ****************************************************************

inputs->name = av_strdup("out");
inputs->filter_ctx = buffersink_ctx;
inputs->pad_idx    = 0;
inputs->next       = NULL;

ret = avfilter_graph_parse(filter_graph, "overlay", &inputs, &outputs,
NULL);
ret = avfilter_graph_config(filter_graph, NULL);

Please, advise.
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From praks411 at gmail.com  Tue Aug 20 17:11:37 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Tue, 20 Aug 2013 08:11:37 -0700 (PDT)
Subject: [Libav-user] "No accelerated colorspace conversion found..."
	message
In-Reply-To: <1377009924740-4658414.post@n4.nabble.com>
References: <1377009924740-4658414.post@n4.nabble.com>
Message-ID: <1377011497738-4658416.post@n4.nabble.com>

I set av_log_set_level(AV_LOG_QUIET), though most of the message are disabled
but still I'm getting just one message at the start. It normal or this can
be disabled too.




--
View this message in context: http://libav-users.943685.n4.nabble.com/No-accelerated-colorspace-conversion-found-message-tp4658414p4658416.html
Sent from the libav-users mailing list archive at Nabble.com.

From anithasusan at tataelxsi.co.in  Wed Aug 21 07:15:59 2013
From: anithasusan at tataelxsi.co.in (Anitha Susan Varghese)
Date: Wed, 21 Aug 2013 05:15:59 +0000
Subject: [Libav-user] Playing audio file with libavcodec
Message-ID: <25563E537418E342A6DDC83C793113FC100F75AD@HKXPRD0410MB353.apcprd04.prod.outlook.com>

Hi

Myself trying to play an audio file using libavcodec in qt5 .While trying to play i am unable to play the the file.
while decoding the file using av_read_frame()
audioStream->index=0
and packet.stream_index is some higher nos .so avcodec_decode_audio4() is not getting executed.Why is it so?

This is my program. My output is also given below.Please help me in solving this.
-------------------------------------------------------------------------------------------------------------------------------------
#include <QApplication>
#include <QtDebug>
#include <ao/ao.h>

extern "C" {
#include "libavutil/samplefmt.h"
#include "libavcodec/avcodec.h"
#include "libavutil/mathematics.h"
#include "libavutil/avutil.h"
#include "libavformat/avformat.h"
#include "libswscale/swscale.h"
#include "libavutil/dict.h"
#include <ao/ao.h>
#include "libavformat/version.h"
}
#define AVCODEC_MAX_AUDIO_FRAME_SIZE 192000
#define CODEC_TYPE_VIDEO AVMEDIA_TYPE_VIDEO



void die( const char* msg)
{
qDebug() <<  msg ;
}

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    const char* input_filename=argv[1];

    static int driver;
    static ao_device *audio_device;
    int i;
    int stream_id=-1;
    av_register_all();
    avcodec_register_all();
    AVFormatContext* container=NULL;
    AVStream* audioStream=NULL;
       //container=avformat_alloc_context();

     if(avformat_open_input(&container,input_filename,NULL,NULL)<0){
                die("Could not open file");
        }
       else
       die("File Opend");


    if(avformat_find_stream_info(container,NULL)<0){
                die("Could not find file info");
        }


    av_dump_format(container,0,input_filename,false);
    for(i=0; i < container->nb_streams; i++){

        if(container->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO){
                stream_id=i;
                audioStream=container->streams[i];

                qWarning() <<"audioStream"<<audioStream;
                qWarning() <<"Stream id:"<<stream_id;
                 break;
                 }
        }

    if(stream_id==-1){
        die("Could not find Audio Stream");
    }


    AVCodecContext *ctx=container->streams[stream_id]->codec;
    qWarning() <<"Codec ptr:"<< ctx;
    AVCodec *codec=avcodec_find_decoder(ctx->codec_id);
 if(codec==NULL){
        die("cannot find codec!");
   }

  if(avcodec_open2(ctx,codec,NULL)<0){
        die("Codec cannot be opended!");
   }
   else
        qWarning()<<"Codec Opened";


    ao_initialize();
    driver = ao_default_driver_id();
    qWarning()<<"DRIVER ID" <<driver;
   ao_sample_format sformat;
   AVPacket dummy_packet;
   av_read_frame(container,&dummy_packet);
   AVSampleFormat sfmt=ctx->sample_fmt;
//assign device sample rate depend on the input stream

   qWarning()<<"Sample format"<<sfmt;

   if(sfmt==AV_SAMPLE_FMT_U8){
        sformat.bits=8;
        qWarning()<<"Sample format"<<sformat.bits;
   }
   else if(sfmt==AV_SAMPLE_FMT_S16){
        sformat.bits=16;
        qWarning()<<"Sample format"<<sformat.bits;
  }
  else if(sfmt==AV_SAMPLE_FMT_S32){
        sformat.bits=32;
        qWarning()<<"Sample format:AV_SAMPLE_FMT_S32"<<sformat.bits;
  }
else if(sfmt==AV_SAMPLE_FMT_FLT){
        sformat.bits=32;
        qWarning()<<"Sample format:AV_SAMPLE_FMT_FLT"<<sformat.bits;
 else if(sfmt==AV_SAMPLE_FMT_DBL){
        sformat.bits=64;
        qWarning()<<"Sample format"<<sformat.bits;
  }
  else if(sfmt==AV_SAMPLE_FMT_U8P){
        sformat.bits=8;
        qWarning()<<"Sample format"<<sformat.bits;
  }
  else if(sfmt==AV_SAMPLE_FMT_S16P){
        sformat.bits=16;
        qWarning()<<"Sample format"<<sformat.bits;
  }

   else if(sfmt==AV_SAMPLE_FMT_S32P){
        sformat.bits=32;
        qWarning()<<"Sample format:AV_SAMPLE_FMT_S32P"<<sformat.bits;
  }
  else if(sfmt==AV_SAMPLE_FMT_FLTP){
        sformat.bits=32;
        qWarning()<<"Sample format:AV_SAMPLE_FMT_FLTP"<<sformat.bits;
  }
 else if(sfmt==AV_SAMPLE_FMT_DBLP){
        sformat.bits=64;
        qWarning()<<"Sample format"<<sformat.bits;
  }


   sformat.channels=ctx->channels;

  //sformat.channels=2;
  qWarning()<<"Sample format channels"<<sformat.channels;

  sformat.rate=ctx->sample_rate;
  qWarning()<<"Sample format rate"<<sformat.rate;

  sformat.byte_format=AO_FMT_NATIVE;
  qWarning()<<"Sample format "<<sformat.byte_format;
 sformat.matrix=0;

 //seek back to the beginning of stream
  av_seek_frame(container,stream_id,0,AVSEEK_FLAG_ANY);

  audio_device=ao_open_live(driver,&sformat,NULL);
//end of init AO LIB

//data packet read from the stream
  AVPacket packet;
  av_init_packet(&packet);

  int buffer_size=AVCODEC_MAX_AUDIO_FRAME_SIZE+ FF_INPUT_BUFFER_PADDING_SIZE;;

  qWarning()<<"buffersize "<<buffer_size;
  uint8_t buffer[buffer_size];
  packet.data=buffer;
  packet.size =buffer_size;

//frame ,where the decoded data will be written
  AVFrame *frame=avcodec_alloc_frame();
 int len;
  int frameFinished=0;

  qWarning()<<"CODEC"<<audioStream->codec;
  while(av_read_frame(container,&packet)>=0)
  {
//        qWarning()<<audioStream->index;
        if(packet.stream_index==audioStream->index){
        len=avcodec_decode_audio4(ctx,frame,&frameFinished,&packet);
        qWarning()<<"Enterd if loop";
      //  qWarning() <<len;
        if(frameFinished){
//play the decoded byteis
                qWarning()<<"PLAYING";
                ao_play(audio_device, (char*)frame->extended_data[0],frame->linesize[0] );
  }else{
}
}
 avformat_close_input(&container);
  ao_shutdown();
  return app.exec();
}
----------------------------------------------------------------------------------------------------------------------------------
My output
--------------------------------------------------------------------------------------------------------------------                     File Opend
Input #0, ogg, from '/home/tel/Downloads/desktop-login.ogg':
  Duration: 00:00:07.72, start: 0.000000, bitrate: 108 kb/s
    Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 112 kb/s
audioStream 0x88b3f20
Stream id: 0
Codec ptr: 0x88b4100
Codec Opened
DRIVER ID 1
Sample format 3
Sample format:AV_SAMPLE_FMT_FLT 32
Sample format channels 0
Sample format rate 0
Sample format  4
buffersize  192008
CODEC 0x88b4100


--------------------------------------------------------------------------------------------------------------

Regards,
Anitha Susan Varghese

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From kristen.schat at movares.nl  Wed Aug 21 14:43:50 2013
From: kristen.schat at movares.nl (Schat K (Kristen))
Date: Wed, 21 Aug 2013 14:43:50 +0200
Subject: [Libav-user] NVENC encoded frames -> RTSP Unicast (please help)
Message-ID: <142A21F16BFFD54783F64D419C94CD360109DCC4D516@NLUTRVSE01.nl.hr.group>

Hi everyone,

I'm new to ffmpeg so please bare with me if the questions are on the basic side.
I've searched hi and low but all examples I've come across seem to be old and use av_open_input_stream (which no longer seems to exist) or do the exact opposite as to what I want like capturing rtsp stream to file.

I'm currently working with NVIDIA's NVENC h264 hardware encoder, currently I have h264 encoded frames coming from the NVENC encoder.
Each frame is already encoded and in memory I wish to send the frames coming from the encoder on to the network via RTSP Unicast only I have no clue where to start.
I'm currently stumbling blindly around in the ffmpeg codebase, as there appear to be multiple ways to do this?

I've got an output context (do I need an input context as I'm not using a file?)
avformat_alloc_output_context2(&fmt_ctx, NULL, "rtsp", NULL);

As I'm not using a file I realized there are a few special things like AVFMT_NOFILE and AVIOContext, do I really need these?

I think I need to mux the frame in memory to rtsp and send it over the network (if that's the correct terms?)

I also saw AVPacket.. can I just put each frame in an AVPacket and send that somewhere? Somehow I don't think that's the right way to go about it.

I'm also guessing I could do something with AVStream and push each frame into that straight after it's encoded?

Please point me in the right direction, the correct workflow would be handy, maybe even an example RTSP streamer with a file source.

Regards,
Kristen

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From soho123.2012 at gmail.com  Thu Aug 22 14:13:00 2013
From: soho123.2012 at gmail.com (Huang Soho)
Date: Thu, 22 Aug 2013 20:13:00 +0800
Subject: [Libav-user] how to use ffplay to play RTSP/TCP stream
Message-ID: <CAFd2cZWvNMBbLg4Lkkrjwv+6LK+OB8Z6P=0DrTgU1Uwxb9abpQ@mail.gmail.com>

hi All,

As my understanding, ffplay can play RTSP/UDP stream that output from
ffserver.
That I tested, it works fine.
In advance, is it possible to play RTSP/TCP stream by ffplay ?
How to ?


Thanks!
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From nisar.med at gmail.com  Thu Aug 22 14:51:38 2013
From: nisar.med at gmail.com (Nisar Ahmed)
Date: Thu, 22 Aug 2013 17:51:38 +0500
Subject: [Libav-user] muxing h264/aac stream
In-Reply-To: <CAL1+ejjkKHX90dgg=-w9tbQLyqoagNdCJ0k+ArBJnbAOzzs+tg@mail.gmail.com>
References: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>
	<CAJMy86HO_yVqABRe0zFUZZPUj1YXYO-jLXKEUZ5n-6zaxhi7zg@mail.gmail.com>
	<CAL1+ejjkKHX90dgg=-w9tbQLyqoagNdCJ0k+ArBJnbAOzzs+tg@mail.gmail.com>
Message-ID: <CAL1+ejjbJ4pdN49JhupHer+PgvxPvJG+zZsSuFsPPecxr7DaDQ@mail.gmail.com>

Coming back to this issue, I have tested 2 scenarios

a. I am simply setting pts to the timestamp received from encoder and dts
to 0 but the resulting file is showing very large frame rate value.

b. Setting pts to the timestamp received from encoder but this time setting
dts with an increment of 1001 starting from -1001 (2002/-1001, 0/0,
1001/1001, 5005/2002, 3003/3003). The framerate is correct this time but
the quicktime player displays a white frame at the start of the movie. I
investigated this issue further by using libav demuxer sample and the
pts/dts have been changed from what I set and start_time is also not 0. VLC
plays fine but I also want Quicktime player to play the file normally as
well.

The movies created by the software which ships with he encoder shows
correct frame rate and start time of 0, also the pts/dts investigated with
the demuxing sample are in the same sequence as described in the second
scenario.

I really need to understand why my pts/dts are changed by the muxer to
different values, may be it is trying to guess correct values based on the
inputs I provided. Which inputs matter in this kind of scenarios and how
they relate to each other?

Thanks in advance
Nisar


On Sat, Aug 17, 2013 at 11:05 AM, Nisar Ahmed <nisar.med at gmail.com> wrote:

> Thanks for your answer, when I set timestamp of decoder, the frame rate
> jumps up to a very large value
>
> pts/dts = (2002/0, 0/0, 1001/0, 5005/0, 3003/0...)
>
> am I setting the time_base to correct values 1001/30000 and pkt.duration =
> 1001? the timescale of the timestamp is also 30000
>
>
> On Sat, Aug 17, 2013 at 2:10 AM, Anshul maheshwari <
> er.anshul.maheshwari at gmail.com> wrote:
>
>> -
>>
>> On Aug 16, 2013 7:30 PM, "Nisar Ahmed" <nisar.med at gmail.com> wrote:
>> >
>> > I am muxing h264/aac stream to mp4 coming from an encoder and having
>> issues syncing audio and video streams.
>> >
>> > I suspect that the problem is with PTS and DTS but I am not sure what
>> values should i set to properly sync both streams.
>> >
>> > I have set the time_base of video stream's AVCodecContext to 1001/30000
>> and each AVPacket gets a duration of 1001
>> >
>> > I am recieving time stamps from the encoder with each NAL packet which
>> is set as PTS of the AVPacket. the sequence of PTS/DTS I set is (2002/0,
>> 0/1001, 1001/2002, 5005/3003, 3003/4004...)
>> >
>> > Audio stream AVCodecContext sample rate is 48000 and PTS/DTS are simply
>> multiples of 1024 starting from 0 and AVPacket duration is 1024.
>> >
>> > The output movie 's frame rate is 20fps when it should be 29.97fps as
>> it is ntsc.
>> >
>> > Please tell me how to debug this problem and what are the guidelines of
>> creating pts/dts for both video and audio in my case
>> >
>> > _______________________________________________
>> > Libav-user mailing list
>> > Libav-user at ffmpeg.org
>> > http://ffmpeg.org/mailman/listinfo/libav-user
>> >
>> Hi naseer
>>
>> If you are getting timestamp with encoder,  i would suggest "dont try to
>> manuplate that" you may set that same timestamp as presentation timestamp
>> (pts) if your video is realtime then try not to generate B type video frame
>> hence no need to set dts.
>> Whatever clock is set by encoder try generating the pts of audio
>> according to that.
>>
>> @enjoy
>> Anshul
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
>>
>
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From aworldgonewrong at gmail.com  Thu Aug 22 16:07:05 2013
From: aworldgonewrong at gmail.com (John Freeman)
Date: Thu, 22 Aug 2013 15:07:05 +0100
Subject: [Libav-user] RTSP Pause: Times out
Message-ID: <CAARJWsE=rVv095uDNgHOd05Vr3Av51Vv4-xA0hF9Qv7bqsNU5g@mail.gmail.com>

I have an RTSP server that supports the PAUSE command, so in my code I
call av_read_pause and then when I want to resume playback, I
call av_read_play.

