If you want to patch ffmpeg to use libdav1d, I have this patch:
https://gist.github.com/WyohKnott/09...190a9855119ba9
To test with mpv, use mpv --vd=libdav1d
Some Rav1e data:
https://wyohknott.github.io/video-fo...son/rav1e.html
Speed is there but the quality is way way below x264 for now.