Ruby mp3 Id3 parsing

Question

Hello folks,

Currently im working on some sort of music project, so dealing with user mp3 uploads. And the problem is that i cant find id3 library, that will work correctly for all files. I have tried libs: id3-ruby, Mp3Info, but still none of them gives me correct results. For example, most common problems:

• wrong stream parameters (bitrate and sample rate, sometimes duration)
• not supported extended tags

So, i decided to add form, so users have to fill optional information like Artist and title, that helped a little, but didnt solve the problem.

Does anyone knows most usable and powerful library for ruby that will work with ID3 correctly?

Answer 1

http://www.hakubi.us/ruby-taglib/

I used this for a project and it worked quite well. Wrapper around taglib, which is very portable.

Answer 2

http://id3lib-ruby.rubyforge.org/

I particularly liked this one, you can also write tags to the file.

Answer 3

I've used this:

http://ruby-mp3info.rubyforge.org/

or

gem install ruby-mp3info (add the regulation sudo for Mac or *nix)

There's some rdoc documentation, which is nice. On the downside, I don't much like the use of upper-case field names, which seems too concerned to preserve the names from the spec. Maybe I should hack in some aliases. Anyway, this sample script scans my music library and counts words in titles:

require 'mp3info'

count = 0
words = Hash.new { |h, k| h[k] = 0 }
Dir.glob("E:/MUSIC/**/*.mp3") do |f|
  count += 1
  Mp3Info.open(f) do |mp3info|
    title = mp3info.tag2.TIT2
    next unless title
    title.split(/\s/).each { |w| words[w.downcase] += 1 }
  end
end
puts "Examined #{count} files"
words.to_a.sort{ |a, b| b[1] <=> a[1] }[0,100].each { |w| puts "#{w[0]}: #{w[1]}" }