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# AVMetadataKey

A structure that defines a metadata key.

```
struct AVMetadataKey
```

## Topics

### Common metadata keys

[`AVMetadataCommonKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/commonKeyAccessibilityDescription)

A key that represents the accessibility description for the media.

[`AVMetadataCommonKeyAlbumName`](/documentation/AVFoundation/AVMetadataKey/commonKeyAlbumName)

A key that represents the name of the album.

[`AVMetadataCommonKeyArtist`](/documentation/AVFoundation/AVMetadataKey/commonKeyArtist)

A key that represents the name of the artist.

[`AVMetadataCommonKeyArtwork`](/documentation/AVFoundation/AVMetadataKey/commonKeyArtwork)

A key that represents an image relating to the album.

[`AVMetadataCommonKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/commonKeyAuthor)

A key that represents the name of the author.

[`AVMetadataCommonKeyContributor`](/documentation/AVFoundation/AVMetadataKey/commonKeyContributor)

A key that represents the name of the contributor.

[`AVMetadataCommonKeyCopyrights`](/documentation/AVFoundation/AVMetadataKey/commonKeyCopyrights)

A key that represents the copyright statement.

[`AVMetadataCommonKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/commonKeyCreationDate)

A key that represents the date of the original recording.

[`AVMetadataCommonKeyCreator`](/documentation/AVFoundation/AVMetadataKey/commonKeyCreator)

A key that represents the name of the creator.

[`AVMetadataCommonKeyDescription`](/documentation/AVFoundation/AVMetadataKey/commonKeyDescription)

A key that represents the description of the media.

[`AVMetadataCommonKeyFormat`](/documentation/AVFoundation/AVMetadataKey/commonKeyFormat)

A key that represents the file format of the media content.

[`AVMetadataCommonKeyIdentifier`](/documentation/AVFoundation/AVMetadataKey/commonKeyIdentifier)

A key that represents the ID for the media.

[`AVMetadataCommonKeyLanguage`](/documentation/AVFoundation/AVMetadataKey/commonKeyLanguage)

A key that represents the language of the text or lyrics spoken or sung in the audio.

[`AVMetadataCommonKeyLastModifiedDate`](/documentation/AVFoundation/AVMetadataKey/commonKeyLastModifiedDate)

A key that represents the last modification date of the media.

[`AVMetadataCommonKeyLocation`](/documentation/AVFoundation/AVMetadataKey/commonKeyLocation)

A key that represents the location information for the media.

[`AVMetadataCommonKeyMake`](/documentation/AVFoundation/AVMetadataKey/commonKeyMake)

A key that represents the name of the camera maker.

[`AVMetadataCommonKeyModel`](/documentation/AVFoundation/AVMetadataKey/commonKeyModel)

A key that represents the name of the camera model.

[`AVMetadataCommonKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/commonKeyPublisher)

A key that represents the name of the publisher.

[`AVMetadataCommonKeyRelation`](/documentation/AVFoundation/AVMetadataKey/commonKeyRelation)

A key that represents the relation information for the media.

[`AVMetadataCommonKeySoftware`](/documentation/AVFoundation/AVMetadataKey/commonKeySoftware)

A key that represents the name of the software used to create the media.

[`AVMetadataCommonKeySource`](/documentation/AVFoundation/AVMetadataKey/commonKeySource)

A key that represents the source information for the media.

[`AVMetadataCommonKeySubject`](/documentation/AVFoundation/AVMetadataKey/commonKeySubject)

A key that represents the subject information for the media.

[`AVMetadataCommonKeyTitle`](/documentation/AVFoundation/AVMetadataKey/commonKeyTitle)

A key that represents the title of the media.

[`AVMetadataCommonKeyType`](/documentation/AVFoundation/AVMetadataKey/commonKeyType)

A key that represents the media type.

### iTunes metadata keys

[`AVMetadataiTunesMetadataKeyAccountKind`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAccountKind)

A key that represents the kind of iTunes account.

[`AVMetadataiTunesMetadataKeyAcknowledgement`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAcknowledgement)

A key that represents the acknowledgement information in iTunes.

[`AVMetadataiTunesMetadataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAlbum)

A key that represents the name of the album in iTunes.

[`AVMetadataiTunesMetadataKeyAlbumArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAlbumArtist)

A key that represents the artist for the album.

[`AVMetadataiTunesMetadataKeyAppleID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAppleID)

A key that represents an Apple ID.

[`AVMetadataiTunesMetadataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArranger)

A key that represents the name of the arranger.

[`AVMetadataiTunesMetadataKeyArtDirector`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtDirector)

A key that represents the name of the art director.

[`AVMetadataiTunesMetadataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtist)

A key that represents the name of the artist.

[`AVMetadataiTunesMetadataKeyArtistID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyArtistID)

A key that represents the ID for an artist.

[`AVMetadataiTunesMetadataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyAuthor)

A key that represents the name of the author.

[`AVMetadataiTunesMetadataKeyBeatsPerMin`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyBeatsPerMin)

A key that represents the beats per minute of a track in iTunes.

[`AVMetadataiTunesMetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyComposer)

A key that represents the name of the composer.

[`AVMetadataiTunesMetadataKeyConductor`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyConductor)

A key that represents the name of the conductor.

[`AVMetadataiTunesMetadataKeyContentRating`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyContentRating)

A key that represents the content rating in iTunes.

[`AVMetadataiTunesMetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCopyright)

A key that represents the copyright statement in iTunes.

[`AVMetadataiTunesMetadataKeyCoverArt`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCoverArt)

A key that represents an album cover image.

[`AVMetadataiTunesMetadataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyCredits)

A key that represents the credits for the source content.

[`AVMetadataiTunesMetadataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDescription)

A key that represents the description information in iTunes.

[`AVMetadataiTunesMetadataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDirector)

A key that represents the name of the director.

[`AVMetadataiTunesMetadataKeyDiscCompilation`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDiscCompilation)

A key that represents whether an album is a compilation of tracks in iTunes.

[`AVMetadataiTunesMetadataKeyDiscNumber`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyDiscNumber)

A key that represents the disc number of a multi-CD album in iTunes.

[`AVMetadataiTunesMetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEncodedBy)

A key that represents the person or organization that encoded the media.

[`AVMetadataiTunesMetadataKeyEncodingTool`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEncodingTool)

A key that represents the software or hardware and settings used for encoding.

[`AVMetadataiTunesMetadataKeyEQ`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyEQ)

A key that represents the equalizer preset option in iTunes.

[`AVMetadataiTunesMetadataKeyExecProducer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyExecProducer)

A key that represents the name of the executive producer.

[`AVMetadataiTunesMetadataKeyGenreID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyGenreID)

A key that represents the genre ID.

[`AVMetadataiTunesMetadataKeyGrouping`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyGrouping)

A key that represents additional grouping information for an album.

[`AVMetadataiTunesMetadataKeyLinerNotes`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyLinerNotes)

A key that represents the digital booklet for an album.

[`AVMetadataiTunesMetadataKeyLyrics`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyLyrics)

A key that represents the lyrics in the recording.

[`AVMetadataiTunesMetadataKeyOnlineExtras`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyOnlineExtras)

A key that represents the extra materials for an album.

[`AVMetadataiTunesMetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyOriginalArtist)

A key that represents the name of the original artist.

[`AVMetadataiTunesMetadataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPerformer)

A key that represents the name of the performer.

[`AVMetadataiTunesMetadataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`AVMetadataiTunesMetadataKeyPlaylistID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPlaylistID)

A key that represents the playlist ID.

[`AVMetadataiTunesMetadataKeyPredefinedGenre`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPredefinedGenre)

A key that represents the predefined genre.

[`AVMetadataiTunesMetadataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyProducer)

A key that represents the name of the producer.

[`AVMetadataiTunesMetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyPublisher)

A key that represents the name of the publisher.

[`AVMetadataiTunesMetadataKeyRecordCompany`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyRecordCompany)

A key that represents the name of the record company.

[`AVMetadataiTunesMetadataKeyReleaseDate`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyReleaseDate)

A key that represents the release date for the original recording.

[`AVMetadataiTunesMetadataKeySoloist`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySoloist)

A key that represents the name of the soloist.

[`AVMetadataiTunesMetadataKeySongID`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySongID)

A key that represents the song ID.

[`AVMetadataiTunesMetadataKeySongName`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySongName)

A key that represents the name of the song in iTunes.

[`AVMetadataiTunesMetadataKeySoundEngineer`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeySoundEngineer)

A key that represents the name of the sound engineer.

[`AVMetadataiTunesMetadataKeyThanks`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyThanks)

A key that represents the thanks statement in iTunes.

[`AVMetadataiTunesMetadataKeyTrackNumber`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyTrackNumber)

A key that represents the order number in iTunes.

[`AVMetadataiTunesMetadataKeyTrackSubTitle`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyTrackSubTitle)

A key that represents the information relating to the contents title.

[`AVMetadataiTunesMetadataKeyUserComment`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyUserComment)

A key that represents a user comment regarding the content.

