#9886: ffmpeg does not warn about broken multiplexing
-------------------------------------+-------------------------------------
Reporter: eram | Owner: (none)
Type: enhancement | Status: new
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Description changed by eram:
Old description:
> Summary of the bug:
> How to reproduce:
> {{{
> % ffmpeg -y -i bad-interleaving.mkv -c:v libx264 -crf 23 -preset medium
> -c:a aac -b:a 128k -v trace output.mp4 1>ffmpeg.stdout 2>ffmpeg.stderr
> }}}
>
> The file bad-interleaving.mkv has an interleaving problem at 18:32 where
> the video gets stuck bud the audio keeps playing. Video playback resumes
> later at 34:37. Both input and output files have the exact same issue.
> mplayer successfully reports this problem during playback:
> {{{
> % mplayer bad-interleaving.mkv
> MPlayer SVN-r38359 (C) 2000-2022 MPlayer Team
> 226 audio & 469 video codecs
> [...]
> Possibly bad interleaving detected.
> Use -ni option if this causes playback issues and avoid or fix the
> program that created the file.
> [...]
> Exiting... (Quit)
> }}}
>
> I think that ffmpeg.stderr at line 108031 could mention something about
> it, but not sure if it's warning enough:
> {{{
> 108030# frame=26488 fps= 67 q=40.0 size= 132352kB time=00:18:39.37
> bitrate= 968.6kbits/s dup=0 drop=184 speed=2.85x
> 108031# [mp4 @ 0x55a47535e500] Delay between the first packet and last
> packet in the muxing queue is 10008163 > 10000000: forcing output
> }}}
>
> Sample file and full logs:
>
> https://mega.nz/folder/YWsxDDaT#4vA-cpnBQU32vkd9BmI3mQ
New description:
Summary of the bug:
How to reproduce:
{{{
% ffmpeg -y -i bad-interleaving.mkv -c:v libx264 -crf 23 -preset medium
-c:a aac -b:a 128k -v trace output.mp4 1>ffmpeg.stdout 2>ffmpeg.stderr
}}}
The file bad-interleaving.mkv has an interleaving problem at 18:32 where
the video gets stuck bud the audio keeps playing. Video playback resumes
later at 34:37. Both input and output files have the exact same issue.
mplayer successfully reports this problem during playback:
{{{
% mplayer bad-interleaving.mkv
MPlayer SVN-r38359 (C) 2000-2022 MPlayer Team
226 audio & 469 video codecs
[...]
Possibly bad interleaving detected.
Use -ni option if this causes playback issues and avoid or fix the program
that created the file.
[...]
Exiting... (Quit)
}}}
I think that ffmpeg.stderr at line 108031 could mention something about
it, but not sure if it's warning enough:
{{{
108030# frame=26488 fps= 67 q=40.0 size= 132352kB time=00:18:39.37
bitrate= 968.6kbits/s dup=0 drop=184 speed=2.85x
108031# [mp4 @ 0x55a47535e500] Delay between the first packet and last
packet in the muxing queue is 10008163 > 10000000: forcing output
}}}
Sample file and full logs:
https://mega.nz/file/gfI00QyR#yHAlwsDaTm-3jsxcscoy2ZksBV33VUitxUN0j9lJDKQ
--
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Ticket URL: <https://trac.ffmpeg.org/ticket/9886#comment:8>
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