Get duration of a video file with Ruby and FFMpeg

gistfile1.rb

def get_movie_duration video_file
	
  # Run ffmpeg on the video, and do it silently
  ffmpeg_output = `/usr/local/bin/ffmpeg -i "#{video_file}" 2>&1`
	
  # Find the duration in the output, and force a return if it's found
  /duration: ([0-9]{2}:[0-9]{2}:[0-9]{2}.[0-9]{2})/i.match(ffmpeg_output) { |m| return m[1] }

  # If it didn't get a match, something is wrong. Log the error
  return "FFMPEG ERROR"

end