[FFmpeg-devel] [PATCH 277/281] ffmpeg: convert to new channel layout-API

[James Almer]

On 1/13/2022 3:29 PM, Michael Niedermayer wrote:
> On Wed, Jan 12, 2022 at 11:09:09PM -0300, James Almer wrote:
>> Signed-off-by: James Almer <jamrial at gmail.com>
>> ---
>>   fftools/cmdutils.c            | 42 +++++++++++++++---------
>>   fftools/cmdutils.h            |  8 -----
>>   fftools/ffmpeg.c              | 47 ++++++++++++++++----------
>>   fftools/ffmpeg.h              |  7 ++--
>>   fftools/ffmpeg_filter.c       | 52 ++++++++++++++++++++++-------
>>   fftools/ffmpeg_opt.c          | 62 ++++++++++++++++++++++++++++++-----
>>   tests/fate/aac.mak            |  2 +-
>>   tests/fate/lavf-container.mak |  2 +-
>>   8 files changed, 155 insertions(+), 67 deletions(-)
> 
> This or a prior patch introduces crashes (it bisected to this but this is my
> 2nd testcase the first did not reproduce reliably at all)
> 
> Thread 1 "ffmpeg_g" received signal SIGSEGV, Segmentation fault.
> 0x00005555566ed811 in av_vlog (avcl=0x5555577400c0, level=24, fmt=0x5555568249e8 "%d frames left in the queue on closing\n", vl=0x7fffffffda50) at libavutil/log.c:428

av_vlog() is where it crashes?

> 428	    if (avc && avc->version >= (50 << 16 | 15 << 8 | 2) &&
> (gdb) bt
> #0  0x00005555566ed811 in av_vlog (avcl=0x5555577400c0, level=24, fmt=0x5555568249e8 "%d frames left in the queue on closing\n", vl=0x7fffffffda50) at libavutil/log.c:428
> #1  0x00005555566ed6bd in av_log (avcl=0x5555577400c0, level=24, fmt=0x5555568249e8 "%d frames left in the queue on closing\n") at libavutil/log.c:411
> #2  0x0000555555c320b9 in ff_af_queue_close (afq=0x5555576c47c8) at libavcodec/audio_frame_queue.c:39
> #3  0x0000555555e84c06 in mp3lame_encode_close (avctx=0x5555576bf180) at libavcodec/libmp3lame.c:86
> #4  0x0000555555c373f7 in avcodec_close (avctx=0x5555576bf180) at libavcodec/avcodec.c:489
> #5  0x0000555555f7feab in avcodec_free_context (pavctx=0x5555576a8858) at libavcodec/options.c:163
> #6  0x000055555569cfe3 in ffmpeg_cleanup (ret=1) at fftools/ffmpeg.c:608
> #7  0x0000555555694817 in exit_program (ret=1) at fftools/cmdutils.c:131
> #8  0x000055555569ef1f in do_audio_out (of=0x5555576ae2c0, ost=0x5555576a8800, frame=0x5555576bf580) at fftools/ffmpeg.c:1056
> #9  0x00005555556a117a in reap_filters (flush=0) at fftools/ffmpeg.c:1546
> #10 0x00005555556ad8e5 in transcode_step () at fftools/ffmpeg.c:4643
> #11 0x00005555556ad9e7 in transcode () at fftools/ffmpeg.c:4687
> #12 0x00005555556ae45c in main (argc=12, argv=0x7fffffffe1c8) at fftools/ffmpeg.c:4903
> (gdb) print avc->version
> Cannot access memory at address 0xc1528eb7c0ea0157
> 
> make -j32 && gdb --args ./ffmpeg_g -ss 8 -i NeroRecodeSample.mp4 -bitexact -t 3 -filter_complex '[0:2]scale=720:576[v];[v][0:5]overlay' -y file-whitesubs.avi
> 
> it appears this file is at:
> https://samples.ffmpeg.org/MPEG-4/NeroRecodeSample-MP4/

I can't reproduce this on mingw64.