#9970: h264_qsv internal bug message on valid h264 video file
---------------------------------+--------------------------------------
Reporter: jorgev | Type: defect
Status: new | Priority: normal
Component: avcodec | Version: git-master
Keywords: QSV | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Summary of the bug:
I've come across a video file which hits a decode error that looks like
the following:
{{{
[h264_qsv @ 0x561849930140] Error during QSV decoding.: undefined behavior
(-16)
Error while decoding stream #0:0: Internal bug, should not have happened
}}}
This error does not occur when decoding with libx264 and seems specific to
running ffmpeg with `-hwaccel qsv`. Running ffmpeg with `-c:v h264_qsv`
directly specified instead of hwaccel completes successuflly both when
compiled with libmfx and libvpl. I unfortunately cannot immediately post
the file which produces this error but I will work on trying to get one
that does.
How to reproduce:
Currently I'm only able to reproduce with a video file that is not public,
but here is an example of the output shown by ffmpeg when run with this
file. Fortunately with the sample file, the error reproduces fairly
trivially:
{{{
% ffmpeg-libmfx -report -loglevel debug -hwaccel qsv -i badfile-short.mp4
-f null -
...
[h264_qsv @ 0x55b72b9d4a40] Error during QSV decoding.: undefined behavior
(-16)
Error while decoding stream #0:0: Internal bug, should not have happened
...
}}}
I've attached a full log of the ffmpeg output for this error, which
unfortunately doesn't look very helpful.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/9970>
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