Batch convert flac to mp3, with metadata, using ffmpeg

flac-to-mp3.rb

Dir.glob("*.flac").each do |f|
  flac = "./#{f.gsub(' ', '\ ')}"
  mp3 = "./#{f.gsub(' ', '\ ').chomp('.flac')}.mp3"
  system("ffmpeg -i #{flac} -map_meta_data #{mp3}:#{flac} #{mp3}")
end

mp3-to-wav.rb

Dir["*.mp3"].each do |file| 
  puts "\rConverting #{file}..."
  file = file.chomp(".mp3")
  `ffmpeg -i '#{file}.mp3' '#{file}.wav'`
end