[`AVMetadataiTunesMetadataKeyUserGenre`](/documentation/AVFoundation/AVMetadataKey/iTunesMetadataKeyUserGenre)

A key that represents the genre set by a user in iTunes.

### QuickTime metadata keys

[`AVMetadataQuickTimeMetadataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAccessibilityDescription)

A key that represents the accessibility description for the movie file content.

[`AVMetadataQuickTimeMetadataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAlbum)

A key that represents the name of the album or collection in QuickTime.

[`AVMetadataQuickTimeMetadataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArranger)

A key that represents the name of the arranger of the movie file content.

[`AVMetadataQuickTimeMetadataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArtist)

A key that represents the name of the artist of the movie file content.

[`AVMetadataQuickTimeMetadataKeyArtwork`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyArtwork)

A key that represents an image relating to the movie file content.

[`AVMetadataQuickTimeMetadataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyAuthor)

A key that represents the name of the author of the movie file content.

[`AVMetadataQuickTimeMetadataKeyCameraFocalLength35mmEquivalent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraFocalLength35mmEquivalent)

A value of type kCMMetadataBaseDataType_UTF8 indicating focal length normalized to the 35mm film equivalent value (e.g. “50.00mm”).

[`AVMetadataQuickTimeMetadataKeyCameraFrameReadoutTime`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraFrameReadoutTime)

A key that represents the camera frame readout time in QuickTime.

[`AVMetadataQuickTimeMetadataKeyCameraISOSensitivity`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraISOSensitivity)

A value of type kCMMetadataBaseDataType_UTF8 indicating the sensitivity of the camera to light in terms of ISO exposure index (e.g. “800”). See SMPTE RDD 18.

[`AVMetadataQuickTimeMetadataKeyCameraIdentifier`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraIdentifier)

A key that represents the camera identifier in QuickTime.

[`AVMetadataQuickTimeMetadataKeyCameraLensIrisFNumber`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraLensIrisFNumber)

A value of type kCMMetadataBaseDataType_UTF8 indicating measure of the amount of light transmitted through the lens. It is the focal length divided by the effective lens aperture diameter (e.g. “F2.8” or “2.8”).

[`AVMetadataQuickTimeMetadataKeyCameraLensModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraLensModel)

A value of type kCMMetadataBaseDataType_UTF8 indicating the lens model (e.g. “iPhone 16 Pro back camera 6.765mm f/1.78”).

[`AVMetadataQuickTimeMetadataKeyCameraShutterSpeedAngle`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraShutterSpeedAngle)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as an angle in minutes (1/60 degree) (e.g. “21600” or “360.00deg””).

[`AVMetadataQuickTimeMetadataKeyCameraShutterSpeedTime`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraShutterSpeedTime)

A value of type kCMMetadataBaseDataType_UTF8 indicating the exposure period expressed as a time per one frame/field period in seconds.

[`AVMetadataQuickTimeMetadataKeyCameraWhiteBalance`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCameraWhiteBalance)

A value of type kCMMetadataBaseDataType_UTF8 indicating the white balance value defined by the temperature in Kelvin units (e.g. “5500K” or “5500”). See SMPTE RDD 18.

[`AVMetadataQuickTimeMetadataKeyCinematicVideoIntent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCinematicVideoIntent)

A value of type `kCMMetadataBaseDataType_UInt8` indicating whether this movie is intended as a Cinematic Video (1) or not (0).

[`AVMetadataQuickTimeMetadataKeyCollectionUser`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCollectionUser)

A key that represents a name that indicates a user-defined collection.

[`AVMetadataQuickTimeMetadataKeyComment`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyComment)

A key that represents a comment regarding the movie file content.

[`AVMetadataQuickTimeMetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyComposer)

A key that represents the name of the composer of the movie file content.

[`AVMetadataQuickTimeMetadataKeyContentIdentifier`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyContentIdentifier)

A key that represents the content identifier in QuickTime.

[`AVMetadataQuickTimeMetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCopyright)

A key that represents the copyright statement for the movie file content.

[`AVMetadataQuickTimeMetadataKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCreationDate)

A key that represents the creation date of the movie file content.

[`AVMetadataQuickTimeMetadataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyCredits)

A key that represents the credits of the movie source content.

[`AVMetadataQuickTimeMetadataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDescription)

A key that represents the description of the movie file content.

[`AVMetadataQuickTimeMetadataKeyDirectionFacing`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirectionFacing)

A key that represents the direction the camera is facing during the shot.

[`AVMetadataQuickTimeMetadataKeyDirectionMotion`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirectionMotion)

A key that represents the direction the camera is moving during the shot.

[`AVMetadataQuickTimeMetadataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDirector)

A key that represents the name of the director of the movie file content.

[`AVMetadataQuickTimeMetadataKeyDisplayName`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyDisplayName)

A key that represents the display name of the movie file content.

[`AVMetadataQuickTimeMetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyEncodedBy)

A key that represents the name of the person or organization responsible for encoding the movie file content.

[`AVMetadataQuickTimeMetadataKeyFullFrameRatePlaybackIntent`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyFullFrameRatePlaybackIntent)

An key that represents whether this movie should play at full frame rate.

[`AVMetadataQuickTimeMetadataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyGenre)

A key that represents the genre or genres to which the movie content conforms.

[`AVMetadataQuickTimeMetadataKeyInformation`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyInformation)

A key that represents general information about the movie file content.

[`AVMetadataQuickTimeMetadataKeyIsMontage`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyIsMontage)

A key that represents that the movie is a montage of other media.

[`AVMetadataQuickTimeMetadataKeyKeywords`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyKeywords)

A key that represents the keywords for the movie file content.

[`AVMetadataQuickTimeMetadataKeyLocationBody`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationBody)

A key that represents the astronomical body for compatibility with the 3GPP format.

[`AVMetadataQuickTimeMetadataKeyLocationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationDate)

A key that represents a date and time using the extended format defined in ISO 8601:2004.

[`AVMetadataQuickTimeMetadataKeyLocationISO6709`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationISO6709)

A key that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`AVMetadataQuickTimeMetadataKeyLocationName`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationName)

A key that represents the name of the location.

[`AVMetadataQuickTimeMetadataKeyLocationNote`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationNote)

A key that represents a descriptive comment about the location.

[`AVMetadataQuickTimeMetadataKeyLocationRole`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyLocationRole)

A key that represents the single byte describing the movie location.

[`AVMetadataQuickTimeMetadataKeyMake`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyMake)

A key that represents the name of the camera maker.

[`AVMetadataQuickTimeMetadataKeyModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyModel)

A key that represents the name of the camera model.

[`AVMetadataQuickTimeMetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyOriginalArtist)

A key that represents the name of the original artist of the movie file content.

[`AVMetadataQuickTimeMetadataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPerformer)

A key that represents the name of the performer in the movie file content.

[`AVMetadataQuickTimeMetadataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`AVMetadataQuickTimeMetadataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyProducer)

A key that represents the name of the producer of the movie file content.

[`AVMetadataQuickTimeMetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyPublisher)

A key that represents the name of the publisher of the movie file content.

[`AVMetadataQuickTimeMetadataKeyRatingUser`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyRatingUser)

A key that represents the rating or relative value of the movie.

[`AVMetadataQuickTimeMetadataKeySoftware`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeySoftware)

A key that represents the name of software used to create the movie file content.

[`AVMetadataQuickTimeMetadataKeyTitle`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyTitle)

A key that represents the title of the movie file content.

[`AVMetadataQuickTimeMetadataKeyWhiteBalanceByCCTColorMatrices`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyWhiteBalanceByCCTColorMatrices)

A value of type kCMMetadataBaseDataType_RawData indicating the reference color translation matrix data for ProRes RAW.

[`AVMetadataQuickTimeMetadataKeyWhiteBalanceByCCTWhiteBalanceFactors`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyWhiteBalanceByCCTWhiteBalanceFactors)

A value of type kCMMetadataBaseDataType_RawData indicating the reference white balance multiplication factor data for ProRes RAW.

[`AVMetadataQuickTimeMetadataKeyYear`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyYear)

A key that represents the recording year of the movie file content.

[`AVMetadataQuickTimeMetadataKeyiXML`](/documentation/AVFoundation/AVMetadataKey/quickTimeMetadataKeyiXML)

A key that represents iXML information for the movie file content.

### QuickTime user metadata keys

[`AVMetadataQuickTimeUserDataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAccessibilityDescription)

A key that represents the accessibility description for the movie file content.

[`AVMetadataQuickTimeUserDataKeyAlbum`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAlbum)

A key that represents the name of the album or collection in QuickTime.

[`AVMetadataQuickTimeUserDataKeyArranger`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyArranger)

A key that represents the name of the arranger of the movie file content.

[`AVMetadataQuickTimeUserDataKeyArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyArtist)

A key that represents the name of the artist of the movie file content.

[`AVMetadataQuickTimeUserDataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyAuthor)

A key that represents the name of the author of the movie file content.

[`AVMetadataQuickTimeUserDataKeyChapter`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyChapter)

A key that represents the name of the chapter.

