Generates gif palettes dynamically to increase quality. Nicked (and modified a bit) from http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html

palettemagic.sh

# !/bin/sh

# original script from http://blog.pkh.me/p/21-high-quality-gif-with-ffmpeg.html

palette="/tmp/palette.png"

# the scale here refers to the horizontal size which then gets used to scale the output
# variables:
# fps: Frames Per Second
# scale: horizontal width in pixels
filters="fps=30,scale=728:-1:flags=lanczos"

ffmpeg -v warning -i $1 -vf "$filters,palettegen" -y $palette
ffmpeg -v warning -i $1 -i $palette -lavfi "$filters [x]; [x][1:v] paletteuse" -y $2

# Usage: ./palettemagic.sh inputvideo.extension outputfile.gif
# Example: ./palettemagic.sh final.mp4 output.gif