https://github.com/dhowden/tag

ID3, MP4 and OGG/FLAC metadata parsing in Go
https://github.com/dhowden/tag

audio-data checksum flac go id3 id3v1 id3v2 mp3 mp4 ogg parsing

Last synced: 2 months ago
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ID3, MP4 and OGG/FLAC metadata parsing in Go

• Host: GitHub
• URL: https://github.com/dhowden/tag
• Owner: dhowden
• License: bsd-2-clause
• Created: 2015-03-19T12:22:52.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2024-05-05T09:57:13.000Z (5 months ago)
• Last Synced: 2024-06-28T01:48:24.946Z (3 months ago)
• Topics: audio-data, checksum, flac, go, id3, id3v1, id3v2, mp3, mp4, ogg, parsing
• Language: Go
• Homepage:
• Size: 1.48 MB
• Stars: 545
• Watchers: 16
• Forks: 72
• Open Issues: 25
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# MP3/MP4/OGG/FLAC metadata parsing library

[![GoDoc](https://pkg.go.dev/badge/github.com/dhowden/tag)](https://pkg.go.dev/github.com/dhowden/tag)

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`):

```go

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).

```go

// 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

	Comment() 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.

[https://pkg.go.dev/github.com/dhowden/tag#Sum](https://pkg.go.dev/github.com/dhowden/tag#Sum)

## Tools

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

```console

$ go install github.com/dhowden/tag/cmd/tag@latest

$ 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

```