[`AVMetadataQuickTimeUserDataKeyComment`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyComment)

A key that represents a comment regarding the movie file content.

[`AVMetadataQuickTimeUserDataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyComposer)

A key that represents the name of the composer of the movie file content.

[`AVMetadataQuickTimeUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCopyright)

A key that represents the copyright statement in QuickTime.

[`AVMetadataQuickTimeUserDataKeyCreationDate`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCreationDate)

A key that represents the creation date of the movie file content.

[`AVMetadataQuickTimeUserDataKeyCredits`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyCredits)

A key that represents the credits of movie source content.

[`AVMetadataQuickTimeUserDataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDescription)

A key that represents the description of the movie file content.

[`AVMetadataQuickTimeUserDataKeyDirector`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDirector)

A key that represents the name of the director of the movie file content.

[`AVMetadataQuickTimeUserDataKeyDisclaimer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyDisclaimer)

A key that represents the disclaimer regarding the movie file content.

[`AVMetadataQuickTimeUserDataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyEncodedBy)

A key that represents the name of the person or organization responsible for encoding the movie file content.

[`AVMetadataQuickTimeUserDataKeyFullName`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyFullName)

A key that represents the full name of the movie file content.

[`AVMetadataQuickTimeUserDataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyGenre)

A key that represents the genre or genres to which the movie content conforms.

[`AVMetadataQuickTimeUserDataKeyHostComputer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyHostComputer)

A key that represents the name of the host computer.

[`AVMetadataQuickTimeUserDataKeyInformation`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyInformation)

A key that represents general information about the movie file content.

[`AVMetadataQuickTimeUserDataKeyKeywords`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyKeywords)

A key that represents the keywords for the movie file content.

[`AVMetadataQuickTimeUserDataKeyLocationISO6709`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyLocationISO6709)

A key that represents the geographic point location by coordinates as defined in ISO 6709:2008.

[`AVMetadataQuickTimeUserDataKeyMake`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyMake)

A key that represents the name of the camera maker.

[`AVMetadataQuickTimeUserDataKeyModel`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyModel)

A key that represents the name of the camera model.

[`AVMetadataQuickTimeUserDataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalArtist)

A key that represents the name of the original artist of the movie file content.

[`AVMetadataQuickTimeUserDataKeyOriginalFormat`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalFormat)

A key that represents the original format of the movie file content.

[`AVMetadataQuickTimeUserDataKeyOriginalSource`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyOriginalSource)

A key that represents the original source of the movie file content.

[`AVMetadataQuickTimeUserDataKeyPerformers`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPerformers)

A key that represents the name of the performers in the movie file content.

[`AVMetadataQuickTimeUserDataKeyPhonogramRights`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPhonogramRights)

A key that represents the phonogram rights statement.

[`AVMetadataQuickTimeUserDataKeyProducer`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyProducer)

A key that represents the name of the producer of the movie file content.

[`AVMetadataQuickTimeUserDataKeyProduct`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyProduct)

A key that represents the name of the product.

[`AVMetadataQuickTimeUserDataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyPublisher)

A key that represents the name of the publisher of the movie file content.

[`AVMetadataQuickTimeUserDataKeySoftware`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeySoftware)

A key that represents the name of software used to create the movie file content.

[`AVMetadataQuickTimeUserDataKeySpecialPlaybackRequirements`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeySpecialPlaybackRequirements)

A key that represents the special hardware and software requirements for playback.

[`AVMetadataQuickTimeUserDataKeyTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTaggedCharacteristic)

A key that represents the tagged characteristic.

[`AVMetadataQuickTimeUserDataKeyTrack`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTrack)

A key that represents a track in the movie file content.

[`AVMetadataQuickTimeUserDataKeyTrackName`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyTrackName)

A key that represents the name of a track in the movie file content.

[`AVMetadataQuickTimeUserDataKeyURLLink`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyURLLink)

A key that represents the webpage for the movie file content.

[`AVMetadataQuickTimeUserDataKeyWarning`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyWarning)

A key that represents the warning text for the movie file content.

[`AVMetadataQuickTimeUserDataKeyWriter`](/documentation/AVFoundation/AVMetadataKey/quickTimeUserDataKeyWriter)

A key that represents the name of the writer of the movie file content.

### ID3 metadata keys

[`AVMetadataID3MetadataKeyAlbumSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAlbumSortOrder)

A key that represents how to sort the album.

[`AVMetadataID3MetadataKeyAlbumTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAlbumTitle)

A key that represents the title of the recording.

[`AVMetadataID3MetadataKeyAttachedPicture`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAttachedPicture)

A key that represents an image relating to the audio file.

