# gif2avif <GIF>
# convert gif to avif image
function gif2avif
    set base (string replace -r '\.gif$' '' -- $argv[1])
    ffmpeg -i "$argv[1]" -pix_fmt yuv444p10 -strict -1 "$base.y4m"
    avifenc "$base.y4m" "$base.avif"
    rm -v "$base.y4m"
end