[Ffmpeg-cvslog] CVS: ffmpeg/libavformat oggparseogm.c, NONE, 1.1 Makefile, 1.129, 1.130 ogg2.c, 1.13, 1.14 ogg2.h, 1.4, 1.5

[Måns Rullgård]

M?ns Rullg?rd <mru at inprovide.com> writes:

> Diego Biurrun <diego at biurrun.de> writes:
>
>> On Fri, May 12, 2006 at 01:07:25AM +0200, M?ns Rullg?rd CVS wrote:
>>> 
>>> Modified Files:
>>> 	Makefile ogg2.c ogg2.h 
>>> Added Files:
>>> 	oggparseogm.c 
>>> Log Message:
>>> ogm demuxing
>>
>> Excellent, we're getting closer to making libavformat a replacement for
>> other demuxer libs one step at a time.
>>
>> Here is a sample that still has problems:
>>
>> http://www.mplayerhq.hu/MPlayer/samples/ogg/basicinstinct.ogm
>>
>> There is no sound, only the the following message:
>> [vorbis @ 0x102b6138]Extradata corrupt.
>
> I've figured that one out.  The vorbis extradata is split across three
> packets, and the video data starts after the first of these.  This is
> in violation of the ogg spec, which states that all extradata of all
> streams must precede any non-extradata packets of any stream.  I guess
> we should still deal with it somehow.  For some reason, it works with
> tcvp.  I'm trying to figure out why.

Got it.  TCVP doesn't initialize the codec until the first data packet
has been read, by which time all extradata will have been accumulated.

Any ideas how we could make this work in lavf?

-- 
M?ns Rullg?rd
mru at inprovide.com