Video to GIF with colour optimization

video_to_gif.sh

#!/bin/sh

# Arguments:
# First argument: input file
# -ss: start time [optional]
# -t: end time [optional]

# Example usage:
# ./video_to_gif.sh input_file.mov
# ./video_to_gif.sh input_file.mov -ss 1.00
# ./video_to_gif.sh input_file.mov -t 5.00
# ./video_to_gif.sh input_file.mov -ss 1.00 -t 5.00 

# Build a colour palette from video
`ffmpeg $2 $3 -i $1 -filter_complex "[0:v] palettegen" palette.png`
# Generate the gif
`ffmpeg $2 $3 -i $1 -i palette.png -filter_complex "[0:v]fps=10[x];[x]scale=800:-1[y];[y]paletteuse" -f gif output.gif`
# Delete the colour pallete
rm palette.png