max_colorsを使おう
ffmpeg -i piyo.mov -vf "fps=8,scale=480:-1:flags=lanczos,split[s0][s1];[s0]palettegen=max_colors=4:reserve_transparent=0[p];[s1][p]paletteuse" -loop 0 piyo.gif
max_colorsを使おう
ffmpeg -i piyo.mov -vf "fps=8,scale=480:-1:flags=lanczos,split[s0][s1];[s0]palettegen=max_colors=4:reserve_transparent=0[p];[s1][p]paletteuse" -loop 0 piyo.gif