Simple script to convert videos to gifs

cnv2gif

#!/bin/bash
# cnv2gif
# Credit for ffmpeg commands to
# http://superuser.com/a/556031

if [ "$#" -eq 5 ]; then
    ffmpeg -y -ss $2 -t $3 -i "$1" -vf fps=$4,scale=320:-1:flags=lanczos,palettegen palette.png
    ffmpeg -ss $2 -t $3 -i "$1" -i palette.png -filter_complex \
        "fps=$4,scale=320:-1:flags=lanczos[x];[x][1:v]paletteuse" "$5.gif"
    rm palette.png
else
    echo "Usage: cnv2gif <infile> <delay> <length> <fps> <outfile>.gif"
    echo "delay is a start delay in integer seconds"
    echo "length is length in integer seconds"
    echo "fps is frames per second"
    echo "e.g. cnv2gif hubble.mp4 1 20 10 hubble"
fi