0-readme.md

Requirements

~> brew install ffmpeg
~> brew install imagemagick

Usage

~> gifit ~/Desktop/pull-refresh.mov

pull-refresh.gif should now be in ~/Desktop

To change the gif size use the -s param.

~> gifit -s 800 ~/Desktop/pull-refresh.mov

gifit

#!/usr/bin/env bash
# vim: set filetype=sh:

#
# Credit: https://gist.github.com/henriquea/6dac86ed357e036a1dd4
#

set -e

PROGRAM="${0##*/}"

show_help() {
    cat <<_EOF
Usage:

    $PROGRAM <MOV_FILE> [-s SCALE]
_EOF
}

# A POSIX variable
OPTIND=1         # Reset in case getopts has been used previously in the shell.

TEMP_DIR=`mktemp -d -t gifit`
SCALE=400

while getopts "h?s:" opt; do
    case "$opt" in
    h|\?)
        show_help
        exit 0
        ;;
    s)  SCALE=$OPTARG
        ;;
    esac
done

shift $((OPTIND-1))

[ "$1" = "--" ] && shift

ffmpeg -i "$1" -vf scale=$SCALE:-1 -r 10 $TEMP_DIR/gif%3d.png

FILENAME=${1##*/}
DIR=`dirname $1`

convert \
  -delay 8 \
  -dither none \
  -coalesce \
  -layers optimize \
  -depth 8 \
  -colors 128 \
  -loop 0 \
  $TEMP_DIR/gif*.png \
  "$DIR/${FILENAME%.*}.gif"

rm -rf $TEMP_DIR