[nevcairiel]

Originally Posted by SmilingWolf

Based on the line of code highlighted by sneaker_ger I'd say having the number of tile threads implicitly set to 2 makes dav1d bail on this line: https://code.videolan.org/videolan/d.../src/lib.c#L84
The problem, however, is not in LAVFilters, but in FFmpeg's formula for frame distribution between the two modes, starting here: https://github.com/FFmpeg/FFmpeg/blo...ibdav1d.c#L137

LAV Filters was actually meant to avoid the calculation logic in FFmpeg entirely, but since I last looked at it, it was changed again (previously it directly took framethreads = threads). So I've adjusted how LAV configures ffmpeg-dav1d, and it should never use their calculations - and it'll now also disable all threading if you set it to 1.