However, between the call to pause and the call to play, there is no call
for keep-alive to the server and therefore the connection times out and I
lose the stream.

How can I keep the connection alive?


~ Jay
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From mrfun.china at gmail.com  Thu Aug 22 08:18:14 2013
From: mrfun.china at gmail.com (YIRAN LI)
Date: Thu, 22 Aug 2013 02:18:14 -0400
Subject: [Libav-user] any special settings needed to decoder h.264 encoded
	mp4 in ffmpeg 2.0.1?
Message-ID: <CAN16yyN3Kn=AKbfZucc-Z4_fgvpPG9bL1=8sC=ae625RuYHAhA@mail.gmail.com>

Hi friends,

I'm writing a video converting application which uses ffmpeg dlls on
Windows. We used to use ffmpeg 1.1.3 and now are upgrading to ffmpeg 2.0.1
which was released just days ago.

Buw while compile is successful, when decoding and playing a mp4 files,
seems the video frames returned by avcodec_decode_video2 are not correct
(only first frame is correct, other frames are wrong, just showing dark),
and application 10 seconds after read/decode startes (video duration is 60
seconds)

The configuration I used is quite simple
   --disable-static
   --enable-shared
   --disable-doc
   --disable-ffplay
   --disable-ffprobe
   --disable-ffserver
   --disable-network
   --enable-small
   --enable-memalign-hack
   --disable-bsfs
   --disable-protocol=pipe
   --disable-bzlib
   --disable-devices

and I also added --enable-pthreads

ffmpeg reported lots error messages while decoding/playing.

Because we also develop Mac version, so I'll check if it also crashes Mac
version. I'll be so grateful if
anyone can give a hint on what's wrong with this Windows build.

Great thanks!

