This is my little script to convert (screengrabbed-) movs to gifs to paste them into docs. This is just a tiny wrapper around ffmpeg and gifsicle. Obviously ffmpeg and gifsicle need to installed. I use ffmpeg version 6.6.1 and gifsicle in version 1.94

convertMovToGif.sh

#!/bin/sh

while getopts f: flag
do
    case "${flag}" in
        f) inputFilename=${OPTARG};;
    esac
done

ffmpeg -i $inputFilename.mov -pix_fmt rgb8 -r 10 $inputFilename.gif && gifsicle -O3 $inputFilename.gif -o $inputFilename.gif

Very nice!