[`AVMetadataID3MetadataKeyAudioEncryption`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAudioEncryption)

A key that represents the encryption details of the audio stream.

[`AVMetadataID3MetadataKeyAudioSeekPointIndex`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyAudioSeekPointIndex)

A key that represents the list of seek points within the audio file.

[`AVMetadataID3MetadataKeyBand`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyBand)

A key that represents additional information about the performers in the recording.

[`AVMetadataID3MetadataKeyBeatsPerMinute`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyBeatsPerMinute)

A key that represents the beats per minute of the audio.

[`AVMetadataID3MetadataKeyComments`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyComments)

A key that represents additional text information for the media.

[`AVMetadataID3MetadataKeyCommercial`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommercial)

A key that represents the commercial details for the media.

[`AVMetadataID3MetadataKeyCommercialInformation`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommercialInformation)

A key that represents the webpage containing purchasing information.

[`AVMetadataID3MetadataKeyComposer`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyComposer)

A key that represents the name of the composer.

[`AVMetadataID3MetadataKeyConductor`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyConductor)

A key that represents the name of the conductor.

[`AVMetadataID3MetadataKeyContentGroupDescription`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyContentGroupDescription)

A key that indicates the sound belongs to a larger category of sounds or music.

[`AVMetadataID3MetadataKeyContentType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyContentType)

A key that represents the media content type.

[`AVMetadataID3MetadataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCopyright)

A key that represents the copyright statement.

[`AVMetadataID3MetadataKeyCopyrightInformation`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCopyrightInformation)

A key that represents the webpage describing the terms of use and ownership.

[`AVMetadataID3MetadataKeyDate`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyDate)

A key that represents the date for the recording.

[`AVMetadataID3MetadataKeyEncodedBy`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodedBy)

A key that represents the person or organization responsible for encoding the media.

[`AVMetadataID3MetadataKeyEncodedWith`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodedWith)

A key that represents the software or hardware and settings used for encoding.

[`AVMetadataID3MetadataKeyEncodingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncodingTime)

A key that represents the encoding time of the audio.

[`AVMetadataID3MetadataKeyEncryption`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEncryption)

A key that represents the encryption method used.

[`AVMetadataID3MetadataKeyEqualization`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEqualization)

A key that represents the equalization curve within the audio file.

[`AVMetadataID3MetadataKeyEqualization2`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEqualization2)

A key that represents the equalization curve within the audio file.

[`AVMetadataID3MetadataKeyEventTimingCodes`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyEventTimingCodes)

A key that represents the timing codes used for synchronization with key events in a song or sound.

[`AVMetadataID3MetadataKeyFileOwner`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyFileOwner)

A key that represents the name of the owner or licensee of the file and it’s contents.

[`AVMetadataID3MetadataKeyFileType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyFileType)

A key that represents the file type of the audio.

[`AVMetadataID3MetadataKeyGeneralEncapsulatedObject`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyGeneralEncapsulatedObject)

A key that represents the details of a file.

[`AVMetadataID3MetadataKeyGroupIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyGroupIdentifier)

A key that represents the grouping of distinct frames.

[`AVMetadataID3MetadataKeyInitialKey`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInitialKey)

A key that represents the musical key in which the sound starts.

[`AVMetadataID3MetadataKeyInternationalStandardRecordingCode`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternationalStandardRecordingCode)

A key that represents the international standard recording code.

[`AVMetadataID3MetadataKeyInternetRadioStationName`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternetRadioStationName)

A key that represents the name of the internet radio station streaming the audio.

[`AVMetadataID3MetadataKeyInternetRadioStationOwner`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInternetRadioStationOwner)

A key that represents the name of the owner of the internet radio station streaming the audio.

[`AVMetadataID3MetadataKeyInvolvedPeopleList_v23`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInvolvedPeopleList_v23)

A key that represents the list of names of contributors to the media.

[`AVMetadataID3MetadataKeyInvolvedPeopleList_v24`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyInvolvedPeopleList_v24)

A key that represents the list of names of contributors to the media.

[`AVMetadataID3MetadataKeyLanguage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLanguage)

A key that represents the language of the text or lyrics spoken or sung in the audio.

[`AVMetadataID3MetadataKeyLeadPerformer`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLeadPerformer)

A key that represents the main artist of the recording.

[`AVMetadataID3MetadataKeyLength`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLength)

A key that represents the length of the audio file in milliseconds.

[`AVMetadataID3MetadataKeyLink`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLink)

A key that represents the link information from an ID3 tag that might reside in another audio file or alone in a binary file.

