FYI: upstream has fixed the upstream bug https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/25000 and the fix has been backported to branch release/9.0 with PR (merged) https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25016
I apply commit https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25016/commits to Debian ffmpeg 9.0.2-3 and it seems to fix my problem. Cheers, Roderich
