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taglib.cr

Some spicy read-only (for now?) bindings to the C++ TagLib library. There be dragons.

Tested only on 64-bit architectures (amd64, aarch64).

Installation

  1. Install taglib on your system
  2. Add the dependency to your shard.yml:
dependencies:
  taglib:
    github: nilsding/taglib.cr
  1. Run shards install

Usage

require "taglib"

fileref = TagLib::FileRef.new("Hubba Hubba Zoot Zoot.ogg")

# Get basic tag info
tags = fileref.tag.not_nil!
puts tags.artist  # => Caramba
puts tags.album   # => Så svenskt!
puts tags.year    # => 2002

# Get additional tags
properties = fileref.file.not_nil!.properties
pp properties  # => {"ALBUM" => ["Så svenskt!"],
               #     "ARTIST" => ["Caramba"],
               #     "DATE" => ["2002-06-18"],
               #     "TITLE" => ["Hubba Hubba Zoot Zoot"],
               #     "TRACKNUMBER" => ["2"],
               #     "TRACKTOTAL" => ["20"]}

# Get the audio properties of the given file
audio_properties = fileref.audio_properties.not_nil!
puts audio_properties.sample_rate        # => 44100
puts audio_properties.length_in_seconds  # => 117

# Extract all pictures from a FLAC file
fileref = TagLib::FileRef.new("SomeFile.flac")
if fileref.file.is_a?(TagLib::FLAC::File)
  file = fileref.file.not_nil!.as(TagLib::FLAC::File)
  file.pictures.each_with_index do |pic, i|
    file_name = "#{i + 1}_#{pic.type}." + pic.mime_type.split("/").last
    puts "Saving picture ##{i + 1} as #{file_name}"

    File.open(file_name, "wb") do |f|
      f.write pic.data
    end
  end
end
# => Saving picture #1 as 1_FrontCover.png
# => Saving picture #2 as 2_ColouredFish.png
# => Saving picture #3 as 3_LeadArtist.jpeg

Development

TODO: Write development instructions here

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request

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Some spicy read-only (for now?) Crystal bindings to the C++ TagLib library. There be dragons.

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