[FFmpeg-devel] mpegts.c

[Michael Niedermayer]

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.

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I have never wished to cater to the crowd; for what I know they do not
approve, and what they approve I do not know. -- Epicurus
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