Quick video to GIF converter

mkgif.sh

#!/bin/bash
me=`basename "$0"`

## i.e. mkgif Untitled.mov 640x360 20 2d.gif -vf "hflip,vflip"

usage="Usage: $me INFILE WxH FPS OUTFILE ffmpeg_opts.."

if [ -z "$1" ]
 then
  echo "No input file supplied."
  echo $usage
  exit 1
fi

if [ -z "$2" ]
 then
  echo "No resolution supplied."
  echo $usage
  exit 1
fi
if [ -z "$3" ]
 then
  echo "No FPS supplied."
  echo $usage
  exit 1
fi


if [ -z "$4" ]
 then
  echo "No output file supplied."
  echo $usage
  exit 1
fi


echo FPS: "$3"

ftime=`expr 95 / "$3"`

echo FTime: $ftime

ffmpeg -i "$1" -s "$2" -pix_fmt rgb24 -r "$3" -f gif "${@:5}" - | gifsicle --optimize=3 --delay=$ftime > "$4"