ID3, MP4 and OGG/FLAC metadata parsing in Go
Go to file
2018-04-02 08:17:25 +10:00
cmd tools: move to cmd subdir 2018-04-02 08:14:54 +10:00
internal/id3v1_test Move ID3v1 test data under internal directory 2016-07-17 08:16:53 +10:00
mbz Simplify MusicBrainz Info type and support more tags. 2015-06-08 11:01:32 +10:00
.editorconfig Add a basic editorconfig file 2015-05-01 22:44:59 +10:00
.travis.yml Added .travis.yml 2015-03-20 09:02:27 +11:00
flac.go fix const declarations 2018-04-02 08:17:25 +10:00
id3v1_test.go Move ID3v1 test data under internal directory 2016-07-17 08:16:53 +10:00
id3v1.go Fix: metadataID3v1 did not set the value for "comment" key unless the tag is ID3v1.1. 2016-07-17 08:16:53 +10:00
id3v2_test.go Support for numeric genres in id3v2 2015-07-04 14:20:43 +02:00
id3v2.go id3v2: fix variable name and pre-compute genre regexp 2018-04-02 08:17:10 +10:00
id3v2frames.go id3v2: tidy up dataSplit and decodeText 2018-04-02 08:16:46 +10:00
id3v2metadata_test.go Initial commit 2015-03-19 23:21:53 +11:00
id3v2metadata.go Fix parsing of year in ID3v2.4 2017-09-14 08:43:05 +10:00
id.go Distinguish between M4{A,B,P} formats. 2016-02-22 21:01:12 +11:00
LICENSE Initial commit 2015-03-19 23:21:53 +11:00
mp4.go mp4: fix panic on invalid encoding 2018-02-17 13:07:03 +11:00
ogg.go fix const declarations 2018-04-02 08:17:25 +10:00
README.md Update README.md 2017-08-01 22:29:01 +10:00
sum.go Read and skip extended header bytes for 2.3 and 2.4 2016-05-05 17:18:51 +02:00
tag.go Fix Format and FileType enumerations, and incorrect Format() for OGG. 2017-09-14 08:55:56 +10:00
util_test.go Add some basic tests for utils 2015-05-03 09:59:03 +10:00
util.go Implemented basic FLAC support (no artwork, yet!) 2015-04-15 00:12:37 +10:00
vorbis.go vorbis: fix panic on invalid encoding 2018-02-07 18:37:07 +11:00

MP3/MP4/OGG/FLAC metadata parsing library

Build Status GoDoc

This package provides MP3 (ID3v1,2.{2,3,4}) and MP4 (ACC, M4A, ALAC), OGG and FLAC metadata detection, parsing and artwork extraction.

Detect and parse tag metadata from an io.ReadSeeker (i.e. an *os.File):

m, err := tag.ReadFrom(f)
if err != nil {
	log.Fatal(err)
}
log.Print(m.Format()) // The detected format.
log.Print(m.Title())  // The title of the track (see Metadata interface for more details).

Parsed metadata is exported via a single interface (giving a consistent API for all supported metadata formats).

// Metadata is an interface which is used to describe metadata retrieved by this package.
type Metadata interface {
	Format() Format
	FileType() FileType

	Title() string
	Album() string
	Artist() string
	AlbumArtist() string
	Composer() string
	Genre() string
	Year() int

	Track() (int, int) // Number, Total
	Disc() (int, int) // Number, Total

	Picture() *Picture // Artwork
	Lyrics() string

	Raw() map[string]interface{} // NB: raw tag names are not consistent across formats.
}

Audio Data Checksum (SHA1)

This package also provides a metadata-invariant checksum for audio files: only the audio data is used to construct the checksum.

http://godoc.org/github.com/dhowden/tag#Sum

Tools

There are simple command-line tools which demonstrate basic tag extraction and summing:

$ go get github.com/dhowden/tag/...
$ cd $GOPATH/bin
$ ./tag 11\ High\ Hopes.m4a
Metadata Format: MP4
Title: High Hopes
Album: The Division Bell
Artist: Pink Floyd
Composer: Abbey Road Recording Studios/David Gilmour/Polly Samson
Year: 1994
Track: 11 of 11
Disc: 1 of 1
Picture: Picture{Ext: jpeg, MIMEType: image/jpeg, Type: , Description: , Data.Size: 606109}

$ ./sum 11\ High\ Hopes.m4a
2ae208c5f00a1f21f5fac9b7f6e0b8e52c06da29