HandBrakeCLIを使って、DVDをチャプターごとにmp4に変換するスクリプトです。gem handbrakeおよびHandBrakeCLIが必要です。

dvd2mp4.rb

#!/usr/bin/ruby
require 'rubygems'
require 'handbrake'

VOLUME = '/Volumes/Untitled UDF Volume/'
DIST_DIR = '.'
PREFIX = 'antonio-'
HAND_BRAKE_CLI = '/usr/local/Cellar/handbrake/1.1.1/bin/HandBrakeCLI'

hb = HandBrake::CLI.new(:bin_path => HAND_BRAKE_CLI, :trace => false)

project = hb.input(VOLUME)

disc = project.scan

title = disc.titles[1]
size = title.chapters.size
(1..size).each do |i|
  chap = title.chapters[i]
  unless chap.nil?
    puts 'start chapter-' + chap.number.to_s
    project.title(1).preset('High Profile').chapter(chap.number.to_s + '-' + chap.number.to_s).output(DIST_DIR + '/' + PREFIX + chap.number.to_s + '.mp4')
  end
end