[FFmpeg-user] BUG in use of extradata and extradata_size with dvb subtitles and teletext

[Clément Bœsch]

On Thu, Dec 19, 2013 at 03:26:44PM +0000, JULIAN GARDNER wrote:
> 
> 
> 
> 
> ----- Original Message -----
> > From: Clément Bœsch <u at pkh.me>
> > To: FFmpeg user questions <ffmpeg-user at ffmpeg.org>
> > Cc: 
> > Sent: Thursday, 19 December 2013, 16:07
> > Subject: Re: [FFmpeg-user] BUG in use of extradata and extradata_size with dvb subtitles and teletext
> > 
> > On Thu, Dec 19, 2013 at 02:01:57PM +0000, JULIAN GARDNER wrote:
> >>  Im trying to work though the problems we have in converting 
> > teletext/dvbsubs to the various systems,
> >> 
> > 
> > Cool, I'm looking forward this.
> > 
> > [...]
> >>  2. dvbsubs reencoded FAILS
> >> 
> > [...]
> >>  3. dvbsubs copied FAILS
> >> 
> >>  Command line
> >>  ffmpeg -i ../testStreams/bbc.ts -c:v libx264 -b:v 1300k -c:s copy -y -f 
> > mpegts a_dvb.ts
> >> 
> >>  This runs though the encode cycle but i have yet to find anything, 
> > vlc/ffplay/etc that will show the subtitles. Get "invalid subtitle stream 
> > id" in vlc
> >> 
> >>  Any ideas on the problem in number 2?
> >> 
> >>  I get onto number 3 when i have number 2 fixed.
> >> 
> > 
> > Don't you think you should look at the the remuxing problem (3) instead of
> > the encoding first, since you need a correct demuxing/muxing for testing
> > this?
> 
> Remuxing problems go away as soon as you remove the hack in ffmpeg.c for doing the dual packet!

Isn't the dual packet hack only called with transcoding?

Also, we should move this discussion to ffmpeg-devel.

[...]

-- 
Clément B.
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