Bug#781812: [libav-devel] Bug#781812: libav

[Anton Khirnov]

Hi,
Quoting Reinhard Tartler (2015-04-05 02:09:23)
> Control: forwarded -1 libav-deve at lists.libav.org
> 
> Hi Mathieu,
> 
> I would appreciate if in future you could provide a bit more details
> when reassigning bugs. The quote below was all that I had to start
> working on this issue, which is terse.
> 
> My understanding of this we are talking about a curious feature in the
> MKV container: apparently, you can attach cover art into the
> container. Libavformat allows applications to access embedded images
> by providing an extra stream.
> 
> Please someone correct me, but my understanding of
> http://git.videolan.org/?p=ffmpeg.git;a=commit;h=511585c is that
> libavformat implements this inconsistently for different containers. I
> wonder how did this happen, is there some deeper reason for  this
> inconsistency? Minidlna seems to have stumbled over this inconsistency
> and seems to work fine with that patch that was discussed with FFmpeg,
> but not with Libav. This is a bit disappointing, maybe you could
> forward such clearly upstream bugs yourself to avoid having the
> package maintainers as extra round-trip? Thanks.
> 
> I do not use minidlna myself, so I cannot verify this issue myself.
> However, I've tried to apply the patch that was submitted against
> FFmpeg, which I have attached to this email. I've also compared the
> output of "avprobe" on the suggested test sample
> https://sourceforge.net/projects/matroska/files/test_files/cover_art.mkv
> with and without the patch. It seems promising to me, but again, I
> have no means to verify this issue, so please someone else take over
> of testing it and getting the patch ready for submission in Libav.

Thanks for bringing this up, I've pushed it to master after consulting
with the author and fixing a small bug in it.

-- 
Anton Khirnov