Line 282: 00:00:11.154  MAIN  FFMPEG: Format mov,mp4,m4a,3gp,3g2,mj2 probed
with size=2048 and score=100
    Line 284: 00:00:11.154  MAIN  FFMPEG: ISO: File Type Major Brand: mp42
    Line 286: 00:00:11.154  MAIN  FFMPEG: File position before
avformat_find_stream_info() is 37114
    Line 288: 00:00:11.154  MAIN  FFMPEG: All info found
    Line 290: 00:00:11.154  MAIN  FFMPEG: File position after
avformat_find_stream_info() is 73594
    Line 292: 00:00:11.154  MAIN  LFFMPEGSourceManagerVideoBase::Open -
success
    Line 293: 00:00:11.154  MAIN
LFFMPEGSourceManagerVideoBase::GetVideoSource
    Line 295: 00:00:11.170  MAIN  LFFMPEGSourceManagerBase::GetSoundSource
    Line 297: 00:00:11.170  MAIN  LFFMPEGSourceManagerVideoBase::Init
    Line 523: 00:00:14.524  7856  FFMPEG: AVC: nal size -17891602
    Line 525: 00:00:14.524  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 527: 00:00:14.524  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 542: 00:00:14.555  6516  FFMPEG: AVC: nal size -17891602
    Line 544: 00:00:14.555  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 546: 00:00:14.555  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 549: 00:00:14.602  7844  FFMPEG: AVC: nal size -285282562
    Line 551: 00:00:14.602  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 553: 00:00:14.602  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 556: 00:00:14.649  7856  FFMPEG: AVC: nal size -285282562
    Line 558: 00:00:14.649  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 560: 00:00:14.649  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 563: 00:00:14.680  6516  FFMPEG: AVC: nal size -285282562
    Line 565: 00:00:14.680  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 567: 00:00:14.680  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 570: 00:00:14.727  7844  FFMPEG: AVC: nal size -17891602
    Line 572: 00:00:14.727  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 574: 00:00:14.727  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 577: 00:00:14.774  7856  FFMPEG: AVC: nal size -285282562
    Line 579: 00:00:14.774  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 581: 00:00:14.774  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 584: 00:00:14.805  6516  FFMPEG: AVC: nal size -17891602
    Line 586: 00:00:14.820  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 588: 00:00:14.820  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 591: 00:00:14.852  7844  FFMPEG: AVC: nal size -285282562
    Line 593: 00:00:14.852  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 595: 00:00:14.852  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 598: 00:00:14.898  7856  FFMPEG: AVC: nal size -17891602
    Line 600: 00:00:14.898  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 602: 00:00:14.898  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 605: 00:00:14.945  6516  FFMPEG: AVC: nal size -285282562
    Line 607: 00:00:14.945  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 609: 00:00:14.945  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 612: 00:00:14.976  7844  FFMPEG: AVC: nal size -17891602
    Line 614: 00:00:14.976  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 616: 00:00:14.976  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 619: 00:00:15.023  7856  FFMPEG: AVC: nal size -17891602
    Line 621: 00:00:15.023  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 623: 00:00:15.023  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 638: 00:00:15.054  6516  FFMPEG: AVC: nal size -285282562
    Line 640: 00:00:15.054  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 642: 00:00:15.054  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 645: 00:00:15.101  7844  FFMPEG: AVC: nal size -17891602
    Line 647: 00:00:15.101  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 649: 00:00:15.101  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 652: 00:00:15.148  7856  FFMPEG: AVC: nal size -17891602
    Line 654: 00:00:15.148  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 656: 00:00:15.148  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 659: 00:00:15.179  6516  FFMPEG: AVC: nal size -285282562
    Line 661: 00:00:15.179  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 663: 00:00:15.179  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 666: 00:00:15.226  7844  FFMPEG: AVC: nal size -17891602
    Line 668: 00:00:15.226  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 670: 00:00:15.226  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 673: 00:00:15.273  7856  FFMPEG: AVC: nal size -285282562
    Line 675: 00:00:15.273  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 677: 00:00:15.273  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 680: 00:00:15.304  6516  FFMPEG: AVC: nal size -285282562
    Line 682: 00:00:15.304  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 684: 00:00:15.320  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 687: 00:00:15.351  7844  FFMPEG: AVC: nal size -17891602
    Line 689: 00:00:15.351  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 691: 00:00:15.351  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 694: 00:00:15.398  7856  FFMPEG: AVC: nal size -17891602
    Line 696: 00:00:15.398  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 698: 00:00:15.398  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 701: 00:00:15.444  6516  FFMPEG: AVC: nal size -17891602
    Line 703: 00:00:15.444  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 705: 00:00:15.444  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 708: 00:00:15.476  7844  FFMPEG: AVC: nal size -17891602
    Line 710: 00:00:15.476  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 712: 00:00:15.476  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 715: 00:00:15.522  7856  FFMPEG: AVC: nal size -17891602
    Line 717: 00:00:15.522  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 719: 00:00:15.522  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 722: 00:00:15.554  6516  FFMPEG: AVC: nal size -285282562
    Line 724: 00:00:15.554  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 726: 00:00:15.554  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 729: 00:00:15.600  7844  FFMPEG: AVC: nal size -17891602
    Line 731: 00:00:15.600  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 733: 00:00:15.600  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 748: 00:00:15.647  7856  FFMPEG: AVC: nal size -285282562
    Line 750: 00:00:15.647  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 752: 00:00:15.647  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 755: 00:00:15.678  6516  FFMPEG: AVC: nal size -285282562
    Line 757: 00:00:15.678  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 759: 00:00:15.678  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 762: 00:00:15.725  7844  FFMPEG: AVC: nal size -17891602
    Line 764: 00:00:15.725  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 766: 00:00:15.725  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 769: 00:00:15.772  7856  FFMPEG: AVC: nal size -285282562
    Line 771: 00:00:15.772  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 773: 00:00:15.772  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 776: 00:00:15.803  6516  FFMPEG: AVC: nal size -285282562
    Line 778: 00:00:15.819  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 780: 00:00:15.819  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 783: 00:00:15.850  7844  FFMPEG: AVC: nal size -17891602
    Line 785: 00:00:15.850  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 787: 00:00:15.850  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 790: 00:00:15.897  7856  FFMPEG: AVC: nal size -285282562
    Line 792: 00:00:15.897  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 794: 00:00:15.897  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 797: 00:00:15.944  6516  FFMPEG: AVC: nal size -285282562
    Line 799: 00:00:15.944  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 801: 00:00:15.944  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 804: 00:00:15.975  7844  FFMPEG: AVC: nal size -285282562
    Line 806: 00:00:15.975  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 808: 00:00:15.975  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 811: 00:00:16.022  7856  FFMPEG: AVC: nal size -285282562
    Line 813: 00:00:16.022  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 815: 00:00:16.022  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 818: 00:00:16.068  6516  FFMPEG: AVC: nal size -17891602
    Line 820: 00:00:16.068  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 822: 00:00:16.068  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 825: 00:00:16.100  7844  FFMPEG: AVC: nal size -17891602
    Line 827: 00:00:16.100  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 829: 00:00:16.100  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 833: 00:00:16.146  7856  FFMPEG: AVC: nal size -17891602
    Line 836: 00:00:16.146  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 838: 00:00:16.146  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 851: 00:00:16.178  6516  FFMPEG: AVC: nal size -285282562
    Line 853: 00:00:16.178  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 855: 00:00:16.193  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 858: 00:00:16.224  7844  FFMPEG: AVC: nal size -17891602
    Line 860: 00:00:16.224  7844  FFMPEG: Cannot use next picture in error
concealment Line 282: 00:00:11.154  MAIN  FFMPEG: Format
mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    Line 284: 00:00:11.154  MAIN  FFMPEG: ISO: File Type Major Brand: mp42
    Line 286: 00:00:11.154  MAIN  FFMPEG: File position before
avformat_find_stream_info() is 37114
    Line 288: 00:00:11.154  MAIN  FFMPEG: All info found
    Line 290: 00:00:11.154  MAIN  FFMPEG: File position after
avformat_find_stream_info() is 73594
    Line 292: 00:00:11.154  MAIN  LFFMPEGSourceManagerVideoBase::Open -
success
    Line 293: 00:00:11.154  MAIN
LFFMPEGSourceManagerVideoBase::GetVideoSource
    Line 295: 00:00:11.170  MAIN  LFFMPEGSourceManagerBase::GetSoundSource
    Line 297: 00:00:11.170  MAIN  LFFMPEGSourceManagerVideoBase::Init
    Line 523: 00:00:14.524  7856  FFMPEG: AVC: nal size -17891602
    Line 525: 00:00:14.524  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 527: 00:00:14.524  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 542: 00:00:14.555  6516  FFMPEG: AVC: nal size -17891602
    Line 544: 00:00:14.555  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 546: 00:00:14.555  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 549: 00:00:14.602  7844  FFMPEG: AVC: nal size -285282562
    Line 551: 00:00:14.602  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 553: 00:00:14.602  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 556: 00:00:14.649  7856  FFMPEG: AVC: nal size -285282562
    Line 558: 00:00:14.649  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 560: 00:00:14.649  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 563: 00:00:14.680  6516  FFMPEG: AVC: nal size -285282562
    Line 565: 00:00:14.680  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 567: 00:00:14.680  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 570: 00:00:14.727  7844  FFMPEG: AVC: nal size -17891602
    Line 572: 00:00:14.727  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 574: 00:00:14.727  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 577: 00:00:14.774  7856  FFMPEG: AVC: nal size -285282562
    Line 579: 00:00:14.774  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 581: 00:00:14.774  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 584: 00:00:14.805  6516  FFMPEG: AVC: nal size -17891602
    Line 586: 00:00:14.820  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 588: 00:00:14.820  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 591: 00:00:14.852  7844  FFMPEG: AVC: nal size -285282562
    Line 593: 00:00:14.852  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 595: 00:00:14.852  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 598: 00:00:14.898  7856  FFMPEG: AVC: nal size -17891602
    Line 600: 00:00:14.898  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 602: 00:00:14.898  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 605: 00:00:14.945  6516  FFMPEG: AVC: nal size -285282562
    Line 607: 00:00:14.945  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 609: 00:00:14.945  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 612: 00:00:14.976  7844  FFMPEG: AVC: nal size -17891602
    Line 614: 00:00:14.976  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 616: 00:00:14.976  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 619: 00:00:15.023  7856  FFMPEG: AVC: nal size -17891602
    Line 621: 00:00:15.023  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 623: 00:00:15.023  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 638: 00:00:15.054  6516  FFMPEG: AVC: nal size -285282562
    Line 640: 00:00:15.054  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 642: 00:00:15.054  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 645: 00:00:15.101  7844  FFMPEG: AVC: nal size -17891602
    Line 647: 00:00:15.101  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 649: 00:00:15.101  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 652: 00:00:15.148  7856  FFMPEG: AVC: nal size -17891602
    Line 654: 00:00:15.148  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 656: 00:00:15.148  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 659: 00:00:15.179  6516  FFMPEG: AVC: nal size -285282562
    Line 661: 00:00:15.179  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 663: 00:00:15.179  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 666: 00:00:15.226  7844  FFMPEG: AVC: nal size -17891602
    Line 668: 00:00:15.226  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 670: 00:00:15.226  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 673: 00:00:15.273  7856  FFMPEG: AVC: nal size -285282562
    Line 675: 00:00:15.273  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 677: 00:00:15.273  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 680: 00:00:15.304  6516  FFMPEG: AVC: nal size -285282562
    Line 682: 00:00:15.304  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 684: 00:00:15.320  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 687: 00:00:15.351  7844  FFMPEG: AVC: nal size -17891602
    Line 689: 00:00:15.351  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 691: 00:00:15.351  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 694: 00:00:15.398  7856  FFMPEG: AVC: nal size -17891602
    Line 696: 00:00:15.398  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 698: 00:00:15.398  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 701: 00:00:15.444  6516  FFMPEG: AVC: nal size -17891602
    Line 703: 00:00:15.444  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 705: 00:00:15.444  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 708: 00:00:15.476  7844  FFMPEG: AVC: nal size -17891602
    Line 710: 00:00:15.476  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 712: 00:00:15.476  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 715: 00:00:15.522  7856  FFMPEG: AVC: nal size -17891602
    Line 717: 00:00:15.522  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 719: 00:00:15.522  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 722: 00:00:15.554  6516  FFMPEG: AVC: nal size -285282562
    Line 724: 00:00:15.554  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 726: 00:00:15.554  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 729: 00:00:15.600  7844  FFMPEG: AVC: nal size -17891602
    Line 731: 00:00:15.600  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 733: 00:00:15.600  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 748: 00:00:15.647  7856  FFMPEG: AVC: nal size -285282562
    Line 750: 00:00:15.647  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 752: 00:00:15.647  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 755: 00:00:15.678  6516  FFMPEG: AVC: nal size -285282562
    Line 757: 00:00:15.678  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 759: 00:00:15.678  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 762: 00:00:15.725  7844  FFMPEG: AVC: nal size -17891602
    Line 764: 00:00:15.725  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 766: 00:00:15.725  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 769: 00:00:15.772  7856  FFMPEG: AVC: nal size -285282562
    Line 771: 00:00:15.772  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 773: 00:00:15.772  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 776: 00:00:15.803  6516  FFMPEG: AVC: nal size -285282562
    Line 778: 00:00:15.819  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 780: 00:00:15.819  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 783: 00:00:15.850  7844  FFMPEG: AVC: nal size -17891602
    Line 785: 00:00:15.850  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 787: 00:00:15.850  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 790: 00:00:15.897  7856  FFMPEG: AVC: nal size -285282562
    Line 792: 00:00:15.897  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 794: 00:00:15.897  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 797: 00:00:15.944  6516  FFMPEG: AVC: nal size -285282562
    Line 799: 00:00:15.944  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 801: 00:00:15.944  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 804: 00:00:15.975  7844  FFMPEG: AVC: nal size -285282562
    Line 806: 00:00:15.975  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 808: 00:00:15.975  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 811: 00:00:16.022  7856  FFMPEG: AVC: nal size -285282562
    Line 813: 00:00:16.022  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 815: 00:00:16.022  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 818: 00:00:16.068  6516  FFMPEG: AVC: nal size -17891602
    Line 820: 00:00:16.068  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 822: 00:00:16.068  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 825: 00:00:16.100  7844  FFMPEG: AVC: nal size -17891602
    Line 827: 00:00:16.100  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 829: 00:00:16.100  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 833: 00:00:16.146  7856  FFMPEG: AVC: nal size -17891602
    Line 836: 00:00:16.146  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 838: 00:00:16.146  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 851: 00:00:16.178  6516  FFMPEG: AVC: nal size -285282562
    Line 853: 00:00:16.178  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 855: 00:00:16.193  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 858: 00:00:16.224  7844  FFMPEG: AVC: nal size -17891602
    Line 860: 00:00:16.224  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 862: 00:00:16.224  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 865: 00:00:16.271  7856  FFMPEG: AVC: nal size -285282562
    Line 867: 00:00:16.271  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 869: 00:00:16.271  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 872: 00:00:16.318  6516  FFMPEG: AVC: nal size -285282562
    Line 874: 00:00:16.318  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 876: 00:00:16.318  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 879: 00:00:16.349  7844  FFMPEG: AVC: nal size -285282562
    Line 881: 00:00:16.349  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 883: 00:00:16.349  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 886: 00:00:16.396  7856  FFMPEG: AVC: nal size -285282562
    Line 888: 00:00:16.396  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 890: 00:00:16.396  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 893: 00:00:16.443  6516  FFMPEG: AVC: nal size -285282562
    Line 895: 00:00:16.443  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 897: 00:00:16.443  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 900: 00:00:16.474  7844  FFMPEG: AVC: nal size -17891602
    Line 902: 00:00:16.474  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 904: 00:00:16.474  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 907: 00:00:16.521  7856  FFMPEG: AVC: nal size -285282562
    Line 909: 00:00:16.521  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 911: 00:00:16.521  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 926: 00:00:16.568  6516  FFMPEG: AVC: nal size -285282562
    Line 928: 00:00:16.568  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 930: 00:00:16.568  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 933: 00:00:16.599  7844  FFMPEG: AVC: nal size -17891602
    Line 935: 00:00:16.599  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 937: 00:00:16.599  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 940: 00:00:16.646  7856  FFMPEG: AVC: nal size -17891602
    Line 942: 00:00:16.646  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 944: 00:00:16.646  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 947: 00:00:16.692  6516  FFMPEG: AVC: nal size -285282562
    Line 949: 00:00:16.692  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 951: 00:00:16.692  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 954: 00:00:16.724  7844  FFMPEG: AVC: nal size -17891602
    Line 956: 00:00:16.724  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 958: 00:00:16.739  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 961: 00:00:16.770  7856  FFMPEG: AVC: nal size -285282562
    Line 963: 00:00:16.770  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 965: 00:00:16.770  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 968: 00:00:16.802  6516  FFMPEG: AVC: nal size -17891602
    Line 970: 00:00:16.817  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 972: 00:00:16.817  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 975: 00:00:16.848  7844  FFMPEG: AVC: nal size -285282562
    Line 977: 00:00:16.848  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 979: 00:00:16.848  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 982: 00:00:16.895  7856  FFMPEG: AVC: nal size -17891602
    Line 984: 00:00:16.895  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 986: 00:00:16.895  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 989: 00:00:16.926  6516  FFMPEG: AVC: nal size -285282562
    Line 991: 00:00:16.942  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 993: 00:00:16.942  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 996: 00:00:16.973  7844  FFMPEG: AVC: nal size -17891602
    Line 998: 00:00:16.973  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1000: 00:00:16.973  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1003: 00:00:17.020  7856  FFMPEG: AVC: nal size -285282562
    Line 1005: 00:00:17.020  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1007: 00:00:17.020  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1022: 00:00:17.067  6516  FFMPEG: AVC: nal size -17891602
    Line 1024: 00:00:17.067  6516  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in I frame
    Line 1027: 00:00:17.098  7844  FFMPEG: AVC: nal size -17891602
    Line 1029: 00:00:17.098  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1031: 00:00:17.098  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1034: 00:00:17.145  7856  FFMPEG: AVC: nal size -285282562
    Line 1036: 00:00:17.145  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1038: 00:00:17.145  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1041: 00:00:17.192  6516  FFMPEG: AVC: nal size -17891602
    Line 1043: 00:00:17.192  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1045: 00:00:17.192  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1048: 00:00:17.223  7844  FFMPEG: AVC: nal size -17891602
    Line 1050: 00:00:17.238  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1052: 00:00:17.238  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1055: 00:00:17.270  7856  FFMPEG: AVC: nal size -17891602
    Line 1057: 00:00:17.270  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1059: 00:00:17.270  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1062: 00:00:17.316  6516  FFMPEG: AVC: nal size -17891602
    Line 1064: 00:00:17.316  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1066: 00:00:17.316  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1069: 00:00:17.348  7844  FFMPEG: AVC: nal size -285282562
    Line 1071: 00:00:17.348  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1073: 00:00:17.348  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1076: 00:00:17.394  7856  FFMPEG: AVC: nal size -17891602
    Line 1078: 00:00:17.394  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1080: 00:00:17.394  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1083: 00:00:17.441  6516  FFMPEG: AVC: nal size -285282562
    Line 1085: 00:00:17.441  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1087: 00:00:17.441  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1090: 00:00:17.472  7844  FFMPEG: AVC: nal size -17891602
    Line 1092: 00:00:17.472  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1094: 00:00:17.472  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1097: 00:00:17.519  7856  FFMPEG: AVC: nal size -17891602
    Line 1099: 00:00:17.519  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1101: 00:00:17.519  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1104: 00:00:17.566  6516  FFMPEG: AVC: nal size -17891602
    Line 1106: 00:00:17.566  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1108: 00:00:17.566  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1111: 00:00:17.597  7844  FFMPEG: AVC: nal size -17891602
    Line 1113: 00:00:17.597  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1115: 00:00:17.597  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1121: 00:00:17.644  7856  FFMPEG: AVC: nal size -572662307
    Line 1124: 00:00:17.660  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1127: 00:00:17.660  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1137: 00:00:17.691  6516  FFMPEG: AVC: nal size -285282562
    Line 1139: 00:00:17.691  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1141: 00:00:17.691  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1144: 00:00:17.722  7844  FFMPEG: AVC: nal size -285282562
    Line 1146: 00:00:17.738  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1148: 00:00:17.738  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1151: 00:00:17.769  7856  FFMPEG: AVC: nal size -285282562
    Line 1153: 00:00:17.769  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1155: 00:00:17.769  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1158: 00:00:17.816  6516  FFMPEG: AVC: nal size -285282562
    Line 1160: 00:00:17.816  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1162: 00:00:17.816  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1165: 00:00:17.862  7844  FFMPEG: AVC: nal size -285282562
    Line 1167: 00:00:17.862  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1169: 00:00:17.862  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1172: 00:00:17.894  7856  FFMPEG: AVC: nal size -285282562
    Line 1174: 00:00:17.894  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1176: 00:00:17.894  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1179: 00:00:17.940  6516  FFMPEG: AVC: nal size -17891602
    Line 1181: 00:00:17.940  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1183: 00:00:17.940  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1186: 00:00:17.972  7844  FFMPEG: AVC: nal size -17891602
    Line 1188: 00:00:17.972  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1190: 00:00:17.972  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1193: 00:00:18.018  7856  FFMPEG: AVC: nal size -285282562
    Line 1195: 00:00:18.018  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1197: 00:00:18.018  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1200: 00:00:18.065  6516  FFMPEG: AVC: nal size -17891602
    Line 1202: 00:00:18.065  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1204: 00:00:18.065  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1207: 00:00:18.096  7844  FFMPEG: AVC: nal size -285282562
    Line 1209: 00:00:18.096  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1211: 00:00:18.096  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1215: 00:00:18.143  7856  FFMPEG: AVC: nal size -285282562
    Line 1218: 00:00:18.143  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1221: 00:00:18.143  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1233: 00:00:18.190  6516  FFMPEG: AVC: nal size -285282562
    Line 1235: 00:00:18.190  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1237: 00:00:18.190  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1240: 00:00:18.221  7844  FFMPEG: AVC: nal size -285282562
    Line 1242: 00:00:18.221  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1244: 00:00:18.237  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1247: 00:00:18.268  7856  FFMPEG: AVC: nal size -285282562
    Line 1249: 00:00:18.268  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1251: 00:00:18.268  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1254: 00:00:18.315  6516  FFMPEG: AVC: nal size -285282562
    Line 1256: 00:00:18.315  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1258: 00:00:18.315  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1261: 00:00:18.346  7844  FFMPEG: AVC: nal size -17891602
    Line 1263: 00:00:18.362  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1265: 00:00:18.362  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1268: 00:00:18.393  7856  FFMPEG: AVC: nal size -285282562
    Line 1270: 00:00:18.393  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1272: 00:00:18.393  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1275: 00:00:18.440  6516  FFMPEG: AVC: nal size -17891602
    Line 1277: 00:00:18.440  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1279: 00:00:18.440  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1282: 00:00:18.486  7844  FFMPEG: AVC: nal size -285282562
    Line 1284: 00:00:18.486  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1286: 00:00:18.486  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1289: 00:00:18.518  7856  FFMPEG: AVC: nal size -17891602
    Line 1291: 00:00:18.518  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1293: 00:00:18.518  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1308: 00:00:18.564  6516  FFMPEG: AVC: nal size -17891602
    Line 1310: 00:00:18.564  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1312: 00:00:18.564  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1315: 00:00:18.596  7844  FFMPEG: AVC: nal size -17891602
    Line 1317: 00:00:18.596  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1319: 00:00:18.596  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1322: 00:00:18.642  7856  FFMPEG: AVC: nal size -285282562
    Line 1324: 00:00:18.642  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1326: 00:00:18.642  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1329: 00:00:18.689  6516  FFMPEG: AVC: nal size -17891602
    Line 1331: 00:00:18.689  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1333: 00:00:18.689  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1336: 00:00:18.720  7844  FFMPEG: AVC: nal size -17891602
    Line 1338: 00:00:18.736  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1340: 00:00:18.736  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1343: 00:00:18.767  7856  FFMPEG: AVC: nal size -17891602
    Line 1345: 00:00:18.767  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1347: 00:00:18.767  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1350: 00:00:18.814  6516  FFMPEG: AVC: nal size -17891602
    Line 1352: 00:00:18.814  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 862: 00:00:16.224  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 865: 00:00:16.271  7856  FFMPEG: AVC: nal size -285282562
    Line 867: 00:00:16.271  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 869: 00:00:16.271  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 872: 00:00:16.318  6516  FFMPEG: AVC: nal size -285282562
    Line 874: 00:00:16.318  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 876: 00:00:16.318  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 879: 00:00:16.349  7844  FFMPEG: AVC: nal size -285282562
    Line 881: 00:00:16.349  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 883: 00:00:16.349  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 886: 00:00:16.396  7856  FFMPEG: AVC: nal size -285282562
    Line 888: 00:00:16.396  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 890: 00:00:16.396  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 893: 00:00:16.443  6516  FFMPEG: AVC: nal size -285282562
    Line 895: 00:00:16.443  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 897: 00:00:16.443  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 900: 00:00:16.474  7844  FFMPEG: AVC: nal size -17891602
    Line 902: 00:00:16.474  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 904: 00:00:16.474  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 907: 00:00:16.521  7856  FFMPEG: AVC: nal size -285282562
    Line 909: 00:00:16.521  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 911: 00:00:16.521  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 926: 00:00:16.568  6516  FFMPEG: AVC: nal size -285282562
    Line 928: 00:00:16.568  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 930: 00:00:16.568  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 933: 00:00:16.599  7844  FFMPEG: AVC: nal size -17891602
    Line 935: 00:00:16.599  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 937: 00:00:16.599  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 940: 00:00:16.646  7856  FFMPEG: AVC: nal size -17891602
    Line 942: 00:00:16.646  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 944: 00:00:16.646  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 947: 00:00:16.692  6516  FFMPEG: AVC: nal size -285282562
    Line 949: 00:00:16.692  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 951: 00:00:16.692  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 954: 00:00:16.724  7844  FFMPEG: AVC: nal size -17891602
    Line 956: 00:00:16.724  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 958: 00:00:16.739  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 961: 00:00:16.770  7856  FFMPEG: AVC: nal size -285282562
    Line 963: 00:00:16.770  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 965: 00:00:16.770  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 968: 00:00:16.802  6516  FFMPEG: AVC: nal size -17891602
    Line 970: 00:00:16.817  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 972: 00:00:16.817  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 975: 00:00:16.848  7844  FFMPEG: AVC: nal size -285282562
    Line 977: 00:00:16.848  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 979: 00:00:16.848  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 982: 00:00:16.895  7856  FFMPEG: AVC: nal size -17891602
    Line 984: 00:00:16.895  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 986: 00:00:16.895  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 989: 00:00:16.926  6516  FFMPEG: AVC: nal size -285282562
    Line 991: 00:00:16.942  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 993: 00:00:16.942  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 996: 00:00:16.973  7844  FFMPEG: AVC: nal size -17891602
    Line 998: 00:00:16.973  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1000: 00:00:16.973  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1003: 00:00:17.020  7856  FFMPEG: AVC: nal size -285282562
    Line 1005: 00:00:17.020  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1007: 00:00:17.020  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1022: 00:00:17.067  6516  FFMPEG: AVC: nal size -17891602
    Line 1024: 00:00:17.067  6516  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in I frame
    Line 1027: 00:00:17.098  7844  FFMPEG: AVC: nal size -17891602
    Line 1029: 00:00:17.098  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1031: 00:00:17.098  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1034: 00:00:17.145  7856  FFMPEG: AVC: nal size -285282562
    Line 1036: 00:00:17.145  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1038: 00:00:17.145  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1041: 00:00:17.192  6516  FFMPEG: AVC: nal size -17891602
    Line 1043: 00:00:17.192  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1045: 00:00:17.192  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1048: 00:00:17.223  7844  FFMPEG: AVC: nal size -17891602
    Line 1050: 00:00:17.238  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1052: 00:00:17.238  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1055: 00:00:17.270  7856  FFMPEG: AVC: nal size -17891602
    Line 1057: 00:00:17.270  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1059: 00:00:17.270  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1062: 00:00:17.316  6516  FFMPEG: AVC: nal size -17891602
    Line 1064: 00:00:17.316  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1066: 00:00:17.316  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1069: 00:00:17.348  7844  FFMPEG: AVC: nal size -285282562
    Line 1071: 00:00:17.348  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1073: 00:00:17.348  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1076: 00:00:17.394  7856  FFMPEG: AVC: nal size -17891602
    Line 1078: 00:00:17.394  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1080: 00:00:17.394  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1083: 00:00:17.441  6516  FFMPEG: AVC: nal size -285282562
    Line 1085: 00:00:17.441  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1087: 00:00:17.441  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1090: 00:00:17.472  7844  FFMPEG: AVC: nal size -17891602
    Line 1092: 00:00:17.472  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1094: 00:00:17.472  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1097: 00:00:17.519  7856  FFMPEG: AVC: nal size -17891602
    Line 1099: 00:00:17.519  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1101: 00:00:17.519  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1104: 00:00:17.566  6516  FFMPEG: AVC: nal size -17891602
    Line 1106: 00:00:17.566  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1108: 00:00:17.566  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1111: 00:00:17.597  7844  FFMPEG: AVC: nal size -17891602
    Line 1113: 00:00:17.597  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1115: 00:00:17.597  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1121: 00:00:17.644  7856  FFMPEG: AVC: nal size -572662307
    Line 1124: 00:00:17.660  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1127: 00:00:17.660  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1137: 00:00:17.691  6516  FFMPEG: AVC: nal size -285282562
    Line 1139: 00:00:17.691  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1141: 00:00:17.691  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1144: 00:00:17.722  7844  FFMPEG: AVC: nal size -285282562
    Line 1146: 00:00:17.738  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1148: 00:00:17.738  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1151: 00:00:17.769  7856  FFMPEG: AVC: nal size -285282562
    Line 1153: 00:00:17.769  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1155: 00:00:17.769  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1158: 00:00:17.816  6516  FFMPEG: AVC: nal size -285282562
    Line 1160: 00:00:17.816  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1162: 00:00:17.816  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1165: 00:00:17.862  7844  FFMPEG: AVC: nal size -285282562
    Line 1167: 00:00:17.862  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1169: 00:00:17.862  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1172: 00:00:17.894  7856  FFMPEG: AVC: nal size -285282562
    Line 1174: 00:00:17.894  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1176: 00:00:17.894  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1179: 00:00:17.940  6516  FFMPEG: AVC: nal size -17891602
    Line 1181: 00:00:17.940  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1183: 00:00:17.940  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1186: 00:00:17.972  7844  FFMPEG: AVC: nal size -17891602
    Line 1188: 00:00:17.972  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1190: 00:00:17.972  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1193: 00:00:18.018  7856  FFMPEG: AVC: nal size -285282562
    Line 1195: 00:00:18.018  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1197: 00:00:18.018  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1200: 00:00:18.065  6516  FFMPEG: AVC: nal size -17891602
    Line 1202: 00:00:18.065  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1204: 00:00:18.065  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1207: 00:00:18.096  7844  FFMPEG: AVC: nal size -285282562
    Line 1209: 00:00:18.096  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1211: 00:00:18.096  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1215: 00:00:18.143  7856  FFMPEG: AVC: nal size -285282562
    Line 1218: 00:00:18.143  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1221: 00:00:18.143  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1233: 00:00:18.190  6516  FFMPEG: AVC: nal size -285282562
    Line 1235: 00:00:18.190  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1237: 00:00:18.190  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1240: 00:00:18.221  7844  FFMPEG: AVC: nal size -285282562
    Line 1242: 00:00:18.221  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1244: 00:00:18.237  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1247: 00:00:18.268  7856  FFMPEG: AVC: nal size -285282562
    Line 1249: 00:00:18.268  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1251: 00:00:18.268  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1254: 00:00:18.315  6516  FFMPEG: AVC: nal size -285282562
    Line 1256: 00:00:18.315  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1258: 00:00:18.315  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1261: 00:00:18.346  7844  FFMPEG: AVC: nal size -17891602
    Line 1263: 00:00:18.362  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1265: 00:00:18.362  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1268: 00:00:18.393  7856  FFMPEG: AVC: nal size -285282562
    Line 1270: 00:00:18.393  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1272: 00:00:18.393  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1275: 00:00:18.440  6516  FFMPEG: AVC: nal size -17891602
    Line 1277: 00:00:18.440  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1279: 00:00:18.440  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1282: 00:00:18.486  7844  FFMPEG: AVC: nal size -285282562
    Line 1284: 00:00:18.486  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1286: 00:00:18.486  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1289: 00:00:18.518  7856  FFMPEG: AVC: nal size -17891602
    Line 1291: 00:00:18.518  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1293: 00:00:18.518  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1308: 00:00:18.564  6516  FFMPEG: AVC: nal size -17891602
    Line 1310: 00:00:18.564  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1312: 00:00:18.564  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1315: 00:00:18.596  7844  FFMPEG: AVC: nal size -17891602
    Line 1317: 00:00:18.596  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1319: 00:00:18.596  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1322: 00:00:18.642  7856  FFMPEG: AVC: nal size -285282562
    Line 1324: 00:00:18.642  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1326: 00:00:18.642  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1329: 00:00:18.689  6516  FFMPEG: AVC: nal size -17891602
    Line 1331: 00:00:18.689  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1333: 00:00:18.689  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1336: 00:00:18.720  7844  FFMPEG: AVC: nal size -17891602
    Line 1338: 00:00:18.736  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1340: 00:00:18.736  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1343: 00:00:18.767  7856  FFMPEG: AVC: nal size -17891602
    Line 1345: 00:00:18.767  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1347: 00:00:18.767  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1350: 00:00:18.814  6516  FFMPEG: AVC: nal size -17891602
    Line 1352: 00:00:18.814  6516  FFMPEG: Cannot use next picture in error
concealment
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From mrfun.china at gmail.com  Thu Aug 22 09:08:22 2013
From: mrfun.china at gmail.com (YIRAN LI)
Date: Thu, 22 Aug 2013 03:08:22 -0400
Subject: [Libav-user] Fwd: any special settings needed to decoder h.264
 encoded mp4 in ffmpeg 2.0.1?
In-Reply-To: <CAN16yyN3Kn=AKbfZucc-Z4_fgvpPG9bL1=8sC=ae625RuYHAhA@mail.gmail.com>
References: <CAN16yyN3Kn=AKbfZucc-Z4_fgvpPG9bL1=8sC=ae625RuYHAhA@mail.gmail.com>
Message-ID: <CAN16yyMYnXUMjo1dNcU+DS+=ngtACNfvLV3ZFdnrabXgyW8_-Q@mail.gmail.com>

