Simple flac2mp3 conversion script, supporting essential tags and batch processing with globs.

flac2mp3

#!/usr/bin/ruby
# http://gist.github.com/230533
# forked from http://gist.github.com/124242

# TODO: add iteration over arguments
filename=ARGV[0]
abort "Usage: flac2mp3 FLACFILE" if filename.nil?

`metaflac --export-tags-to=- "#{filename}"`.each_line do |s|
  v=s.strip.split '=', 2
  v[0].upcase!
  v[1].gsub! '"', '\"'
  eval %Q[#{v[0]}="#{v[1]}"];
end

# TODO: this may explode if any of these values are not defined by the metaflac lines above
args=%Q[--tt "#{TITLE}" --ta "#{ARTIST}" --tl "#{ALBUM}" --tn "#{TRACKNUMBER}" --tg "#{GENRE}" --ty "#{DATE}" --add-id3v2]
basename=File.basename(filename, File.extname(filename))

puts "Encoding #{basename}.mp3"
exec %Q[flac -sdc "#{filename}" | lame --alt-preset standard #{args} - "#{basename}.mp3"]