AOMedia > AV1 > AVIF
% ffmpeg -r 1 -i INFILE -c:v libaom-av1 -g 1 -frames 1 -crf CRFVALUE -b:v 0 -an -strict experimental -y OUTFILE.mp4 % mp4box -add-image OUTFILE.mp4:time=0 -brand avif OUTFILE.avif
% ffmpeg -r 1 -i INFILE -c:v libaom-av1 -g 1 -frames 1 -crf CRFVALUE -b:v 0 -an -strict experimental -y OUTFILE.mp4
% mp4box -add-image OUTFILE.mp4:time=0 -brand avif OUTFILE.avif