movをgifに変換するやつ https://github.com/dergachev/screengif ぽいやつ

mov2gif

#!/bin/bash

function func_mov2gif {
  local outname
  for inname in "${@}"; do
    if [ -f "${inname}" ]; then
      outname="$(dirname "${inname}")/$(basename -s ".mov" "${inname}").gif"
      ffmpeg -i "${inname}" -r 10 -f gif - | gifsicle --threads --optimize --output "${outname}"
    fi
  done
}

func_mov2gif "${@}"