MusicBrainz Tag: Difference between revisions
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#REDIRECT [[MusicBrainz Picard]] |
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=MusicBrainz Metadata Tags (ID3 and Vorbis/FLAC Comment)= |
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'''Status:''' ''The information on this page is complete as of tunepimp [[Subversion]] snapshot 2006-01-13, and has been partially updated on 2009-12-14.'' |
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Applications that read or write metadata tags from music files should follow one consistent specification for what [[MusicBrainz]] information is stored where and in what tag. That way all the work of the various tagger applications will contribute to a well connected and clean body of metadata. Any application that deals with music should be able to read the [[MusicBrainz Identifier|MusicBrainzIdentifier]]<code><nowiki></nowiki></code>s from a music file in order to communicate unambiguously about the music it's working with. |
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==ID3v2 Tag specifications== |
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See [[ID3v2 Tags|ID3v2Tags]] for a list of proposed frames tagger applications could write. The following descriptions are summerized in a table below, for more information on how to use ID3v2 tags in your own applications read the specifications on [http://www.id3.org/ http://www.id3.org/]. |
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Note: for each text frame ('''T'''XXX) the encoding of the value strings can be defined in the frame header. ID3v2.3 supports UTF-16 and ISO-8859-1 encoded strings; ID3v2.4 has addional support for UTF-8 and UTF-16BE. [[MusicBrainz]] Identifiers must be encoded as ISO-8859-1 strings. |
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ID3v2 frames can be stored in any order in the MP3 file. |
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===General Frames=== |
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The following frames are used for the regular information from the database: '''TPE1''' for the main artist name, '''TALB''' for the album name, '''TIT2''' for the track title, '''TRCK''' for the track number on the album (without total number of tracks in the old [[MusicBrainz Tagger|MusicBrainzTagger]] and [[Picard Tagger|PicardTagger]] < 0.5.1 and with totals since [[Picard Tagger|PicardTagger]] 0.5.1). |
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'''TCMP''' is a nonstandard tag that defines a track as being part of a compilation (VA album) if set to the string value '''"1"''' or part of a single artist album if set to the string value '''"0"'''. It is used by the iTunes music player software. |
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====Artist Sortname==== |
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The artist sortname is stored in the '''TSOP''' frame for ID3v2.4 and in the experimental '''XSOP''' frame for ID3v2.3. |
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====Release Date==== |
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ID3v2.3 is missing a standard frame for a detailed date. Therefore the experimental '''XDOR''' frame is used and the additional '''TORY''' that stores the year of release as a 4 digit number only is used. |
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In ID3v2.4 only the '''TDRL''' frame is used to store the complete release date in <code><nowiki>yyyy-MM-dd</nowiki></code> format. |
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===Music Brainz Identifier=== |
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To store the [[MusicBrainz Identifier|MusicBrainzIdentifier]]<code><nowiki></nowiki></code>s in an ID3v2 tag, you will need to use a '''UFID''' frame for the [[Track ID|TrackID]], and some user defined '''TXXX''' text frames for the artist, album, album artist and PUID as well as the album status and type. Please note that for ease of use these ID3 frames are specified to use ISO 8859-1. However, the types of characters used to express these tags are the same in ISO 8859-1 and UTF-8, since UTF-8 is backward compatible with 7-bit ASCII. |
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====MusicBrainz Track Identifier==== |
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The ''MusicBrainz Track Id'' is the internal unique ID [[MusicBrainz]] defines for every object in its database. It is stored in the special '''UFID''' frame, that contains two parts: The ''Owner Identifier'' selects the namespace where the identifies is unique. For [[MusicBrainz]] it is be guaranteed that this ID is unique on the server; therefore the default owner identifier is <code><nowiki>http://musicbrainz.org</nowiki></code>. The second part is the [[Track ID|TrackID]] for the track as stored in the [[MusicBrainz]] database. |
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====MusicBrainz Artist Identifier==== |
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The ''MusicBrainz Artist Id'' is stored in a user defined '''TXXX''' text information frame, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. Its value is the [[Artist ID|ArtistID]] as stored in the [[MusicBrainz]] database. |
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====MusicBrainz Album Identifier==== |
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The ''MusicBrainz Album Id'' is stored in a user defined '''TXXX''' text information frame, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. Its value is the [[Release ID|AlbumID]] as stored in the [[MusicBrainz]] database. |
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====MusicBrainz Album Artist Identifier==== |
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The ''MusicBrainz Album Artist Id'' is used to store an artist identifier for the album the track is on. This is only for [[Various Artists Release|VariousArtistsRelease]]<code><nowiki></nowiki></code>s where the tracks have multiple different artists and the album itself is by the special artist ''[[Various Artists|VariousArtists]]'' with [[Artist ID|ArtistID]] <code><nowiki>89ad4ac3-39f7-470e-963a-56509c546377</nowiki></code>. |
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It is stored in a user defined '''TXXX''' text information frame, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. Its value is the [[Artist ID|ArtistID]] as stored in the [[MusicBrainz]] database. |
