Shell script to create a gif out of a video using ffmpeg

creategif.sh

#!/bin/bash
#----------------------------------------------------
#  Author : athakur
#  Version : 1.0
#  Create Date : 27/02/2018
#  Update Date : 27/02/2018
#  Description : Create gif from a video
#	Sample usage : ./creategif.sh input.mp4 output.gif
# ffmpeg static build can be downloaded from https://johnvansickle.com/ffmpeg/
#----------------------------------------------------
echo "Converting $1 to $2"

if [ -z "$1" ] || [ -z "$2" ]
  then
  echo "Incorrect arguments supplied. Format - ./creategif.sh input.mp4 output.gif"
  exit
fi

palette="/tmp/palette.png"

filters="fps=10,scale=1024:-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"

echo "Completed gif creation"