Extract animated gif from mp4 video

gifcut.rb

input_file,
output_file,
start_time,
duration, 
fps,
scale = *ARGV

options = "-ao null -nosound -vo gif89a:fps=#{fps}:output=#{output_file} -ss #{start_time} -endpos #{duration} -vf scale=#{scale}"
player_path = "/Applications/MPlayer OSX Extended.app/Contents/Resources/Binaries/mpextended.mpBinaries/Contents/mpextended.mpBinaries/Contents/MacOS/mplayer"

`'#{player_path}' #{input_file} #{options}`