Hi friends,

I've found that it happens because I set AVCodecContext.thread_count = 3
before opening the codec, setting it with 2 also will make decoded frame
wrong and finally crash.

I'm compiling on Win7 using cygwin, GCC version is 4.5.3

Does anyone know if it's related to --enable-pthreads

---------- Forwarded message ----------
From: YIRAN LI <mrfun.china at gmail.com>
Date: 2013/8/22
Subject: any special settings needed to decoder h.264 encoded mp4 in ffmpeg
2.0.1?
To: "This list is about using libavcodec, libavformat, libavutil,
libavdevice and libavfilter." <libav-user at ffmpeg.org>


Hi friends,

I'm writing a video converting application which uses ffmpeg dlls on
Windows. We used to use ffmpeg 1.1.3 and now are upgrading to ffmpeg 2.0.1
which was released just days ago.

Buw while compile is successful, when decoding and playing a mp4 files,
seems the video frames returned by avcodec_decode_video2 are not correct
(only first frame is correct, other frames are wrong, just showing dark),
and application 10 seconds after read/decode startes (video duration is 60
seconds)

The configuration I used is quite simple
   --disable-static
   --enable-shared
   --disable-doc
   --disable-ffplay
   --disable-ffprobe
   --disable-ffserver
   --disable-network
   --enable-small
   --enable-memalign-hack
   --disable-bsfs
   --disable-protocol=pipe
   --disable-bzlib
   --disable-devices

and I also added --enable-pthreads

ffmpeg reported lots error messages while decoding/playing.

Because we also develop Mac version, so I'll check if it also crashes Mac
version. I'll be so grateful if
anyone can give a hint on what's wrong with this Windows build.

Great thanks!

