convert a movie file to a gif

giffy.sh

#!/bin/bash
# assumes you have ffmpeg - brew install ffmpeg
if [ -z "$1" ]; then
    echo "No input file"
    exit
fi
if [ -z "$2" ]; then
    echo "No output file"
    exit
fi
RATE=$3
if [ -z "$3" ]; then
    echo "No Framerate, using 10fps"
    RATE=10
fi
ffmpeg -ss 00:00:00.000 -i $1 -pix_fmt rgb24 -r $RATE $2
# Limit the length: 
# ffmpeg -ss 00:00:00.000 -i $1 -pix_fmt rgb24 -r 10  -t 00:00:10.000 $2