function() vid2gif {
    local src="$1"
    local dst="$2"

    local fps="25" # gif internal = delay in 1/100th s => fps in [100, 50, 33.3, 25, 20, ...]
    local width="320" # height automatic
    local loop="0" # -loop $loop : 0 = infinite, -1 = nope, > 0 = play twice or more (play=loop+1)
    local skip="0" # -ss $skip
    local length="-1" # -t $length

    # palettegen=stats_mode=single (each frame) | =full (default, whole image) | =diff (moving parts)
    # paletteuse=new=1 (one palette per frame)
    # paletteuse=dither=bayer bayer_scale=[0,5] (default 2)
    # https://ffmpeg.org/ffmpeg-filters.html#palettegen
    # https://ffmpeg.org/ffmpeg-filters.html#paletteuse

    ffmpeg -i "${src}" -vf "fps=25,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 "${dst}"
}

# vim: ft=bash