ruby-vorbis_comment is a Ruby library for manipulating Vorbis comments. It wraps libvorbis and libogg, so it should be completely standards compatible. Vorbis comment is the standard tagging format for Ogg Vorbis, FLAC, and Speex files.

This library tries to be API compatible with ruby-apetag, a library for reading and writing APE tags, the standard tagging format for Musepack and Monkey’s Audio, which can also be used with MP3s as an alternative to ID3v2.

 require 'vorbis_comment'

 vc = VorbisComment.new('file.ogg')

 # Whether file already has an vorbis comment
 vc.exists?

 # A CICPHash of fields, keys are strings, values are lists of strings
 vc.fields

 # String suitable for pretty printing
 vc.pretty_print

# Update the tag with the added/changed/deleted fields
 vc.update{|fields| fields['Artist']='Test Artist'; fields.delete('Year')}

 # Clear the list of vorbis comments from the file
 vc.remove!

To build the library, run rake build. To run the tests for the library after building, run rake.

If you find any bugs, would like additional documentation, or want to submit a patch, please use GitHub (github.com/jeremyevans/ruby-vorbis_comment/issues). One known bug is that it doesn’t like files less than 8K in size.

The RDoc for the project is available on ruby-vorbiscomment.jeremyevans.net

The most current source code can be accessed via github (github.com/jeremyevans/ruby-vorbis_comment/). Note that the library isn’t modified on a regular basis, so it is unlikely to be different from the latest release.

If called from the command line, ‘vorbis_comment.rb` prints out the contents of the Vorbis comments for the given filename arguments.