ruby-mp3info
by Guillaume Pierronnet
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
- only 2.3 version is supported for writings id3v2 tags
SYNOPSIS:
a good exercise is to read the test.rb to understand how the library works deeper
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
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
# tags v2 will be read and written according to the :encoding settings
mp3 = Mp3Info.open("myfile.mp3", :encoding => 'utf-8')
REQUIREMENTS:
- iconv
INSTALL:
$ ruby install.rb config $ ruby install.rb setup # ruby install.rb install
or
# gem install ruby-mp3info
LICENSE:
ruby
TODO:
- encoder detection
- support for more tags in id3v2
- generalize id3v2 with other audio formats (APE, MPC, OGG, etc…)