Bug#781812: libav

[Reinhard Tartler]

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,
Reinahrd

On Sat, Apr 4, 2015 at 11:09 AM, Mathieu Malaterre <malat at debian.org> wrote:
> reassign 781812 libav 6:11.3-1
> thanks
>
> This has been fixed in ffmpeg:
>
> https://trac.ffmpeg.org/ticket/4423#comment:8
>
> Since minidlna currently uses libav, I am leaving this bug open.
>
> _______________________________________________
> pkg-multimedia-maintainers mailing list
> pkg-multimedia-maintainers at lists.alioth.debian.org
> http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/pkg-multimedia-maintainers



-- 
regards,
    Reinhard
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