Michael Niedermayer: > On Sun, Feb 17, 2019 at 09:53:03AM +0000, Steve Lhomme wrote: >> ffmpeg | branch: master | Steve Lhomme <rob...@ycbcr.xyz> | Wed Feb 13 >> 13:20:45 2019 +0100| [9326117bf63b04a466d9e787224e56ba8cdbb215] | committer: >> Michael Niedermayer >> >> avformat/matroskadec: Check parents remaining length >> >> This was found through the Hacker One program on VLC but is not a security >> issue in libavformat >> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> >> >>> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9326117bf63b04a466d9e787224e56ba8cdbb215 >> --- >> >> libavformat/matroskadec.c | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) > > this detects an issue in ffmpeg generated mkv: > > ./ffmpeg -f lavfi -i color=black -pix_fmt yuv422p10le -bitexact -vframes 1 > -c:v ffv1 -level 3 -y fff.mkv && ./ffmpeg -i fff.mkv -f null - > > [matroska,webm @ 0x35e9040] Invalid length 0x17 > 0x9b0 in parent > This is a known bug introduced by that commit; the error message is harmless, but bogus. I have already sent a patchset [1] to fix this very issue (and some other stuff I found while reading the Matroska demuxer's code). You even replied to it and you merged one of the commits (which changed the error message a bit, but did not prevent the bogus error).
Said patchset was in turn reviewed by Steve Lhomme in April. I am nearly done with incorporating his review into an updated patchset. You can already take a look if you want: [2]. It fixes this error message (among other things). - Andreas [1]: https://ffmpeg.org/pipermail/ffmpeg-devel/2019-March/240806.html is the original mail, explaining the reason for the error. https://ffmpeg.org/pipermail/ffmpeg-devel/2019-March/241694.html is the link to the first version including a (now outdated) patch to fix this. [2]: https://github.com/mkver/FFmpeg/commits/matroska_demuxer_8 "Redo level handling" is the commit that fixes the error message. _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
