mp3のタグを書き換えるスクリプト ruby 1.9.2

sc.rb

require 'mp3info'

dir = '/my/music/library/'

Dir::glob(dir + '*.mp3').each {|f|
  Mp3Info.open(f) do |mp3|
    t = mp3.tag.title
    title = t.slice(t.rindex('/') + 2, t.length)
    artist = t.slice(0, t.rindex('/') - 1)
    if title.index(' - ')
      title = title.slice(0, title.index(' - '))
    end

    puts "#{artist} // #{title}"

    title = title.encode('us-ascii', 'utf-8')
    artist = artist.encode('us-ascii', 'utf-8')
    aartist = "Various Artists".encode('us-ascii', 'utf-8')

    mp3.tag.title = title
    mp3.tag.artist = artist
    mp3.tag2.TP2 = aartist
  end
}