Line 282: 00:00:11.154  MAIN  FFMPEG: Format mov,mp4,m4a,3gp,3g2,mj2 probed
with size=2048 and score=100
    Line 284: 00:00:11.154  MAIN  FFMPEG: ISO: File Type Major Brand: mp42
    Line 286: 00:00:11.154  MAIN  FFMPEG: File position before
avformat_find_stream_info() is 37114
    Line 288: 00:00:11.154  MAIN  FFMPEG: All info found
    Line 290: 00:00:11.154  MAIN  FFMPEG: File position after
avformat_find_stream_info() is 73594
    Line 292: 00:00:11.154  MAIN  LFFMPEGSourceManagerVideoBase::Open -
success
    Line 293: 00:00:11.154  MAIN
LFFMPEGSourceManagerVideoBase::GetVideoSource
    Line 295: 00:00:11.170  MAIN  LFFMPEGSourceManagerBase::GetSoundSource
    Line 297: 00:00:11.170  MAIN  LFFMPEGSourceManagerVideoBase::Init
    Line 523: 00:00:14.524  7856  FFMPEG: AVC: nal size -17891602
    Line 525: 00:00:14.524  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 527: 00:00:14.524  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 542: 00:00:14.555  6516  FFMPEG: AVC: nal size -17891602
    Line 544: 00:00:14.555  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 546: 00:00:14.555  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 549: 00:00:14.602  7844  FFMPEG: AVC: nal size -285282562
    Line 551: 00:00:14.602  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 553: 00:00:14.602  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 556: 00:00:14.649  7856  FFMPEG: AVC: nal size -285282562
    Line 558: 00:00:14.649  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 560: 00:00:14.649  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 563: 00:00:14.680  6516  FFMPEG: AVC: nal size -285282562
    Line 565: 00:00:14.680  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 567: 00:00:14.680  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 570: 00:00:14.727  7844  FFMPEG: AVC: nal size -17891602
    Line 572: 00:00:14.727  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 574: 00:00:14.727  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 577: 00:00:14.774  7856  FFMPEG: AVC: nal size -285282562
    Line 579: 00:00:14.774  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 581: 00:00:14.774  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 584: 00:00:14.805  6516  FFMPEG: AVC: nal size -17891602
    Line 586: 00:00:14.820  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 588: 00:00:14.820  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 591: 00:00:14.852  7844  FFMPEG: AVC: nal size -285282562
    Line 593: 00:00:14.852  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 595: 00:00:14.852  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 598: 00:00:14.898  7856  FFMPEG: AVC: nal size -17891602
    Line 600: 00:00:14.898  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 602: 00:00:14.898  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 605: 00:00:14.945  6516  FFMPEG: AVC: nal size -285282562
    Line 607: 00:00:14.945  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 609: 00:00:14.945  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 612: 00:00:14.976  7844  FFMPEG: AVC: nal size -17891602
    Line 614: 00:00:14.976  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 616: 00:00:14.976  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 619: 00:00:15.023  7856  FFMPEG: AVC: nal size -17891602
    Line 621: 00:00:15.023  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 623: 00:00:15.023  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 638: 00:00:15.054  6516  FFMPEG: AVC: nal size -285282562
    Line 640: 00:00:15.054  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 642: 00:00:15.054  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 645: 00:00:15.101  7844  FFMPEG: AVC: nal size -17891602
    Line 647: 00:00:15.101  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 649: 00:00:15.101  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 652: 00:00:15.148  7856  FFMPEG: AVC: nal size -17891602
    Line 654: 00:00:15.148  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 656: 00:00:15.148  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 659: 00:00:15.179  6516  FFMPEG: AVC: nal size -285282562
    Line 661: 00:00:15.179  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 663: 00:00:15.179  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 666: 00:00:15.226  7844  FFMPEG: AVC: nal size -17891602
    Line 668: 00:00:15.226  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 670: 00:00:15.226  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 673: 00:00:15.273  7856  FFMPEG: AVC: nal size -285282562
    Line 675: 00:00:15.273  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 677: 00:00:15.273  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 680: 00:00:15.304  6516  FFMPEG: AVC: nal size -285282562
    Line 682: 00:00:15.304  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 684: 00:00:15.320  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 687: 00:00:15.351  7844  FFMPEG: AVC: nal size -17891602
    Line 689: 00:00:15.351  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 691: 00:00:15.351  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 694: 00:00:15.398  7856  FFMPEG: AVC: nal size -17891602
    Line 696: 00:00:15.398  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 698: 00:00:15.398  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 701: 00:00:15.444  6516  FFMPEG: AVC: nal size -17891602
    Line 703: 00:00:15.444  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 705: 00:00:15.444  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 708: 00:00:15.476  7844  FFMPEG: AVC: nal size -17891602
    Line 710: 00:00:15.476  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 712: 00:00:15.476  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 715: 00:00:15.522  7856  FFMPEG: AVC: nal size -17891602
    Line 717: 00:00:15.522  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 719: 00:00:15.522  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 722: 00:00:15.554  6516  FFMPEG: AVC: nal size -285282562
    Line 724: 00:00:15.554  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 726: 00:00:15.554  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 729: 00:00:15.600  7844  FFMPEG: AVC: nal size -17891602
    Line 731: 00:00:15.600  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 733: 00:00:15.600  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 748: 00:00:15.647  7856  FFMPEG: AVC: nal size -285282562
    Line 750: 00:00:15.647  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 752: 00:00:15.647  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 755: 00:00:15.678  6516  FFMPEG: AVC: nal size -285282562
    Line 757: 00:00:15.678  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 759: 00:00:15.678  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 762: 00:00:15.725  7844  FFMPEG: AVC: nal size -17891602
    Line 764: 00:00:15.725  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 766: 00:00:15.725  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 769: 00:00:15.772  7856  FFMPEG: AVC: nal size -285282562
    Line 771: 00:00:15.772  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 773: 00:00:15.772  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 776: 00:00:15.803  6516  FFMPEG: AVC: nal size -285282562
    Line 778: 00:00:15.819  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 780: 00:00:15.819  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 783: 00:00:15.850  7844  FFMPEG: AVC: nal size -17891602
    Line 785: 00:00:15.850  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 787: 00:00:15.850  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 790: 00:00:15.897  7856  FFMPEG: AVC: nal size -285282562
    Line 792: 00:00:15.897  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 794: 00:00:15.897  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 797: 00:00:15.944  6516  FFMPEG: AVC: nal size -285282562
    Line 799: 00:00:15.944  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 801: 00:00:15.944  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 804: 00:00:15.975  7844  FFMPEG: AVC: nal size -285282562
    Line 806: 00:00:15.975  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 808: 00:00:15.975  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 811: 00:00:16.022  7856  FFMPEG: AVC: nal size -285282562
    Line 813: 00:00:16.022  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 815: 00:00:16.022  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 818: 00:00:16.068  6516  FFMPEG: AVC: nal size -17891602
    Line 820: 00:00:16.068  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 822: 00:00:16.068  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 825: 00:00:16.100  7844  FFMPEG: AVC: nal size -17891602
    Line 827: 00:00:16.100  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 829: 00:00:16.100  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 833: 00:00:16.146  7856  FFMPEG: AVC: nal size -17891602
    Line 836: 00:00:16.146  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 838: 00:00:16.146  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 851: 00:00:16.178  6516  FFMPEG: AVC: nal size -285282562
    Line 853: 00:00:16.178  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 855: 00:00:16.193  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 858: 00:00:16.224  7844  FFMPEG: AVC: nal size -17891602
    Line 860: 00:00:16.224  7844  FFMPEG: Cannot use next picture in error
concealment Line 282: 00:00:11.154  MAIN  FFMPEG: Format
mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    Line 284: 00:00:11.154  MAIN  FFMPEG: ISO: File Type Major Brand: mp42
    Line 286: 00:00:11.154  MAIN  FFMPEG: File position before
avformat_find_stream_info() is 37114
    Line 288: 00:00:11.154  MAIN  FFMPEG: All info found
    Line 290: 00:00:11.154  MAIN  FFMPEG: File position after
avformat_find_stream_info() is 73594
    Line 292: 00:00:11.154  MAIN  LFFMPEGSourceManagerVideoBase::Open -
success
    Line 293: 00:00:11.154  MAIN
LFFMPEGSourceManagerVideoBase::GetVideoSource
    Line 295: 00:00:11.170  MAIN  LFFMPEGSourceManagerBase::GetSoundSource
    Line 297: 00:00:11.170  MAIN  LFFMPEGSourceManagerVideoBase::Init
    Line 523: 00:00:14.524  7856  FFMPEG: AVC: nal size -17891602
    Line 525: 00:00:14.524  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 527: 00:00:14.524  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 542: 00:00:14.555  6516  FFMPEG: AVC: nal size -17891602
    Line 544: 00:00:14.555  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 546: 00:00:14.555  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 549: 00:00:14.602  7844  FFMPEG: AVC: nal size -285282562
    Line 551: 00:00:14.602  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 553: 00:00:14.602  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 556: 00:00:14.649  7856  FFMPEG: AVC: nal size -285282562
    Line 558: 00:00:14.649  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 560: 00:00:14.649  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 563: 00:00:14.680  6516  FFMPEG: AVC: nal size -285282562
    Line 565: 00:00:14.680  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 567: 00:00:14.680  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 570: 00:00:14.727  7844  FFMPEG: AVC: nal size -17891602
    Line 572: 00:00:14.727  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 574: 00:00:14.727  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 577: 00:00:14.774  7856  FFMPEG: AVC: nal size -285282562
    Line 579: 00:00:14.774  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 581: 00:00:14.774  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 584: 00:00:14.805  6516  FFMPEG: AVC: nal size -17891602
    Line 586: 00:00:14.820  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 588: 00:00:14.820  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 591: 00:00:14.852  7844  FFMPEG: AVC: nal size -285282562
    Line 593: 00:00:14.852  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 595: 00:00:14.852  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 598: 00:00:14.898  7856  FFMPEG: AVC: nal size -17891602
    Line 600: 00:00:14.898  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 602: 00:00:14.898  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 605: 00:00:14.945  6516  FFMPEG: AVC: nal size -285282562
    Line 607: 00:00:14.945  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 609: 00:00:14.945  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 612: 00:00:14.976  7844  FFMPEG: AVC: nal size -17891602
    Line 614: 00:00:14.976  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 616: 00:00:14.976  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 619: 00:00:15.023  7856  FFMPEG: AVC: nal size -17891602
    Line 621: 00:00:15.023  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 623: 00:00:15.023  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 638: 00:00:15.054  6516  FFMPEG: AVC: nal size -285282562
    Line 640: 00:00:15.054  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 642: 00:00:15.054  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 645: 00:00:15.101  7844  FFMPEG: AVC: nal size -17891602
    Line 647: 00:00:15.101  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 649: 00:00:15.101  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 652: 00:00:15.148  7856  FFMPEG: AVC: nal size -17891602
    Line 654: 00:00:15.148  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 656: 00:00:15.148  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 659: 00:00:15.179  6516  FFMPEG: AVC: nal size -285282562
    Line 661: 00:00:15.179  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 663: 00:00:15.179  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 666: 00:00:15.226  7844  FFMPEG: AVC: nal size -17891602
    Line 668: 00:00:15.226  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 670: 00:00:15.226  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 673: 00:00:15.273  7856  FFMPEG: AVC: nal size -285282562
    Line 675: 00:00:15.273  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 677: 00:00:15.273  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 680: 00:00:15.304  6516  FFMPEG: AVC: nal size -285282562
    Line 682: 00:00:15.304  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 684: 00:00:15.320  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 687: 00:00:15.351  7844  FFMPEG: AVC: nal size -17891602
    Line 689: 00:00:15.351  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 691: 00:00:15.351  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 694: 00:00:15.398  7856  FFMPEG: AVC: nal size -17891602
    Line 696: 00:00:15.398  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 698: 00:00:15.398  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 701: 00:00:15.444  6516  FFMPEG: AVC: nal size -17891602
    Line 703: 00:00:15.444  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 705: 00:00:15.444  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 708: 00:00:15.476  7844  FFMPEG: AVC: nal size -17891602
    Line 710: 00:00:15.476  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 712: 00:00:15.476  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 715: 00:00:15.522  7856  FFMPEG: AVC: nal size -17891602
    Line 717: 00:00:15.522  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 719: 00:00:15.522  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 722: 00:00:15.554  6516  FFMPEG: AVC: nal size -285282562
    Line 724: 00:00:15.554  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 726: 00:00:15.554  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 729: 00:00:15.600  7844  FFMPEG: AVC: nal size -17891602
    Line 731: 00:00:15.600  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 733: 00:00:15.600  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 748: 00:00:15.647  7856  FFMPEG: AVC: nal size -285282562
    Line 750: 00:00:15.647  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 752: 00:00:15.647  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 755: 00:00:15.678  6516  FFMPEG: AVC: nal size -285282562
    Line 757: 00:00:15.678  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 759: 00:00:15.678  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 762: 00:00:15.725  7844  FFMPEG: AVC: nal size -17891602
    Line 764: 00:00:15.725  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 766: 00:00:15.725  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 769: 00:00:15.772  7856  FFMPEG: AVC: nal size -285282562
    Line 771: 00:00:15.772  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 773: 00:00:15.772  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 776: 00:00:15.803  6516  FFMPEG: AVC: nal size -285282562
    Line 778: 00:00:15.819  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 780: 00:00:15.819  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 783: 00:00:15.850  7844  FFMPEG: AVC: nal size -17891602
    Line 785: 00:00:15.850  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 787: 00:00:15.850  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 790: 00:00:15.897  7856  FFMPEG: AVC: nal size -285282562
    Line 792: 00:00:15.897  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 794: 00:00:15.897  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 797: 00:00:15.944  6516  FFMPEG: AVC: nal size -285282562
    Line 799: 00:00:15.944  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 801: 00:00:15.944  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 804: 00:00:15.975  7844  FFMPEG: AVC: nal size -285282562
    Line 806: 00:00:15.975  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 808: 00:00:15.975  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 811: 00:00:16.022  7856  FFMPEG: AVC: nal size -285282562
    Line 813: 00:00:16.022  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 815: 00:00:16.022  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 818: 00:00:16.068  6516  FFMPEG: AVC: nal size -17891602
    Line 820: 00:00:16.068  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 822: 00:00:16.068  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 825: 00:00:16.100  7844  FFMPEG: AVC: nal size -17891602
    Line 827: 00:00:16.100  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 829: 00:00:16.100  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 833: 00:00:16.146  7856  FFMPEG: AVC: nal size -17891602
    Line 836: 00:00:16.146  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 838: 00:00:16.146  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 851: 00:00:16.178  6516  FFMPEG: AVC: nal size -285282562
    Line 853: 00:00:16.178  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 855: 00:00:16.193  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 858: 00:00:16.224  7844  FFMPEG: AVC: nal size -17891602
    Line 860: 00:00:16.224  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 862: 00:00:16.224  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 865: 00:00:16.271  7856  FFMPEG: AVC: nal size -285282562
    Line 867: 00:00:16.271  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 869: 00:00:16.271  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 872: 00:00:16.318  6516  FFMPEG: AVC: nal size -285282562
    Line 874: 00:00:16.318  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 876: 00:00:16.318  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 879: 00:00:16.349  7844  FFMPEG: AVC: nal size -285282562
    Line 881: 00:00:16.349  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 883: 00:00:16.349  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 886: 00:00:16.396  7856  FFMPEG: AVC: nal size -285282562
    Line 888: 00:00:16.396  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 890: 00:00:16.396  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 893: 00:00:16.443  6516  FFMPEG: AVC: nal size -285282562
    Line 895: 00:00:16.443  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 897: 00:00:16.443  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 900: 00:00:16.474  7844  FFMPEG: AVC: nal size -17891602
    Line 902: 00:00:16.474  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 904: 00:00:16.474  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 907: 00:00:16.521  7856  FFMPEG: AVC: nal size -285282562
    Line 909: 00:00:16.521  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 911: 00:00:16.521  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 926: 00:00:16.568  6516  FFMPEG: AVC: nal size -285282562
    Line 928: 00:00:16.568  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 930: 00:00:16.568  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 933: 00:00:16.599  7844  FFMPEG: AVC: nal size -17891602
    Line 935: 00:00:16.599  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 937: 00:00:16.599  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 940: 00:00:16.646  7856  FFMPEG: AVC: nal size -17891602
    Line 942: 00:00:16.646  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 944: 00:00:16.646  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 947: 00:00:16.692  6516  FFMPEG: AVC: nal size -285282562
    Line 949: 00:00:16.692  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 951: 00:00:16.692  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 954: 00:00:16.724  7844  FFMPEG: AVC: nal size -17891602
    Line 956: 00:00:16.724  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 958: 00:00:16.739  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 961: 00:00:16.770  7856  FFMPEG: AVC: nal size -285282562
    Line 963: 00:00:16.770  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 965: 00:00:16.770  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 968: 00:00:16.802  6516  FFMPEG: AVC: nal size -17891602
    Line 970: 00:00:16.817  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 972: 00:00:16.817  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 975: 00:00:16.848  7844  FFMPEG: AVC: nal size -285282562
    Line 977: 00:00:16.848  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 979: 00:00:16.848  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 982: 00:00:16.895  7856  FFMPEG: AVC: nal size -17891602
    Line 984: 00:00:16.895  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 986: 00:00:16.895  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 989: 00:00:16.926  6516  FFMPEG: AVC: nal size -285282562
    Line 991: 00:00:16.942  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 993: 00:00:16.942  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 996: 00:00:16.973  7844  FFMPEG: AVC: nal size -17891602
    Line 998: 00:00:16.973  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1000: 00:00:16.973  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1003: 00:00:17.020  7856  FFMPEG: AVC: nal size -285282562
    Line 1005: 00:00:17.020  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1007: 00:00:17.020  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1022: 00:00:17.067  6516  FFMPEG: AVC: nal size -17891602
    Line 1024: 00:00:17.067  6516  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in I frame
    Line 1027: 00:00:17.098  7844  FFMPEG: AVC: nal size -17891602
    Line 1029: 00:00:17.098  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1031: 00:00:17.098  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1034: 00:00:17.145  7856  FFMPEG: AVC: nal size -285282562
    Line 1036: 00:00:17.145  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1038: 00:00:17.145  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1041: 00:00:17.192  6516  FFMPEG: AVC: nal size -17891602
    Line 1043: 00:00:17.192  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1045: 00:00:17.192  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1048: 00:00:17.223  7844  FFMPEG: AVC: nal size -17891602
    Line 1050: 00:00:17.238  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1052: 00:00:17.238  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1055: 00:00:17.270  7856  FFMPEG: AVC: nal size -17891602
    Line 1057: 00:00:17.270  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1059: 00:00:17.270  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1062: 00:00:17.316  6516  FFMPEG: AVC: nal size -17891602
    Line 1064: 00:00:17.316  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1066: 00:00:17.316  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1069: 00:00:17.348  7844  FFMPEG: AVC: nal size -285282562
    Line 1071: 00:00:17.348  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1073: 00:00:17.348  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1076: 00:00:17.394  7856  FFMPEG: AVC: nal size -17891602
    Line 1078: 00:00:17.394  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1080: 00:00:17.394  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1083: 00:00:17.441  6516  FFMPEG: AVC: nal size -285282562
    Line 1085: 00:00:17.441  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1087: 00:00:17.441  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1090: 00:00:17.472  7844  FFMPEG: AVC: nal size -17891602
    Line 1092: 00:00:17.472  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1094: 00:00:17.472  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1097: 00:00:17.519  7856  FFMPEG: AVC: nal size -17891602
    Line 1099: 00:00:17.519  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1101: 00:00:17.519  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1104: 00:00:17.566  6516  FFMPEG: AVC: nal size -17891602
    Line 1106: 00:00:17.566  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1108: 00:00:17.566  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1111: 00:00:17.597  7844  FFMPEG: AVC: nal size -17891602
    Line 1113: 00:00:17.597  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1115: 00:00:17.597  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1121: 00:00:17.644  7856  FFMPEG: AVC: nal size -572662307
    Line 1124: 00:00:17.660  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1127: 00:00:17.660  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1137: 00:00:17.691  6516  FFMPEG: AVC: nal size -285282562
    Line 1139: 00:00:17.691  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1141: 00:00:17.691  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1144: 00:00:17.722  7844  FFMPEG: AVC: nal size -285282562
    Line 1146: 00:00:17.738  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1148: 00:00:17.738  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1151: 00:00:17.769  7856  FFMPEG: AVC: nal size -285282562
    Line 1153: 00:00:17.769  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1155: 00:00:17.769  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1158: 00:00:17.816  6516  FFMPEG: AVC: nal size -285282562
    Line 1160: 00:00:17.816  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1162: 00:00:17.816  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1165: 00:00:17.862  7844  FFMPEG: AVC: nal size -285282562
    Line 1167: 00:00:17.862  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1169: 00:00:17.862  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1172: 00:00:17.894  7856  FFMPEG: AVC: nal size -285282562
    Line 1174: 00:00:17.894  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1176: 00:00:17.894  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1179: 00:00:17.940  6516  FFMPEG: AVC: nal size -17891602
    Line 1181: 00:00:17.940  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1183: 00:00:17.940  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1186: 00:00:17.972  7844  FFMPEG: AVC: nal size -17891602
    Line 1188: 00:00:17.972  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1190: 00:00:17.972  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1193: 00:00:18.018  7856  FFMPEG: AVC: nal size -285282562
    Line 1195: 00:00:18.018  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1197: 00:00:18.018  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1200: 00:00:18.065  6516  FFMPEG: AVC: nal size -17891602
    Line 1202: 00:00:18.065  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1204: 00:00:18.065  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1207: 00:00:18.096  7844  FFMPEG: AVC: nal size -285282562
    Line 1209: 00:00:18.096  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1211: 00:00:18.096  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1215: 00:00:18.143  7856  FFMPEG: AVC: nal size -285282562
    Line 1218: 00:00:18.143  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1221: 00:00:18.143  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1233: 00:00:18.190  6516  FFMPEG: AVC: nal size -285282562
    Line 1235: 00:00:18.190  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1237: 00:00:18.190  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1240: 00:00:18.221  7844  FFMPEG: AVC: nal size -285282562
    Line 1242: 00:00:18.221  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1244: 00:00:18.237  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1247: 00:00:18.268  7856  FFMPEG: AVC: nal size -285282562
    Line 1249: 00:00:18.268  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1251: 00:00:18.268  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1254: 00:00:18.315  6516  FFMPEG: AVC: nal size -285282562
    Line 1256: 00:00:18.315  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1258: 00:00:18.315  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1261: 00:00:18.346  7844  FFMPEG: AVC: nal size -17891602
    Line 1263: 00:00:18.362  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1265: 00:00:18.362  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1268: 00:00:18.393  7856  FFMPEG: AVC: nal size -285282562
    Line 1270: 00:00:18.393  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1272: 00:00:18.393  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1275: 00:00:18.440  6516  FFMPEG: AVC: nal size -17891602
    Line 1277: 00:00:18.440  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1279: 00:00:18.440  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1282: 00:00:18.486  7844  FFMPEG: AVC: nal size -285282562
    Line 1284: 00:00:18.486  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1286: 00:00:18.486  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1289: 00:00:18.518  7856  FFMPEG: AVC: nal size -17891602
    Line 1291: 00:00:18.518  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1293: 00:00:18.518  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1308: 00:00:18.564  6516  FFMPEG: AVC: nal size -17891602
    Line 1310: 00:00:18.564  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1312: 00:00:18.564  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1315: 00:00:18.596  7844  FFMPEG: AVC: nal size -17891602
    Line 1317: 00:00:18.596  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1319: 00:00:18.596  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1322: 00:00:18.642  7856  FFMPEG: AVC: nal size -285282562
    Line 1324: 00:00:18.642  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1326: 00:00:18.642  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1329: 00:00:18.689  6516  FFMPEG: AVC: nal size -17891602
    Line 1331: 00:00:18.689  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1333: 00:00:18.689  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1336: 00:00:18.720  7844  FFMPEG: AVC: nal size -17891602
    Line 1338: 00:00:18.736  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1340: 00:00:18.736  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1343: 00:00:18.767  7856  FFMPEG: AVC: nal size -17891602
    Line 1345: 00:00:18.767  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1347: 00:00:18.767  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1350: 00:00:18.814  6516  FFMPEG: AVC: nal size -17891602
    Line 1352: 00:00:18.814  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 862: 00:00:16.224  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 865: 00:00:16.271  7856  FFMPEG: AVC: nal size -285282562
    Line 867: 00:00:16.271  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 869: 00:00:16.271  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 872: 00:00:16.318  6516  FFMPEG: AVC: nal size -285282562
    Line 874: 00:00:16.318  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 876: 00:00:16.318  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 879: 00:00:16.349  7844  FFMPEG: AVC: nal size -285282562
    Line 881: 00:00:16.349  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 883: 00:00:16.349  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 886: 00:00:16.396  7856  FFMPEG: AVC: nal size -285282562
    Line 888: 00:00:16.396  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 890: 00:00:16.396  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 893: 00:00:16.443  6516  FFMPEG: AVC: nal size -285282562
    Line 895: 00:00:16.443  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 897: 00:00:16.443  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 900: 00:00:16.474  7844  FFMPEG: AVC: nal size -17891602
    Line 902: 00:00:16.474  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 904: 00:00:16.474  7844  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 907: 00:00:16.521  7856  FFMPEG: AVC: nal size -285282562
    Line 909: 00:00:16.521  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 911: 00:00:16.521  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 926: 00:00:16.568  6516  FFMPEG: AVC: nal size -285282562
    Line 928: 00:00:16.568  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 930: 00:00:16.568  6516  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 933: 00:00:16.599  7844  FFMPEG: AVC: nal size -17891602
    Line 935: 00:00:16.599  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 937: 00:00:16.599  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 940: 00:00:16.646  7856  FFMPEG: AVC: nal size -17891602
    Line 942: 00:00:16.646  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 944: 00:00:16.646  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 947: 00:00:16.692  6516  FFMPEG: AVC: nal size -285282562
    Line 949: 00:00:16.692  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 951: 00:00:16.692  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 954: 00:00:16.724  7844  FFMPEG: AVC: nal size -17891602
    Line 956: 00:00:16.724  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 958: 00:00:16.739  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 961: 00:00:16.770  7856  FFMPEG: AVC: nal size -285282562
    Line 963: 00:00:16.770  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 965: 00:00:16.770  7856  FFMPEG: concealing 736 DC, 736 AC, 736 MV
errors in P frame
    Line 968: 00:00:16.802  6516  FFMPEG: AVC: nal size -17891602
    Line 970: 00:00:16.817  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 972: 00:00:16.817  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 975: 00:00:16.848  7844  FFMPEG: AVC: nal size -285282562
    Line 977: 00:00:16.848  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 979: 00:00:16.848  7844  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 982: 00:00:16.895  7856  FFMPEG: AVC: nal size -17891602
    Line 984: 00:00:16.895  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 986: 00:00:16.895  7856  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 989: 00:00:16.926  6516  FFMPEG: AVC: nal size -285282562
    Line 991: 00:00:16.942  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 993: 00:00:16.942  6516  FFMPEG: concealing 552 DC, 552 AC, 552 MV
errors in P frame
    Line 996: 00:00:16.973  7844  FFMPEG: AVC: nal size -17891602
    Line 998: 00:00:16.973  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1000: 00:00:16.973  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1003: 00:00:17.020  7856  FFMPEG: AVC: nal size -285282562
    Line 1005: 00:00:17.020  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1007: 00:00:17.020  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1022: 00:00:17.067  6516  FFMPEG: AVC: nal size -17891602
    Line 1024: 00:00:17.067  6516  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in I frame
    Line 1027: 00:00:17.098  7844  FFMPEG: AVC: nal size -17891602
    Line 1029: 00:00:17.098  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1031: 00:00:17.098  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1034: 00:00:17.145  7856  FFMPEG: AVC: nal size -285282562
    Line 1036: 00:00:17.145  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1038: 00:00:17.145  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1041: 00:00:17.192  6516  FFMPEG: AVC: nal size -17891602
    Line 1043: 00:00:17.192  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1045: 00:00:17.192  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1048: 00:00:17.223  7844  FFMPEG: AVC: nal size -17891602
    Line 1050: 00:00:17.238  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1052: 00:00:17.238  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1055: 00:00:17.270  7856  FFMPEG: AVC: nal size -17891602
    Line 1057: 00:00:17.270  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1059: 00:00:17.270  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1062: 00:00:17.316  6516  FFMPEG: AVC: nal size -17891602
    Line 1064: 00:00:17.316  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1066: 00:00:17.316  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1069: 00:00:17.348  7844  FFMPEG: AVC: nal size -285282562
    Line 1071: 00:00:17.348  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1073: 00:00:17.348  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1076: 00:00:17.394  7856  FFMPEG: AVC: nal size -17891602
    Line 1078: 00:00:17.394  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1080: 00:00:17.394  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1083: 00:00:17.441  6516  FFMPEG: AVC: nal size -285282562
    Line 1085: 00:00:17.441  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1087: 00:00:17.441  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1090: 00:00:17.472  7844  FFMPEG: AVC: nal size -17891602
    Line 1092: 00:00:17.472  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1094: 00:00:17.472  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1097: 00:00:17.519  7856  FFMPEG: AVC: nal size -17891602
    Line 1099: 00:00:17.519  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1101: 00:00:17.519  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1104: 00:00:17.566  6516  FFMPEG: AVC: nal size -17891602
    Line 1106: 00:00:17.566  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1108: 00:00:17.566  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1111: 00:00:17.597  7844  FFMPEG: AVC: nal size -17891602
    Line 1113: 00:00:17.597  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1115: 00:00:17.597  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1121: 00:00:17.644  7856  FFMPEG: AVC: nal size -572662307
    Line 1124: 00:00:17.660  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1127: 00:00:17.660  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1137: 00:00:17.691  6516  FFMPEG: AVC: nal size -285282562
    Line 1139: 00:00:17.691  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1141: 00:00:17.691  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1144: 00:00:17.722  7844  FFMPEG: AVC: nal size -285282562
    Line 1146: 00:00:17.738  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1148: 00:00:17.738  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1151: 00:00:17.769  7856  FFMPEG: AVC: nal size -285282562
    Line 1153: 00:00:17.769  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1155: 00:00:17.769  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1158: 00:00:17.816  6516  FFMPEG: AVC: nal size -285282562
    Line 1160: 00:00:17.816  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1162: 00:00:17.816  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1165: 00:00:17.862  7844  FFMPEG: AVC: nal size -285282562
    Line 1167: 00:00:17.862  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1169: 00:00:17.862  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1172: 00:00:17.894  7856  FFMPEG: AVC: nal size -285282562
    Line 1174: 00:00:17.894  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1176: 00:00:17.894  7856  FFMPEG: concealing 736 DC, 736 AC, 736
MV errors in P frame
    Line 1179: 00:00:17.940  6516  FFMPEG: AVC: nal size -17891602
    Line 1181: 00:00:17.940  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1183: 00:00:17.940  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1186: 00:00:17.972  7844  FFMPEG: AVC: nal size -17891602
    Line 1188: 00:00:17.972  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1190: 00:00:17.972  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1193: 00:00:18.018  7856  FFMPEG: AVC: nal size -285282562
    Line 1195: 00:00:18.018  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1197: 00:00:18.018  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1200: 00:00:18.065  6516  FFMPEG: AVC: nal size -17891602
    Line 1202: 00:00:18.065  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1204: 00:00:18.065  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1207: 00:00:18.096  7844  FFMPEG: AVC: nal size -285282562
    Line 1209: 00:00:18.096  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1211: 00:00:18.096  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1215: 00:00:18.143  7856  FFMPEG: AVC: nal size -285282562
    Line 1218: 00:00:18.143  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1221: 00:00:18.143  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1233: 00:00:18.190  6516  FFMPEG: AVC: nal size -285282562
    Line 1235: 00:00:18.190  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1237: 00:00:18.190  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1240: 00:00:18.221  7844  FFMPEG: AVC: nal size -285282562
    Line 1242: 00:00:18.221  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1244: 00:00:18.237  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1247: 00:00:18.268  7856  FFMPEG: AVC: nal size -285282562
    Line 1249: 00:00:18.268  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1251: 00:00:18.268  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1254: 00:00:18.315  6516  FFMPEG: AVC: nal size -285282562
    Line 1256: 00:00:18.315  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1258: 00:00:18.315  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1261: 00:00:18.346  7844  FFMPEG: AVC: nal size -17891602
    Line 1263: 00:00:18.362  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1265: 00:00:18.362  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1268: 00:00:18.393  7856  FFMPEG: AVC: nal size -285282562
    Line 1270: 00:00:18.393  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1272: 00:00:18.393  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1275: 00:00:18.440  6516  FFMPEG: AVC: nal size -17891602
    Line 1277: 00:00:18.440  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1279: 00:00:18.440  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1282: 00:00:18.486  7844  FFMPEG: AVC: nal size -285282562
    Line 1284: 00:00:18.486  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1286: 00:00:18.486  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1289: 00:00:18.518  7856  FFMPEG: AVC: nal size -17891602
    Line 1291: 00:00:18.518  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1293: 00:00:18.518  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1308: 00:00:18.564  6516  FFMPEG: AVC: nal size -17891602
    Line 1310: 00:00:18.564  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1312: 00:00:18.564  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1315: 00:00:18.596  7844  FFMPEG: AVC: nal size -17891602
    Line 1317: 00:00:18.596  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1319: 00:00:18.596  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1322: 00:00:18.642  7856  FFMPEG: AVC: nal size -285282562
    Line 1324: 00:00:18.642  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1326: 00:00:18.642  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1329: 00:00:18.689  6516  FFMPEG: AVC: nal size -17891602
    Line 1331: 00:00:18.689  6516  FFMPEG: Cannot use next picture in error
concealment
    Line 1333: 00:00:18.689  6516  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1336: 00:00:18.720  7844  FFMPEG: AVC: nal size -17891602
    Line 1338: 00:00:18.736  7844  FFMPEG: Cannot use next picture in error
concealment
    Line 1340: 00:00:18.736  7844  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1343: 00:00:18.767  7856  FFMPEG: AVC: nal size -17891602
    Line 1345: 00:00:18.767  7856  FFMPEG: Cannot use next picture in error
concealment
    Line 1347: 00:00:18.767  7856  FFMPEG: concealing 552 DC, 552 AC, 552
MV errors in P frame
    Line 1350: 00:00:18.814  6516  FFMPEG: AVC: nal size -17891602
    Line 1352: 00:00:18.814  6516  FFMPEG: Cannot use next picture in error
concealment
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From j.lugagne at spikenet-technology.com  Thu Aug 22 10:44:26 2013
From: j.lugagne at spikenet-technology.com (Jeremy Lugagne)
Date: Thu, 22 Aug 2013 10:44:26 +0200
Subject: [Libav-user] Close a RTSP stream
Message-ID: <201308221044245478368@spikenet-technology.com>

