ruby-mp3info

• github.com/moumar/ruby-mp3info

DESCRIPTION:

ruby-mp3info read low-level informations and manipulate tags on mp3 files.

FEATURES/PROBLEMS:

• written in pure ruby

• read low-level informations like bitrate, length, samplerate, etc…

• read, write, remove id3v1 and id3v2 tags

• correctly read VBR files (with or without Xing header)

• only 2.3 version is supported for writings id3v2 tags

• id3v2 tags are always written in UTF-16 encoding

SYNOPSIS:

### read and display infos & tags

require "mp3info"
# read and display infos & tags
Mp3Info.open("myfile.mp3") do |mp3info|
  puts mp3info
end

# read/write tag1 and tag2 with Mp3Info#tag attribute
# when reading tag2 have priority over tag1
# when writing, each tag is written.
Mp3Info.open("myfile.mp3") do |mp3|
  puts mp3.tag.title   
  puts mp3.tag.artist   
  puts mp3.tag.album
  puts mp3.tag.tracknum
  mp3.tag.title = "track title"
  mp3.tag.artist = "artist name"
end

# tags are written when calling Mp3Info#close or at the end of the #open block

### access id3v2 tags

Mp3Info.open("myfile.mp3") do |mp3|
  # you can access four letter v2 tags like this
  puts mp3.tag2.TIT2
  mp3.tag2.TIT2 = "new TIT2"
  # or like that
  mp3.tag2["TIT2"]
  # at this time, only COMM tag is processed after reading and before writing
  # according to ID3v2#options hash
  mp3.tag2.options[:lang] = "FRE"
  mp3.tag2.COMM = "my comment in french, correctly handled when reading and writing"
end

REQUIREMENTS:

• iconv

INSTALL:

• gem install ruby-mp3info

DEVELOPERS:

After checking out the source, run:

$ rake newb

This task will install any missing dependencies, run the tests/specs, and generate the RDoc.

LICENSE:

ruby

TODO:

• encoder detection

• support for more tags in id3v2

• generalize id3v2 with other audio formats (APE, MPC, OGG, etc…)