segfault when invoking libaom realtime mode and cpu-used 8

[veikk0]

Summary of the bug:

FFmpeg exits with a segfault when attempting to run libaom in realtime mode (-usage realtime) and -cpu-used 8.

The command runs for a moment before exiting with a segmentation fault.

How to reproduce:

ffmpeg -i input.mp4 -an -c:v libaom-av1 -b:v 0 -crf 40 -cpu-used 8 -usage realtime rt.mp4

Version and build info:

ffmpeg version N-102971-g13ec6624b3
built with gcc 9 (Ubuntu 9.3.0-17ubuntu1~20.04)

libaom was built from git

[James]

I can reproduce the crash, but the backtrace points to an internal libaom function, so you should report this problem to that project instead.

[veikk0]

The bug is being tracked here: ​https://bugs.chromium.org/p/aomedia/issues/detail?id=3111