[FFmpeg-devel] mpegts.c

[Michael Niedermayer]

On Wed, Oct 17, 2012 at 08:40:02AM +0100, JULIAN GARDNER wrote:
> 
> 
> 
> 
> 
> 
> 
> >________________________________
> > From: Michael Niedermayer <michaelni at gmx.at>
> >To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org> 
> >Sent: Wednesday, 17 October 2012, 3:23
> >Subject: Re: [FFmpeg-devel] mpegts.c
> > 
> >On Wed, Oct 10, 2012 at 06:35:29PM +0100, JULIAN GARDNER wrote:
> >> 
> >> 
> >> ----- Original Message -----
> >> 
> >> > From: Michael Niedermayer <michaelni at gmx.at>
> >> > To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org>
> >> > Cc: 
> >> > Sent: Wednesday, 10 October 2012, 2:07
> >> > Subject: Re: [FFmpeg-devel] mpegts.c
> >> > 
> >> > On Wed, Oct 10, 2012 at 12:05:10AM +0100, JULIAN GARDNER wrote:
> >> >>  ________________________________
> >> >> 
> >> >>  > From: Michael Niedermayer <michaelni at gmx.at>
> >> >>  >To: FFmpeg development discussions and patches 
> >> > <ffmpeg-devel at ffmpeg.org> 
> >> >>  >Sent: Wednesday, 10 October 2012, 0:24
> >> >>  >Subject: Re: [FFmpeg-devel] mpegts.c
> >> >>  > 
> >> >>  >On Tue, Oct 09, 2012 at 08:46:03PM +0100, JULIAN GARDNER wrote:
> >> >>  >> Im fixing a few problems in mpegts decoding and i need a little 
> >> > help.
> >> >>  >> 
> >> >>  >> I want to add an auto MAP function so you can say that you want 
> >> > audio in gre, for greek, and the mpegts system will scan the pmt and find this 
> >> > and set the mapping up correctly to use greek, but i have 2 options.
> >> >>  >> 
> >> >>  >> 1. remap the pids so the correct one is at the start of the stream 
> >> > list
> >> >>  >> 
> >> >>  >> 2. same idea as -map, but will need a little hand here
> >> >>  >
> >> >>  >i think this is best done outside mpegts similarly to -map
> >> >>  >
> >> >> 
> >> >> 
> >> >>  So where would be the best place to add this?
> >> > 
> >> > look at avformat_match_stream_specifier()
> >> > if i understood you correctly it can be implemented in that quite
> >> > easily
> >> 
> >> Thanks again, code in and working for this with one caveat, if i do a like like this, ive used ! as the language marker, dont know if this is ok, if you would like something different just let me know
> >> 
> >> ffmpeg -i xx.ts -b v:1000k -map "!a:eng" -f mpegts -t a.ts
> >> 
> >> I lose the video stream, and then need to add a -map 0:0 which causes problems when the video is not the 1st stream, can you think of a way around this?
> >
> >the code just has to select a matching stream bundle not just a audio
> >stream. This can be made depedant on "a" being specified so if we
> >assume "!" is used then -map !a:eng would just select a audio stream
> >while -map !:eng would select a full stream bundle of audio+video.
> >
> Thats the problem, most video streams dont come with a language per se, as i have only come accross 1 channel in 15 years that has more than 1 video pid in the pmt.

asking for "eng" could select all english streams and all streams
without a language specification.

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Freedom in capitalist society always remains about the same as it was in
ancient Greek republics: Freedom for slave owners. -- Vladimir Lenin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 198 bytes
Desc: Digital signature
URL: <http://ffmpeg.org/pipermail/ffmpeg-devel/attachments/20121017/0498f601/attachment.asc>