ID3, MP4 and OGG/FLAC metadata parsing in Go
be3da62488
1) correct a bug with the mdat atom. Sometimes, the metadata can be at the end, after the audio Demo : get any music file and strip the metadata convert it to m4a with ffmpeg analyse it with MusicBrainz Picard et voila, you have the metadata at the end. Example of structure of a m4a created that way; https://www.dropbox.com/s/602yivdstan7506/atom.txt?dl=0 2) add support for the "----" tag See http://atomicparsley.sourceforge.net/mpeg-4files.html It gives access to the tags created by MusicBrainz Picard |
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|---|---|---|
| check | ||
| sum | ||
| tag | ||
| .editorconfig | ||
| .travis.yml | ||
| flac.go | ||
| id3v1.go | ||
| id3v2_test.go | ||
| id3v2.go | ||
| id3v2frames.go | ||
| id3v2metadata_test.go | ||
| id3v2metadata.go | ||
| LICENSE | ||
| mp4.go | ||
| ogg.go | ||
| README.md | ||
| sum.go | ||
| tag.go | ||
| util_test.go | ||
| util.go | ||
| vorbis.go | ||
MP3/MP4/OGG/FLAC metadata parsing library
This package provides MP3 (ID3v1,2.{2,3,4}) and MP4 (ACC, M4A, ALAC), OGG and FLAC metadata detection, parsing and artwork extraction.
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
Example Usage
There are a 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