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====MusicBrainz Album Status==== |
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This stores the status of the album the track is from, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. At the moment the possible values are: ''official'', ''promotional'', ''bootleg''. |
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====MusicBrainz Album Type==== |
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This type the status of the album the track is from, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. Possible values are: ''album'', ''single'', ''live'' e.a. |
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====MusicIP PUID Identifier==== |
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The ''MusicIP PUID'' is stored in a user defined '''TXXX''' text information frame, encoded as a <code><nowiki>0x00</nowiki></code> terminated ISO-8859-1 string. Its value is the track's [[PUID]] as stored in the [[MusicBrainz]] database. |
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==Vorbis/FLAC comment specifications== |
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In contrast to the various possibilities of ID3 tagging, Vorbis and FLAC tags are stored in a unified way. All strings are encoded as UTF-8, tagged data is stored in the so called [http://www.xiph.org/vorbis/doc/v-comment.html comment header], each key value pair is specified as a tripplet of the form: <code><nowiki>[length in bytes][key]=[value]</nowiki></code>. Strings are not terminated. For proposed extensions to the default comment tags see [http://reactor-core.org/ogg-tag-recommendations.html Ogg Vorbis Comment Field Recommendations] and [http://www.gophernet.org/articles/vorbiscomment.html Extending Vorbis Comments]. |
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Note, that <code><nowiki>RELEASECOUNTRY</nowiki></code> is no standard tag and not mentioned in any of the proposals; <code><nowiki>DATE</nowiki></code> was originally specified to store the recording date while [[MusicBrainz]] defines only release dates. |
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The different comment names and their equivalent ID3v2 frames can be found in the table below. |
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==Overview== |
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'''Tags defined by MusicBrainz''' |
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{| border="1" |
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| '''Value''' || '''ID3v2''' || '''Vorbis Comments''' || '''MP4 (iTunes) tags''' || '''Windows Media''' |
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| MusicBrainz Track Id || UFID:<code><nowiki>http://musicbrainz.org</nowiki></code> || MUSICBRAINZ_TRACKID || ----:MusicBrainz Track Id || MusicBrainz/Track Id |
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| MusicBrainz Artist Id || TXXX:MusicBrainz Artist Id || MUSICBRAINZ_ARTISTID || ----:MusicBrainz Artist Id || MusicBrainz/Artist Id |
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| MusicBrainz Album Id || TXXX:MusicBrainz Album Id || MUSICBRAINZ_ALBUMID || ----:MusicBrainz Album Id || MusicBrainz/Album Id |
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| MusicBrainz Album Artist Id || TXXX:MusicBrainz Album Artist Id || MUSICBRAINZ_ALBUMARTISTID || ----:MusicBrainz Album Artist Id || MusicBrainz/Album Artist Id |
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| MusicBrainz Disc Id || TXXX:MusicBrainz Disc Id || MUSICBRAINZ_DISCID || ----:MusicBrainz Disc Id || MusicBrainz/Disc Id |
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| MusicBrainz Album Status || TXXX:MusicBrainz Album Status || MUSICBRAINZ_ALBUMSTATUS || ----:MusicBrainz Album Status || MusicBrainz/Album Status |
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| MusicBrainz Album Type || TXXX:MusicBrainz Album Type || MUSICBRAINZ_ALBUMTYPE || ----:MusicBrainz Album Type || MusicBrainz/Album Type |
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| MusicBrainz Album Release Country || TXXX:MusicBrainz Album Release Country || RELEASECOUNTRY || ----:MusicBrainz Album Release Country || MusicBrainz/Album Release Country |
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| MusicIP PUID || TXXX:MusicIP PUID || MUSICIP_PUID || ----:MusicIP PUID || MusicIP/PUID |
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|} |
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'''Other important standard tags''' |
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{| border="1" |
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| '''Value''' || '''ID3v2''' || '''Vorbis Comments''' || '''MP4 (iTunes) tags''' || '''Windows Media''' |
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| Artist || TPE1 || ARTIST || ©ART || Author |
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| Album Artist || TPE2 || ALBUMARTIST || aART || WM/AlbumArtist |
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| Album || TALB || ALBUM || ©alb || WM/AlbumTitle |
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| Title || TIT2 || TITLE || ©nam || Title |
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| Track Number || TRCK || TRACKNUMBER || trkn || WM/TrackNumber |
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| Release Date || TYER + TDAT (2.3), TDRC (2.4) || DATE || ©day || WM/Year |
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| isCompilation || TCMP || COMPILATION || cpil || WM/IsCompilation |
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| Album Artist Sortname || TSO2 + TXXX:ALBUMARTISTSORT || ALBUMARTISTSORT || soaa || WM/AlbumArtistSortOrder |
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| Artist Sortname || XSOP (2.3), TSOP (2.4) || ARTISTSORT || soar || WM/ArtistSortOrder |
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|} |
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[http://www.musicbrainz.org/docs/specs/metadata_tags.html OriginalVersion] |
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[[Category:To Be Reviewed]] [[Category:Documentation]] |
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Latest revision as of 22:52, 20 May 2015
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