[`AVMetadataID3MetadataKeyLyricist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyLyricist)

A key that represents the writer(s) of the text or lyrics in the recording.

[`AVMetadataID3MetadataKeyMediaType`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMediaType)

A key that represents which media the sound originated from.

[`AVMetadataID3MetadataKeyModifiedBy`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyModifiedBy)

A key that represents the people behind a remix and similar interpretations of another existing piece.

[`AVMetadataID3MetadataKeyMood`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMood)

A key that represents the mood of the audio.

[`AVMetadataID3MetadataKeyMPEGLocationLookupTable`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMPEGLocationLookupTable)

A key that represents the lookup table used to increase performance and accuracy of jumps within an MPEG audio file.

[`AVMetadataID3MetadataKeyMusicCDIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMusicCDIdentifier)

A key that represents the ID used to identify the CD in databases such as the Compact Disc Database.

[`AVMetadataID3MetadataKeyMusicianCreditsList`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyMusicianCreditsList)

A key that represents the mapping between an instrument and the musician that played it.

[`AVMetadataID3MetadataKeyOfficialArtistWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialArtistWebpage)

A key that represents the artist’s official webpage.

[`AVMetadataID3MetadataKeyOfficialAudioFileWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialAudioFileWebpage)

A key that represents the official webpage for the audio file.

[`AVMetadataID3MetadataKeyOfficialAudioSourceWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialAudioSourceWebpage)

A key that represents the official webpage for the source of the audio file.

[`AVMetadataID3MetadataKeyOfficialInternetRadioStationHomepage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialInternetRadioStationHomepage)

A key that represents the official homepage of the internet radio station.

[`AVMetadataID3MetadataKeyOfficialPublisherWebpage`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOfficialPublisherWebpage)

A key that represents the official webpage for the publisher.

[`AVMetadataID3MetadataKeyOriginalAlbumTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalAlbumTitle)

A key that represents the title of the original recording or source of sound.

[`AVMetadataID3MetadataKeyOriginalArtist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalArtist)

A key that represents the performer(s) of the original recording.

[`AVMetadataID3MetadataKeyOriginalFilename`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalFilename)

A key that represents the original filename for the recording.

[`AVMetadataID3MetadataKeyOriginalLyricist`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalLyricist)

A key that represents the text writer(s) of the original recording.

[`AVMetadataID3MetadataKeyOriginalReleaseTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalReleaseTime)

A key that represents the release time for the original recording.

[`AVMetadataID3MetadataKeyOriginalReleaseYear`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOriginalReleaseYear)

A key that represents the release year for the original recording.

[`AVMetadataID3MetadataKeyOwnership`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyOwnership)

A key that represents the transaction details indicating proof of ownership if signed.

[`AVMetadataID3MetadataKeyPartOfASet`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPartOfASet)

A key that represents the part of a set the audio came from.

[`AVMetadataID3MetadataKeyPayment`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPayment)

A key that represents the webpage that handles the process of paying for the audio file.

[`AVMetadataID3MetadataKeyPerformerSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPerformerSortOrder)

A key that represents the performer sort order.

[`AVMetadataID3MetadataKeyPlayCounter`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPlayCounter)

A key that represents the play count of the audio file.

[`AVMetadataID3MetadataKeyPlaylistDelay`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPlaylistDelay)

A key that represents the number of milliseconds of silence between every song in a playlist.

[`AVMetadataID3MetadataKeyPopularimeter`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPopularimeter)

A key that represents the rating for the audio file.

[`AVMetadataID3MetadataKeyPositionSynchronization`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPositionSynchronization)

A key that represents the time offset of the first frame in the stream.

[`AVMetadataID3MetadataKeyPrivate`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPrivate)

A key that represents the information from a software producer that its program uses.

[`AVMetadataID3MetadataKeyProducedNotice`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyProducedNotice)

A key that represents the produced notice.

[`AVMetadataID3MetadataKeyPublisher`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyPublisher)

A key that represents the name of the label or publisher.

[`AVMetadataID3MetadataKeyRecommendedBufferSize`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecommendedBufferSize)

A key that represents the buffer size the server recommends.

[`AVMetadataID3MetadataKeyRecordingDates`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecordingDates)

A key that represents additional recording dates that complement year, date, and time keys.

[`AVMetadataID3MetadataKeyRecordingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRecordingTime)

A key that represents the recording time.

[`AVMetadataID3MetadataKeyRelativeVolumeAdjustment`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRelativeVolumeAdjustment)

A key that represents the increase or decrease of volume on each channel while the file plays.