Hello all,

I'm using the libav to grab images from a network camera with the rtsp protocol but I have an issue. When I release the stream, my camera don't release resources for the sessions, so when I do 4 tests with my applications I must restart the camera because I have no more slot.

This is how I open the stream :
<code>
  AVFormatContext *pFormatCtx;
  AVCodecContext* vCodecCtxp;
  AVPacket packet;
  AVFrame *pFrame;
  AVFrame *pFrameRGB = NULL;
  int numBytes;
  AVDictionary *optionsDict = NULL;
  struct SwsContext *sws_ctx = NULL;
  uint8_t *buffer = NULL;
  AVCodec *videoCodec;

  av_register_all();
  avformat_network_init();
  pFormatCtx = avformat_alloc_context();
  if(avformat_open_input(&pFormatCtx, qPrintable(url), NULL, 0)!=0)
     return false; // Couldn't open file
  videoStream=-1;

  if(avformat_find_stream_info(pFormatCtx,NULL) < 0){
    return false;
  }
  for(int i=0; i<pFormatCtx->nb_streams; i++) {
    if(pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO && videoStream < 0) {
      videoStream=i;
    }
  }
  vCodecCtxp = pFormatCtx->streams[videoStream]->codec;

  // Allocate an AVFrame structure
  pFrameRGB = avcodec_alloc_frame();
  pFrame = avcodec_alloc_frame();
  if(pFrameRGB==NULL)  return ;

  // Determine required buffer size and allocate buffer
  numBytes=avpicture_get_size(PIX_FMT_RGB24, vCodecCtxp->width, vCodecCtxp->height);
  buffer=(uint8_t *)av_malloc(numBytes*sizeof(uint8_t));

  sws_ctx = sws_getContext(vCodecCtxp->width, vCodecCtxp->height, vCodecCtxp->pix_fmt, vCodecCtxp->width, vCodecCtxp->height, PIX_FMT_RGB24, SWS_BILINEAR, NULL, NULL, NULL );

  // Assign appropriate parts of buffer to image planes in pFrameRGB. Note that pFrameRGB is an AVFrame, but AVFrame is a superset of AVPicture
  avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24, vCodecCtxp->width, vCodecCtxp->height);
  
  // Assign appropriate parts of buffer to image planes in pFrameRGB. Note that pFrameRGB is an AVFrame, but AVFrame is a superset of AVPicture
  int res = avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24, vCodecCtxp->width, vCodecCtxp->height);
  
  videoCodec=avcodec_find_decoder(vCodecCtxp->codec_id);
  avcodec_open2(vCodecCtxp, videoCodec, 0);

  av_read_play(pFormatCtx);
</code>

And how I close it :
<code>
  av_free(pFrameRGB);
  av_free(buffer);
  av_free(pFrame);
  sws_freeContext(sws_ctx);
  avformat_close_input(&pFormatCtx);
</code>

Do i forgetting something to close properly my stream ? Because when I watch what messages are sent to the camera I see the TEARDOWN message.

