[Libav-user] This command take 2 minutes to render. Can it be quicker?

[Steve Boyer]

On Fri, May 30, 2014 at 2:29 AM, Vijay Kanta <viju.kantah at gmail.com> wrote:

>  On 05/29/2014 06:54 PM, Steve Boyer wrote:
>
> On Thu, May 29, 2014 at 8:04 AM, Vijay Kanta <viju.kantah at gmail.com>
> wrote:
>
>>   On 05/28/2014 06:15 PM, Steve Boyer wrote:
>>
>>   On Wed, May 28, 2014 at 3:34 AM, Vijay Kanta <viju.kantah at gmail.com>
>> wrote:
>>
>>>  On 05/28/2014 05:17 AM, Carl Eugen Hoyos wrote:
>>>
>>>> Vijay Kanta <viju.kantah at ...> <viju.kantah at ...> writes:
>>>>
>>>>  Can it be quicker and less resource
>>>>> hungry by altering the following command?
>>>>>
>>>>> :~$ /usr/local/bin/ffmpeg -i /link/to/music.mp3
>>>>> -i /link/to/video.mp4 -vcodec libx264 -crf 23
>>>>> -vf subtitles=/link/to/subtitles.srt -strict -2
>>>>> /link/to/muxed.mp4
>>>>>
>>>> This is missing console output but at least
>>>> -preset ultrafast (and friends) come to
>>>> mind.
>>>>
>>>
>>  This command will (if I understand correctly) transcode your audio.
>> Using "-c:a copy" will copy the audio.mp3 into the muxed.mp4 container.
>> Same thing with "-c:v copy" as the video.mp4 is (obviously) already in an
>> MP4 container, it should be a trivial matter to mux the two streams into a
>> single MP4.
>>
>>
>>>   Carl Eugen
>>>>
>>>> _______________________________________________
>>>> Libav-user mailing list
>>>> Libav-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>>>
>>>  Sorry, what do you mean by missing console output? This command does
>>> output to the shell.
>>>
>>
>>  It would help us even more if you could provide what your console
>> outputs when the command runs.
>>
>>
>>> Regards,
>>> ~Vijay.
>>>
>>>   Steve
>>
>>
>> _______________________________________________
>> Libav-user mailing listLibav-user at ffmpeg.orghttp://ffmpeg.org/mailman/listinfo/libav-user
>>
>>   Hey, it doesn't work or I couldn't do it properly. Here's the command
>> and output.
>>
>> FFMPEG-COMMAND: /usr/local/bin/ffmpeg -i music/qT0pdDhKxFDnfJHq2.mp3 -c:a
>> copy -i video/HKp1ZpHbANT4dmGRC.mp4 -vcodec libx264 -crf 23 -vf
>> subtitles=subtitles/1718379803.srt -preset ultrafast -strict -2
>> film/HKp1ZpHbANT4dmGRC.mp4
>> ffmpeg version 2.1.1 Copyright (c) 2000-2013 the FFmpeg developers
>>   built on Dec 15 2013 14:17:24 with gcc 4.4.5 (Ubuntu/Linaro
>> 4.4.4-14ubuntu5)
>>   configuration: --enable-libass --enable-shared --enable-libx264
>> --enable-gpl
>>   libavutil      52. 48.101 / 52. 48.101
>>   libavcodec     55. 39.101 / 55. 39.101
>>   libavformat    55. 19.104 / 55. 19.104
>>   libavdevice    55.  5.100 / 55.  5.100
>>   libavfilter     3. 90.100 /  3. 90.100
>>   libswscale      2.  5.101 /  2.  5.101
>>   libswresample   0. 17.104 /  0. 17.104
>>   libpostproc    52.  3.100 / 52.  3.100
>> Input #0, mp3, from 'music/qT0pdDhKxFDnfJHq2.mp3':
>>   Metadata:
>>     title           : Legendary
>>     artist          : Oval
>>     album           : Ringtone EP
>>     track           : 1
>>   Duration: 00:00:50.86, start: 0.000000, bitrate: 128 kb/s
>>     Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
>> Unknown decoder 'copy'
>>
>
>  Vijay, Can you send me the input files so I can help come up with a fix?
> I am away from my home computer where I have a variety of mp4s and mp3s to
> test with. To me, this SHOULDN'T fail, so I am curious to see this myself.
>
> Steve
>
>
>>  Regards,
>> ~Vijay.
>>
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
>>
>
>
> _______________________________________________
> Libav-user mailing listLibav-user at ffmpeg.orghttp://ffmpeg.org/mailman/listinfo/libav-user
>
>  Hey Steve,
>
> I am wondering how the media can help solve a command format.
>

It was a suggestion, because I would then be able to use the exact files
you are tying to use without having to guess at codecs that were used to
encode them beforehand, test 5-6 other things and then come back and tell
you what worked best for me, and give you the command that would work for
you. I've noticed there's about a significant delay between us and thought
that this would help speed things up.


> Regards,
> ~Vijay.
>

Steve


> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://ffmpeg.org/pipermail/libav-user/attachments/20140530/da0c0aee/attachment.html>