ipod-shuffle-build-library.rb

#!/usr/bin/env ruby

Dir.chdir(File.dirname(__FILE__))

# IPod-Shuffle-4g ignores aiff files and besides, they are really, really big.
# (The originals are about 10 times bigger than the output mp3 after the conversion.)
# 57M vs. 5,2M
Dir.glob('**/*.aiff').each do |path|
  command = "ffmpeg -i '#{path}' '#{path.sub('.aiff', '.mp3')}' && rm '#{path}'"
  puts "~ #{command}"; system(command)
end

# The --rename-unicode option of ipod-shuffle-4g.py doesn't work.
OK_FOLDERS = ['1 Lifeflow']

Dir.glob('**/*.mp3').each do |path|
  next if OK_FOLDERS.include?(File.dirname(path))
  random    = Array.new(8) { rand(256) }.pack('C*').unpack('H*').first
  extension = path.split('.').last.downcase
  new_path  = [File.dirname(path), "#{random}.#{extension}"].join('/')

  unless path.match(/\/[\w\d]{16}\.mp3$/)
    puts "~ Renaming '#{path}' to '#{new_path}'."
    File.rename(path, new_path)
  end
end

options = %w{--track-gain 33 --auto-dir-playlists --verbose}
system("IPod-Shuffle-4g/ipod-shuffle-4g.py --track-voiceover --rename-unicode #{options.join(' ')} .")