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

[JULIAN GARDNER]

----- Original Message -----
> From: Clément Bœsch <u at pkh.me>
> To: FFmpeg user questions <ffmpeg-user at ffmpeg.org>
> Cc: 
> Sent: Thursday, 19 December 2013, 16:29
> Subject: Re: [FFmpeg-user] BUG in use of extradata and extradata_size with dvb subtitles and teletext
> 
> 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.
> 
AHHHHHHHHH

> [...]
> 
> -- 
> Clément B.
>