Thanks in advance,

Jeremy L.
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From er.anshul.maheshwari at gmail.com  Fri Aug 23 07:15:57 2013
From: er.anshul.maheshwari at gmail.com (Anshul)
Date: Fri, 23 Aug 2013 10:45:57 +0530
Subject: [Libav-user] muxing h264/aac stream
In-Reply-To: <CAL1+ejjbJ4pdN49JhupHer+PgvxPvJG+zZsSuFsPPecxr7DaDQ@mail.gmail.com>
References: <CAL1+ejjZhiYbm8t1usigTuP8TBE=NHij08zivH0BDuFCCJ-ZSw@mail.gmail.com>
	<CAJMy86HO_yVqABRe0zFUZZPUj1YXYO-jLXKEUZ5n-6zaxhi7zg@mail.gmail.com>
	<CAL1+ejjkKHX90dgg=-w9tbQLyqoagNdCJ0k+ArBJnbAOzzs+tg@mail.gmail.com>
	<CAL1+ejjbJ4pdN49JhupHer+PgvxPvJG+zZsSuFsPPecxr7DaDQ@mail.gmail.com>
Message-ID: <5216F00D.8060007@gmail.com>

On 08/22/2013 06:21 PM, Nisar Ahmed wrote:
> Coming back to this issue, I have tested 2 scenarios
>
> a. I am simply setting pts to the timestamp received from encoder and 
> dts to 0 but the resulting file is showing very large frame rate value.
>
> b. Setting pts to the timestamp received from encoder but this time 
> setting dts with an increment of 1001 starting from -1001 (2002/-1001, 
> 0/0, 1001/1001, 5005/2002, 3003/3003). The framerate is correct this 
> time but the quicktime player displays a white frame at the start of 
> the movie. I investigated this issue further by using libav demuxer 
> sample and the pts/dts have been changed from what I set and 
> start_time is also not 0. VLC plays fine but I also want Quicktime 
> player to play the file normally as well.
>
> The movies created by the software which ships with he encoder shows 
> correct frame rate and start time of 0, also the pts/dts investigated 
> with the demuxing sample are in the same sequence as described in the 
> second scenario.
>
> I really need to understand why my pts/dts are changed by the muxer to 
> different values, may be it is trying to guess correct values based on 
> the inputs I provided. Which inputs matter in this kind of scenarios 
> and how they relate to each other?
>
> Thanks in advance
> Nisar
>
>
> On Sat, Aug 17, 2013 at 11:05 AM, Nisar Ahmed <nisar.med at gmail.com 
> <mailto:nisar.med at gmail.com>> wrote:
>
>     Thanks for your answer, when I set timestamp of decoder, the frame
>     rate jumps up to a very large value
>
>     pts/dts = (2002/0, 0/0, 1001/0, 5005/0, 3003/0...)
>
>     am I setting the time_base to correct values 1001/30000 and
>     pkt.duration = 1001? the timescale of the timestamp is also 30000
>
>
>     On Sat, Aug 17, 2013 at 2:10 AM, Anshul maheshwari
>     <er.anshul.maheshwari at gmail.com
>     <mailto:er.anshul.maheshwari at gmail.com>> wrote:
>
>         -
>
>
>         On Aug 16, 2013 7:30 PM, "Nisar Ahmed" <nisar.med at gmail.com
>         <mailto:nisar.med at gmail.com>> wrote:
>         >
>         > I am muxing h264/aac stream to mp4 coming from an encoder
>         and having issues syncing audio and video streams.
>         >
>         > I suspect that the problem is with PTS and DTS but I am not
>         sure what values should i set to properly sync both streams.
>         >
>         > I have set the time_base of video stream's AVCodecContext to
>         1001/30000 and each AVPacket gets a duration of 1001
>         >
>         > I am recieving time stamps from the encoder with each NAL
>         packet which is set as PTS of the AVPacket. the sequence of
>         PTS/DTS I set is (2002/0, 0/1001, 1001/2002, 5005/3003,
>         3003/4004...)
>         >
>         > Audio stream AVCodecContext sample rate is 48000 and PTS/DTS
>         are simply multiples of 1024 starting from 0 and AVPacket
>         duration is 1024.
>         >
>         > The output movie 's frame rate is 20fps when it should be
>         29.97fps as it is ntsc.
>         >
>         > Please tell me how to debug this problem and what are the
>         guidelines of creating pts/dts for both video and audio in my case
>         >
>         > _______________________________________________
>         > Libav-user mailing list
>         > Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>         > http://ffmpeg.org/mailman/listinfo/libav-user
>         >
>         Hi naseer
>
>         If you are getting timestamp with encoder,  i would suggest
>         "dont try to manuplate that" you may set that same timestamp
>         as presentation timestamp (pts) if your video is realtime then
>         try not to generate B type video frame hence no need to set dts.
>         Whatever clock is set by encoder try generating the pts of
>         audio according to that.
>
>         @enjoy
>         Anshul
>
>
>         _______________________________________________
>         Libav-user mailing list
>         Libav-user at ffmpeg.org <mailto:Libav-user at ffmpeg.org>
>         http://ffmpeg.org/mailman/listinfo/libav-user
>
>
>
>
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
please don't top post over here,

 >I really need to understand why my pts/dts are changed by the muxer to 
different values, may be it is trying to guess correct values based on 
the inputs I provided. Which
 >inputs matter in this kind of scenarios and how they relate to each other?

Muxer does not change the pts or dts if you have provided by your own, 
may be you are unable to set pts, dts in your muxer.
please refer below code, it is not kind of tutorial but  extract needed 
part.

Note: your a part wont work because your h264 elementary stream contain 
b frame, where dts is important part.
             and your b part wont work, there might be simple reason for 
that it does not calculate start time properly, so when it is 0 as with 
your software
             then it work.

Below is very badly written code, but its work :)

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <libavutil/mathematics.h>
#include <libavformat/avformat.h>
#include <libxml/tree.h>
#define MAX_STREAM 2
#define BUFF_SIZE ( 1920 *1080 )
#define STREAM_DURATION   ( 200.0 )
#define STREAM_FRAME_RATE ( 25 )
#define AUDIO_BITRATE ( 64000 )
#define AUDIO_CHANNEL ( 2 )
#define FRAME_SIZE ( 1024 )
#define VIDEO_BITRATE ( 400000 )
#define VIDEO_WIDTH ( 1920 )
#define VIDEO_HEIGHT ( 1080 )
#define VIDEO_GOP ( 12 )
#define OUTPUT_CONTEXT_FORMAT "mpegts"
#define HLS_NUM_CALLBACKS 2

typedef int (*callbackFn)(void *);

struct mux_cfg
{
     int no_of_stream;
     enum AVCodecID  codec_id[MAX_STREAM];
     int audio_sample_rate;
     int video_frame_rate;

     AVStream *st[MAX_STREAM];
     AVFormatContext *oc;
     unsigned char *obuffer;

     //user specific buffer
     unsigned char uobuffer[BUFF_SIZE];
     int uosize;
     int64_t uopts;

     int pts_generator;

};

enum MediaType {
     VIDEO,
     AUDIO
};

struct mediaBuffer{
     int size;
     unsigned char *data ;
     enum MediaType mtype;
     int64_t pts;
     int64_t dts;
};

int init(char *xml);
int start(void);
int get_buffer(void *pOutputData);
int put_buffer(void *pInputData);
int stop(void);
int deinit(void);

struct mux_cfg glb_cfg;

static int mux_write(void* opaque, char*buf, int size);
static int parse_xml(char*xml,struct mux_cfg *cfg);
static int update_input_param(xmlNodePtr ParentNode, struct mux_cfg 
*cfg,xmlDocPtr doc);

static int Muxer_init(struct mux_cfg *loc_cfg, char *xml);
static int Muxer_get_buffer(struct mux_cfg *loc_cfg,void *pOutputData);
static int Muxer_put_buffer(struct mux_cfg *loc_cfg,void *pInputData);
static int Muxer_dinit(struct mux_cfg *loc_cfg);


int init(char *xml)
{
     return Muxer_init(&glb_cfg,xml);
}

int start(void)
{
     return 0;
}

int getCallbackFns(int no, callbackFn* ptr)
{

     int retValue = -1;

     if (no != HLS_NUM_CALLBACKS)
     {
         printf("Error: Invalid input callback number: %d\n", no);
         return retValue;
     }

     if (ptr)
     {
         ptr[0] = put_buffer;
         ptr[1] = get_buffer;
         retValue = 0;
     }
     else
     {
         printf("Error: Invalid pointer passed for callback!\n");
         return retValue;

     }

     return retValue;
}

int get_buffer(void *pOutputData)
{
     return Muxer_get_buffer(&glb_cfg,pOutputData);
}

int put_buffer(void *pInputData)
{
     return Muxer_put_buffer(&glb_cfg,pInputData);
}

int stop(void)
{
     return 0;
}

int deinit(void)
{
     return Muxer_dinit(&glb_cfg);
}

static AVStream *add_stream(AVFormatContext *oc, AVCodec **codec,
                             struct mux_cfg *loc_cfg)
{
     AVCodecContext *c;
     AVStream *st;

     st = avformat_new_stream(oc, *codec);
     if (!st)
     {
         fprintf(stderr, "Could not allocate stream\n");
         exit(1);
     }
     st->id = oc->nb_streams - 1;
     c = st->codec;

     switch ((*codec)->type)
     {
         case AVMEDIA_TYPE_AUDIO:
             c->codec_id = loc_cfg->codec_id[AUDIO];
             c->sample_fmt = AV_SAMPLE_FMT_S16;
             c->bit_rate = AUDIO_BITRATE;
             c->sample_rate = loc_cfg->audio_sample_rate;
             c->channels = AUDIO_CHANNEL;
             c->frame_size = FRAME_SIZE;

             break;

         case AVMEDIA_TYPE_VIDEO:
             c->codec_id = loc_cfg->codec_id[VIDEO];

             c->bit_rate = VIDEO_BITRATE;
             c->width = VIDEO_WIDTH;
             c->height = VIDEO_HEIGHT;
             c->time_base.den = loc_cfg->video_frame_rate;
             c->time_base.num = 1;
             c->gop_size = VIDEO_GOP; /* emit one intra frame every 
twelve frames at most */
             c->pix_fmt = AV_PIX_FMT_YUV420P;
             break;

         default:
             break;
     }

     return st;
}

static int Muxer_init(struct mux_cfg *loc_cfg, char *xml)
{
     int i = 0;
     int ret = 0;
     AVCodec *codec[MAX_STREAM];

     memset(loc_cfg, 0, sizeof(*loc_cfg));
     /* Initialize libavcodec, and register all codecs and formats. */
     av_register_all();

     parse_xml(xml,loc_cfg);

     /* allocate the output media context */
     avformat_alloc_output_context2(&loc_cfg->oc, 
NULL,OUTPUT_CONTEXT_FORMAT, NULL );
     if (!loc_cfg->oc)
     {
         fprintf(stderr,"unable to allocate allocate context\n");
     }

     loc_cfg->obuffer = malloc(BUFF_SIZE);

     loc_cfg->oc->pb = avio_alloc_context(loc_cfg->obuffer, BUFF_SIZE, 
AVIO_FLAG_WRITE,
                                     (void*) loc_cfg,NULL, (void*) 
mux_write, NULL );
     for (i = 0; i < loc_cfg->no_of_stream; i++)
     {
         codec[i] = avcodec_find_encoder(loc_cfg->codec_id[i]);
         if (!(codec[i]))
         {
             fprintf(stderr, "Could not find encoder for '%s'\n",
                     avcodec_get_name(loc_cfg->codec_id[i]));
             return -1;
         }

         loc_cfg->st[i] = add_stream(loc_cfg->oc, &codec[i], loc_cfg);
     }

     ret = avformat_write_header(loc_cfg->oc, NULL );
     if (ret < 0)
     {
         fprintf(stderr, "Error occurred when opening output file: %s\n",
                 av_err2str(ret));
         return 1;
     }

     return 0;
}

static int Muxer_get_buffer(struct mux_cfg *loc_cfg,void *pOutputData)
{

     struct mediaBuffer *buf = (void*) pOutputData;

     if(!loc_cfg)
     {
         errno = EINVAL;
         return -1;
     }

     if(loc_cfg->pts_generator)
     {
         buf->pts = loc_cfg->uopts;
         buf->dts = 0;

     }
     else
     {
         buf->pts = 0;
         buf->dts = 0;
     }

     if (loc_cfg->uosize == 0)
     {
         return 0;
     }

     buf->data = loc_cfg->uobuffer;
     buf->size = loc_cfg->uosize;

     loc_cfg->uosize = 0;

     return buf->size;
}
static int Muxer_put_buffer(struct mux_cfg *loc_cfg,void *pInputData)
{
     struct mediaBuffer *buf = (void*) pInputData;
     int ret;
     AVPacket pkt;

     av_init_packet(&pkt);

     if(!loc_cfg)
         return -1;

     if(!loc_cfg->pts_generator)
     {
         pkt.pts = buf->pts;
         pkt.dts = buf->dts;
     }
     else
     {
//        pkt.pts = 0;
//        pkt.dts = 0;
     }
     pkt.data = buf->data;
     pkt.size = buf->size;

     pkt.stream_index = buf->mtype;

      ret = av_interleaved_write_frame(loc_cfg->oc, &pkt);
     if (ret < 0)
     {
         fprintf(stderr, "av_interleaved_write_frame : %s\n", 
av_err2str(ret));
     }
     loc_cfg->uopts = pkt.pts;
     return ret;
}

static int mux_write(void* opaque, char*buf, int size)
{
     struct mux_cfg *loc_cfg = opaque;
     memcpy(loc_cfg->uobuffer + loc_cfg->uosize, buf, size);
     loc_cfg->uosize += size;
     return 0;

}

int Muxer_dinit(struct mux_cfg *loc_cfg)
{
     int i = 0;
     av_write_trailer(loc_cfg->oc);


     for(i = 0;i< loc_cfg->no_of_stream ;i++)
     {
         avcodec_close(loc_cfg->st[i]->codec);
     }
     av_free(loc_cfg->oc->pb);
     /* free the stream */
     avformat_free_context(loc_cfg->oc);

     return 0;

}


static int parse_xml(char*xml,struct mux_cfg *cfg)
{
     int ret = 0;
     xmlDocPtr doc;
     xmlNodePtr nl1;

     if(!xml || !cfg)
     {
         ret= -1;
         return ret;
     }
     doc = xmlParseFile(xml);
     if (doc == NULL)
     {
         ret= -1;
         return ret;

     }
     for (nl1 = doc->children; nl1 != NULL; nl1 = nl1->next)
     {
         ret = xmlStrcmp(nl1->name, (const xmlChar *) "INPUT");
         if (ret == 0)
         {
             update_input_param(nl1,cfg,doc);
         }
     }

     xmlFreeDoc(doc);
     return ret;
}
static int update_input_param(xmlNodePtr ParentNode, struct mux_cfg 
*cfg,xmlDocPtr doc)
{

     xmlNodePtr nl = ParentNode->children;
     char *pXmlGetString = NULL;

     int ret = 0;
     for (; nl != NULL; nl = nl->next)
     {
         ret = xmlStrcmp(nl->name, (const xmlChar *) "no_of_elem_stream");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             sscanf(pXmlGetString, "%d", &cfg->no_of_stream);
             xmlFree(pXmlGetString);

         }

         ret = xmlStrcmp(nl->name, (const xmlChar *) "audio_codec");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             if(!strcmp(pXmlGetString,"aac"))
             {
                 cfg->codec_id[AUDIO] = AV_CODEC_ID_AAC;
             }
             xmlFree(pXmlGetString);
         }

         ret = xmlStrcmp(nl->name, (const xmlChar *) "video_codec");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             if(!strcmp(pXmlGetString,"h264"))
             {
                 cfg->codec_id[VIDEO] = AV_CODEC_ID_H264;
             }
             xmlFree(pXmlGetString);

         }

         ret = xmlStrcmp(nl->name, (const xmlChar *) "audio_sample_rate");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             sscanf(pXmlGetString, "%d", &cfg->audio_sample_rate);
             xmlFree(pXmlGetString);

         }

         ret = xmlStrcmp(nl->name, (const xmlChar *) "video_frame_rate");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             sscanf(pXmlGetString, "%d", &cfg->video_frame_rate);
             xmlFree(pXmlGetString);

         }

         ret = xmlStrcmp(nl->name, (const xmlChar *) "pts_generator");
         if (ret == 0)
         {
             pXmlGetString = (char *) xmlNodeListGetString(doc,
nl->xmlChildrenNode, 1);
             if(!strcmp(pXmlGetString,"TRUE") || 
!strcmp(pXmlGetString,"true"))
             {
                 cfg->pts_generator = 1;
             }
             xmlFree(pXmlGetString);

         }


     }
     return ret;
}







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From praks411 at gmail.com  Fri Aug 23 14:56:27 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Fri, 23 Aug 2013 05:56:27 -0700 (PDT)
Subject: [Libav-user] Frame decoding and sw_scale timings for HD video
Message-ID: <1377262587420-4658429.post@n4.nabble.com>

Hi,

I'm working on application which uses both ffmpeg and ffms (wrapper on
ffmpeg) for decoding video file.
The decoding audio and video is then played on user interface. 
For low resolution video till 640x360p both audio and video works fine and
frame rate is maintained as per source file.
However when video frame size increases 1280x720p, I'm not able to achieve
desire frame rate and since audio is synchronized to video, audio quality is
decreasing which lots of breaks.
After analyzing the timings of critical function in my filter chain I found
that, though av_read_frame and avcodec_decode_video2 takes almost same time
for both 640x360 and 1280x720, there is considerable difference for
sws_scale() function. 
Please someone suggest is there a way to reduce computation time of
sws_scale. 
Audio decoding is taking constant time for both 640x360p and 1280x720p
video. Though I'm working to further reduce its timing.

