go-mp4tag

MP4 tagger written in Go.

Setup

go get github.com/Sorrow446/go-mp4tag

import "github.com/Sorrow446/go-mp4tag"

Usage Examples

	tags := &mp4tag.Tags{
		Album: "album",
		AlbumArtist: "album artist",
		Title:       "title",
		TrackNumber: 1,
		TrackTotal:  20,
		Genre: "genre",
		DiskNumber:  3,
		DiskTotal:   10,
		Comment:     "comment",
	}
	err := mp4tag.Write("1.m4a", tags)
	if err != nil {
		panic(err)
	}

Write album, album artist, title, track number, track total, genre, disk number, disk total, and comment tags.

   tags := &mp4tag.Tags{
   	Custom: map[string]string{
   		"CUSTOMFIELD": "custom field",
   		"CUSTOMFIELD2": "custom field 2",
   	},
   	Delete: []string{"genre", "cover"},
   }
   err := mp4tag.Write("1.m4a", tags)
   if err != nil {
   	panic(err)
   }

Write two custom fields named CUSTOMFIELD and CUSTOMFIELD2, delete genre tag, and remove cover.

	coverBytes, err := ioutil.ReadFile("cover.jpg")
	if err != nil {
		panic(err)
	}
	tags := &mp4tag.Tags{
		Cover: coverBytes,
	}
	err = mp4tag.Write("1.m4a", tags)
	if err != nil {
		panic(err)
	}

Write cover from cover.jpg.

Misc

type Tags struct {
	Album       string
	AlbumArtist string
	Artist      string
	Comment     string
	Composer    string
	Cover       []byte
	Custom      map[string]string
	Delete      []string
	DiskNumber  int
	DiskTotal   int
	Genre       string
	Label       string
	Title       string
	TrackNumber int
	TrackTotal  int
	Year        string
}

iTunes-style metadata only.
Delete strings: album, albumartist, artist, comment, composer, cover, disk, genre, label, title, track, year.
Custom tag deletion is not implemented yet.

Thank you

go-mp4tag relies heavily on abema's go-mp4 library.

Disclaimer

Although go-mp4tag has been thoroughly tested, I will not be responsible for the very tiny chance of any corruption to your MP4 files.