OggVorbisParser

A parser for VorbisComments in Ogg containers.

Installation

The package can be installed by adding ogg_vorbis_parser to your list of dependencies in mix.exs:

def deps do
  [
    {:ogg_vorbis_parser, "~> 2.0.0"}
  ]
end

This parser only loads 4000 byte chunks into memory by default (xiph.org's recommended max for streaming). You can pass in more bytes if you need to though.

Note that the "format" comment in the example below says MP3 because this Ogg file from archive.org was probably converted from an mp3. The actual mp3 is included too as shown below.

Examples

iex> {:ok, binary} = OggVorbisParser.parse("test/audio_files/lifeandtimesoffrederickdouglass_01_douglass.ogg")
iex> binary
%{
  "comments" => %{
    "album" => "Life and Times of Frederick Douglass",
    "artist" => "Frederick Douglass",
    "comment" =>
      "http://archive.org/details/life_times_frederick_douglass_ls_1411_librivox",
    "crc32" => "965da915",
    "encoder" => "Lavf55.45.100",
    "format" => "128Kbps MP3",
    "genre" => "speech",
    "height" => "0",
    "length" => "351.76",
    "md5" => "4be053d1a643c55f155bc489e687f9c8",
    "mtime" => "1415249910",
    "sha1" => "f85622a5998dde20e935fbcee782fcb39bbcdaa6",
    "size" => "5632957",
    "source" => "original",
    "title" => "01 - Author's Birth",
    "tracknumber" => "2",
    "vendor_string" => "Lavf55.45.100",
    "width" => "0"
  },
  "vendor_string" => "Lavf55.45.100"
}

iex> {:ok, binary} = OggVorbisParser.parse("test/audio_files/lifeandtimesoffrederickdouglass_01_douglass.ogg")
iex> binary["comments"]["title"]
"01 - Author's Birth"

iex> {:error, err} = OggVorbisParser.parse("test/audio_files/lifeandtimesoffrederickdouglass_01_douglass_128kb.mp3")
iex> err
:no_ogg_container_found