Also if someone has some other ideas on how to reduce overall time, to
achieve desire frame rate without compromising on audio quality please let
me know. 

Thanks and Regards,
Pradeep



--
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From donmoir at comcast.net  Fri Aug 23 23:49:14 2013
From: donmoir at comcast.net (Don Moir)
Date: Fri, 23 Aug 2013 17:49:14 -0400
Subject: [Libav-user] Frame decoding and sw_scale timings for HD video
References: <1377262587420-4658429.post@n4.nabble.com>
Message-ID: <6080936DA4E042AF91DF1F3933BBBEFD@MANLAP>

> Hi,
>
> I'm working on application which uses both ffmpeg and ffms (wrapper on
> ffmpeg) for decoding video file.
> The decoding audio and video is then played on user interface.
> For low resolution video till 640x360p both audio and video works fine and
> frame rate is maintained as per source file.
> However when video frame size increases 1280x720p, I'm not able to achieve
> desire frame rate and since audio is synchronized to video, audio quality is
> decreasing which lots of breaks.
> After analyzing the timings of critical function in my filter chain I found
> that, though av_read_frame and avcodec_decode_video2 takes almost same time
> for both 640x360 and 1280x720, there is considerable difference for
> sws_scale() function.
> Please someone suggest is there a way to reduce computation time of
> sws_scale.
> Audio decoding is taking constant time for both 640x360p and 1280x720p
> video. Though I'm working to further reduce its timing.
>
> Also if someone has some other ideas on how to reduce overall time, to
> achieve desire frame rate without compromising on audio quality please let
> me know.

What image system are you using for the final display ? What is the PixFormat of the video ?

You should decode and output audio in separate thread. In case video decoding is held up, this will allow audio to sound fine.

Beyond this you may need to do frame dropping. Most will implement this by not displaying a frame. This generally does not work 
since the bottle neck may be in decoding, etc. Other forms of frame dropping get a bit tricky and you need to be careful. 


From alexcohn at netvision.net.il  Sat Aug 24 00:12:03 2013
From: alexcohn at netvision.net.il (Alex Cohn)
Date: Sat, 24 Aug 2013 01:12:03 +0300
Subject: [Libav-user] Frame decoding and sw_scale timings for HD video
In-Reply-To: <1377262587420-4658429.post@n4.nabble.com>
References: <1377262587420-4658429.post@n4.nabble.com>
Message-ID: <CADiKgojeyuVQRFRM1_5J+1TC=XM1qi5Ty49uqh3tqAfbChAYeA@mail.gmail.com>

On Aug 23, 2013 5:18 PM, "Pradeep Karosiya" <praks411 at gmail.com> wrote:
>
> Hi,
>
> I'm working on application which uses both ffmpeg and ffms (wrapper on
> ffmpeg) for decoding video file.
> The decoding audio and video is then played on user interface.
> For low resolution video till 640x360p both audio and video works fine and
> frame rate is maintained as per source file.
> However when video frame size increases 1280x720p, I'm not able to achieve
> desire frame rate and since audio is synchronized to video, audio quality
is
> decreasing which lots of breaks.
> After analyzing the timings of critical function in my filter chain I
found
> that, though av_read_frame and avcodec_decode_video2 takes almost same
time
> for both 640x360 and 1280x720, there is considerable difference for
> sws_scale() function.
> Please someone suggest is there a way to reduce computation time of
> sws_scale.
> Audio decoding is taking constant time for both 640x360p and 1280x720p
> video. Though I'm working to further reduce its timing.
>
> Also if someone has some other ideas on how to reduce overall time, to
> achieve desire frame rate without compromising on audio quality please let
> me know.
>
> Thanks and Regards,
> Pradeep

I would suggest to use audio as the yardstick and synchronize video
playback accordingly, not the other way round.

This may sometimes lead to decision to drop a video frame to compensate for
delay caused by CPU throughput. You can skip sws_scale for frames that will
not be displayed. It's possible that reducing the frame rendering rate from
30 to 25 FPS will allow to keep video stream at pace with audio, with
insignificant effect on himan percrption.

As for optimizations, please describe what hardware you are using,  this
may have a serious influence on the expected max performance.

BR
Alex
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From cehoyos at ag.or.at  Sat Aug 24 16:32:38 2013
From: cehoyos at ag.or.at (Carl Eugen Hoyos)
Date: Sat, 24 Aug 2013 14:32:38 +0000 (UTC)
Subject: [Libav-user]
	=?utf-8?q?Frame_decoding_and_sw=5Fscale_timings_for_?=
	=?utf-8?q?HD_video?=
References: <1377262587420-4658429.post@n4.nabble.com>
	<CADiKgojeyuVQRFRM1_5J+1TC=XM1qi5Ty49uqh3tqAfbChAYeA@mail.gmail.com>
Message-ID: <loom.20130824T163156-623@post.gmane.org>

Alex Cohn <alexcohn at ...> writes:

> As for optimizations, please describe what hardware 
> you are using,? this may have a serious influence 
> on the expected max performance.

This is not wrong, even more interesting imo would be 
the format of the video (and audio) the OP is trying 
to decode faster.

Carl Eugen


From minodev38 at gmail.com  Sun Aug 25 15:48:54 2013
From: minodev38 at gmail.com (MinoDev)
Date: Sun, 25 Aug 2013 15:48:54 +0200
Subject: [Libav-user] Muxing/Demuxing h264 in mp4 container
Message-ID: <521A0B46.1010408@gmail.com>

Hi,

I'm new in ffmpeg and I'm trying to demux then mux a dummy mp4 video.
The video is encoded in h264 and the audio in aac.
I started with the example in the doc to demux. It works fine but I 
can't read it because my h264 file hasn't any annex b headers.
So I tried to use a h264_mp4toannex bsf filter without any success. I 
didn't understand how to implement this filter in the demuxing.c code 
example.

I'am sorry for the silly question but I just need some clarification 
about my attempts.

I also would like to know if it's possible to directly mux the h264 
video and aac audio without applying a mp4toannexb filter to a mp4 
container.

In command line I use this working cmd to test the demux :

ffmpeg -i file.mp4 -vcodec copy -vbsf h264_mp4toannexb -an -f h264 test.h264

From praks411 at gmail.com  Mon Aug 26 11:01:43 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Mon, 26 Aug 2013 02:01:43 -0700 (PDT)
Subject: [Libav-user] Frame decoding and sw_scale timings for HD video
In-Reply-To: <loom.20130824T163156-623@post.gmane.org>
References: <1377262587420-4658429.post@n4.nabble.com>
	<CADiKgojeyuVQRFRM1_5J+1TC=XM1qi5Ty49uqh3tqAfbChAYeA@mail.gmail.com>
	<loom.20130824T163156-623@post.gmane.org>
Message-ID: <1377507703709-4658434.post@n4.nabble.com>

Hi All,

Thanks for all your suggestion. I'm considering using audio to synchronizing
video instead of other way round. ?Though this may lead to frame dropping it
is fine for me as long as audio sound good during play.
For final display frames are converted into Iplimage image pointer and then
displayed on wxWidgets UI framework.
I'm running on windows 7 64bit acer notebook, intel core i5 processor 8GB
ram with nvidia graphic of 2gb memory.

Thanks and Regards,
Pradeep



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From soho123.2012 at gmail.com  Mon Aug 26 17:15:36 2013
From: soho123.2012 at gmail.com (Huang Soho)
Date: Mon, 26 Aug 2013 23:15:36 +0800
Subject: [Libav-user] ffserver occupy a lot of CPU time while streaming
Message-ID: <CAFd2cZVhdSJBLOPb8iasRyk=CeodxvUSgjFGf4GxtirBF4TPTA@mail.gmail.com>

Hi All,


I use ffmpeg+ ffserver for a stream server.
I use "top" to check CPU usage when I use ffserver to stream output.
I can see ffserver occpuy about 67% and ffmpeg occupy about 30%
it is almost 100% when I stream out

does anyone have idea?
is there any patch for that?
I use the head master vertsion
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From praks411 at gmail.com  Mon Aug 26 18:00:03 2013
From: praks411 at gmail.com (Pradeep Karosiya)
Date: Mon, 26 Aug 2013 09:00:03 -0700 (PDT)
Subject: [Libav-user] Frame decoding and sw_scale timings for HD video
In-Reply-To: <1377507703709-4658434.post@n4.nabble.com>
References: <1377262587420-4658429.post@n4.nabble.com>
	<CADiKgojeyuVQRFRM1_5J+1TC=XM1qi5Ty49uqh3tqAfbChAYeA@mail.gmail.com>
	<loom.20130824T163156-623@post.gmane.org>
	<1377507703709-4658434.post@n4.nabble.com>
Message-ID: <1377532803712-4658436.post@n4.nabble.com>

Hi,

One of the things which I couldn't mention in my previous mail was that in
my application.
I've two video decoder one is based on ffms2 (a wrapper over ffmpeg/libav)
and the other is based on ffmpeg.
Initially I had just ffmpeg based video loader but since I was facing issues
with seeking I shifted to ffms but ffmpeg is also. I can chose between the
two whenever I want to play a video file.
The problem which I have describe is specifically with ffms2 use of
sws_scale function. I've modified the code of ffms2 so that code for both
ffms and ffmpeg base decoder are same for playing video.
After analysing the timings of two decoder, I found that sws_scale used in
ffms is taking 15milisec whereas ffmpeg use of sws_scale take 2milisec, all
the parameters in both cases are same for same video file without playing
any audio. (audio decoding is taking constant irrespective of frame size can
be enabled or disabled)
The only difference which I think is that ffms2 is loading as dll whereas in
case of ffmpeg it is statically. But I think this shouldn't matter.
Please share your thoughts.

Thanks and Regards,
Pradeep




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From lovell.joshyyy at gmail.com  Mon Aug 26 18:26:20 2013
From: lovell.joshyyy at gmail.com (Josh Branning)
Date: Mon, 26 Aug 2013 17:26:20 +0100
Subject: [Libav-user] RTP example?
Message-ID: <521B81AC.9050909@gmail.com>

Hello,

I can't figure out how to use RTP in libavformat. I have taken a look at
ffserver.c, whose includes are internal to ffmpeg and also this guide:
http://plagatux.es/2011/07/using-libav-library/ , which appears to be
old (I'm getting a lot of deprecated warnings).

So I was basically wondering if there are any good examples of sending,
and receiving, over RTP. Or if anyone has any code they would like to share.

Any help with this much appreciated,


Josh.

From samitha.wijedasa at yahoo.com  Tue Aug 27 16:23:58 2013
From: samitha.wijedasa at yahoo.com (Samitha Wijedasa)
Date: Tue, 27 Aug 2013 07:23:58 -0700 (PDT)
Subject: [Libav-user] extracting the subtitle stream to a file using the C
	API
Message-ID: <1377613438.88940.YahooMailNeo@web163605.mail.gq1.yahoo.com>

Hi,

Is there a example on extracting the subtitle stream to a 
file using the C API function of ffmpeg libraries. Currently we have 
examples for video and audo (ex: filtering_video.c)
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From andrey2067 at gmail.com  Wed Aug 28 10:25:49 2013
From: andrey2067 at gmail.com (Andrey Mochenov)
Date: Wed, 28 Aug 2013 11:25:49 +0300
Subject: [Libav-user] AAC muxing into two different files in the same loop:
	The 2nd file is corrupted.
Message-ID: <CACg7hcs9s4yLKVhDi_0CdFyjN=7cQN5-CtRdF8vyyqnZiAXcoA@mail.gmail.com>

Hi everyone,

We are using FFmpeg libraries git-ee94362 libavformat v55.2.100.
Our purpose is to mux synthetic video and audio-file audio to 2 different
files (in the same loop)
with the the same format and parameters.

With MP3 input, both M3U8 outputs are OK:
Output file #0: Total number of frames is: video = 229, audio = 347.
Output file #1: Total number of frames is: video = 229, audio = 347.

But with AAC input, the 1st M3U8 output is OK, whereas the 2nd one - is not:
Output file #0: Total number of frames is: video = 403, audio = 690.
Output file #1: Total number of frames is: video =   3, audio = 690.

It is exactly the same code in the main loop. We do not use the
"aac_adtstoasc" filter in case of M3U output.
By the way, the problem exist both with and without the filter,
since in case of MP4 output, the 1st output file is OK, whereas the 2nd one
- is not, - as well.

Moreover, I have implemented the main loop as Windows threads, separated
for every output file.
The problem remains!

It seems that video PTS begins to be corrupted (wrong-calculated) for the
2nd (3rd, etc.) output file.

Our question: If somebody is known about such a problem? If yes, what can
be a solution/workaround?
Thank you.
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From kristen.schat at movares.nl  Thu Aug 29 09:31:34 2013
From: kristen.schat at movares.nl (Schat K (Kristen))
Date: Thu, 29 Aug 2013 09:31:34 +0200
Subject: [Libav-user] rtsp_flags listen does that mean ffmpeg can run as
	server?
Message-ID: <142A21F16BFFD54783F64D419C94CD360109DE149A5B@NLUTRVSE01.nl.hr.group>

Can libav run as it's own rtsp server and at the same time stream frames?
Cmd line -rtsp_flags listen is that the correct way to go about it?

Regards,
Kristen


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