video to gif using ffmpeg with superior quality

gif.sh

#!/bin/sh

# run docker version instead of local installation
alias ffmpeg='docker run -v=`pwd`:/tmp/ffmpeg opencoconut/ffmpeg'
palette="palette.png"


# adjust fps here if you need to
filters="fps=10,scale=$1:-1:flags=lanczos"

# create a palette with the colors beforehand for superior results
ffmpeg -v warning -i $2 -vf "$filters,palettegen" -y $palette

# convert video to gif using the palette
ffmpeg -v warning -i $2 -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $3

# remove the palette
rm palette.png

./gif.sh 480 example.mov example.gif