[FFmpeg-trac] #11066(undetermined:new): Aborted (core dumped) when converting from h265 to av1 with opus (4.4.2-0ubuntu0.22.04.1)

[FFmpeg]

#11066: Aborted (core dumped) when converting from h265 to av1 with opus
(4.4.2-0ubuntu0.22.04.1)
-------------------------------------+-------------------------------------
             Reporter:  s12          |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  crash        |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 I get a seg fault when trying to do 2 pass encoding to av1 with opus in an
 mp4 container.

 How to reproduce:

 I took a quick obs screen recording of the "Bug Reports" page. I then ran
 `ffmpeg -i 2024-06-21\ 10-40-46.mkv -c:v libx265 ~/Videos/Bug\ Test.mp4`
 to get my test input file. I then did the following to recreate my issue
 (after changing directory):

 {{{
 % ffmpeg -i "Bug Test.mp4" -ss 00:00:03 -to 00:00:17 -c:v libaom-av1 -b:v
 130576 -c:a libopus -b:a 40K -r 12 -g 4096 -cpu-used 5 -pass 1 -f null
 /dev/null && ffmpeg -i "Bug Test.mp4" -ss 00:00:03 -to 00:00:17 -c:v
 libaom-av1 -b:v 130576 -c:a libopus -b:a 40K -r 12 -g 4096 -cpu-used 5
 -pass 2 "Bug Test out.mp4"
 ffmpeg version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2000-2021 the FFmpeg
 developers
   built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
 }}}


 I got

 {{{
 ffmpeg: ./av1/encoder/temporal_filter.c:973: tf_setup_filtering_buffer:
 Assertion `to_filter_buf != NULL' failed.
 Aborted (core dumped)
 }}}
 In the output.

 Initially, I had tried to simply do `ffmpeg -i 2024-06-21\ 09-30-17.mkv
 -c:v libx265 -an ~/Bug\ Test.mp4` then in home; `ffmpeg -i "Bug Test.mp4"
 -ss 00:00:03 -to 00:00:17 -c:v libaom-av1 -b:v 130576 -cpu-used 5 -pass 1
 -f null /dev/null && ffmpeg -i "Bug Test.mp4" -ss 00:00:03 -to 00:00:17
 -c:v libaom-av1 -b:v 130576 -cpu-used 5 -pass 2 "Bug Test out.mp4"` to try
 to recreate the bug, however this seemed to work just fine. Hence, I used
 audio and more options from my initial use case to recreate the issue.

 This is probably my first foss bug report, so apologies for not being able
 to follow the guide perfectly. I haven't used gdb before, and I couldn't
 find any resources on what `ffmpeg_g` is. I tried using gdb anyway, and
 got

 {{{
 ffmpeg: ./av1/encoder/temporal_filter.c:973: tf_setup_filtering_buffer:
 Assertion `to_filter_buf != NULL' failed.

 Thread 1 "ffmpeg" received signal SIGABRT, Aborted.
 __pthread_kill_implementation (no_tid=0, signo=6,
 threadid=140737088590656) at ./nptl/pthread_kill.c:44
 44      ./nptl/pthread_kill.c: No such file or directory.
 (gdb)
 }}}

 I'll try to include my files with better names in case they help.

 Please do let me know if/when fixed versions are available, and what
 workarounds may exist in the mean time. Many thanks.

 I hope this helps!
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11066>
FFmpeg <https://ffmpeg.org>
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