[`AVMetadataID3MetadataKeyRelativeVolumeAdjustment2`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyRelativeVolumeAdjustment2)

A key that represents the increase or decrease of volume on each channel while the file plays.

[`AVMetadataID3MetadataKeyReleaseTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyReleaseTime)

A key that represents the time of the first release.

[`AVMetadataID3MetadataKeyReverb`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyReverb)

A key that represents the adjustments to echoes of different kinds.

[`AVMetadataID3MetadataKeySeek`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySeek)

A key that represents the location of other tags in a file or stream.

[`AVMetadataID3MetadataKeySetSubtitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySetSubtitle)

A key that represents the set subtitle the track belongs to.

[`AVMetadataID3MetadataKeySignature`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySignature)

A key that represents the group of frames to sign.

[`AVMetadataID3MetadataKeySize`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySize)

A key that represents the size of the audio file in bytes.

[`AVMetadataID3MetadataKeySubTitle`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySubTitle)

A key that represents the information relating to the contents title.

[`AVMetadataID3MetadataKeySynchronizedLyric`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySynchronizedLyric)

A key that represents the words in the audio file as text in sync with the audio.

[`AVMetadataID3MetadataKeySynchronizedTempoCodes`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeySynchronizedTempoCodes)

A key that represents the tempo codes used for a more accurate description of the tempo of a musical piece.

[`AVMetadataID3MetadataKeyTaggingTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTaggingTime)

A key that represents the time of tagging.

[`AVMetadataID3MetadataKeyTermsOfUse`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTermsOfUse)

A key that represents the brief description of the terms of use and ownership of the file.

[`AVMetadataID3MetadataKeyTime`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTime)

A key that represents the time for the recording.

[`AVMetadataID3MetadataKeyTitleDescription`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTitleDescription)

A key that represents the name of the piece.

[`AVMetadataID3MetadataKeyTitleSortOrder`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTitleSortOrder)

A key that represents the title sort order.

[`AVMetadataID3MetadataKeyTrackNumber`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyTrackNumber)

A key that represents the order number of the audio file.

[`AVMetadataID3MetadataKeyUniqueFileIdentifier`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUniqueFileIdentifier)

A key that represents the identifier used to indicate the audio file in a database.

[`AVMetadataID3MetadataKeyUnsynchronizedLyric`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUnsynchronizedLyric)

A key that represents the lyrics of the song or a text transcription of other vocal activities.

[`AVMetadataID3MetadataKeyUserText`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUserText)

A key that represents the user text information frame.

[`AVMetadataID3MetadataKeyUserURL`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyUserURL)

A key that represents the user webpage frame.

[`AVMetadataID3MetadataKeyYear`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyYear)

A key that represents the year of the recording.

[`AVMetadataID3MetadataKeyCommerical`](/documentation/AVFoundation/AVMetadataKey/id3MetadataKeyCommerical)

A key that represents the commerical frame.

### 3GP user metadata keys

[`AVMetadata3GPUserDataKeyAlbumAndTrack`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyAlbumAndTrack)

A key that represents the text for the album and track titles.

[`AVMetadata3GPUserDataKeyAuthor`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyAuthor)

A key that represents the author of the media.

[`AVMetadata3GPUserDataKeyCollection`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyCollection)

A key that represents the collection name for the media.

[`AVMetadata3GPUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyCopyright)

A key that represents the copyright statement.

[`AVMetadata3GPUserDataKeyDescription`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyDescription)

A key that represents the description for the media.

[`AVMetadata3GPUserDataKeyGenre`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyGenre)

A key that represents the genre of the media.

[`AVMetadata3GPUserDataKeyKeywordList`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyKeywordList)

A key that represents the list of keywords for the media.

[`AVMetadata3GPUserDataKeyLocation`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyLocation)

A key that represents the location information for the media.

[`AVMetadata3GPUserDataKeyMediaClassification`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyMediaClassification)

A key that represents the classification of the media content.

[`AVMetadata3GPUserDataKeyMediaRating`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyMediaRating)

A key that represents the rating of the media content.

[`AVMetadata3GPUserDataKeyPerformer`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyPerformer)

A key that represents information about the performer.

[`AVMetadata3GPUserDataKeyRecordingYear`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyRecordingYear)

A key that represents the recording year for the media.

[`AVMetadata3GPUserDataKeyThumbnail`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyThumbnail)

A key that represents the media thumbnail.

[`AVMetadata3GPUserDataKeyTitle`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyTitle)

A key that represents the title for the media.

[`AVMetadata3GPUserDataKeyUserRating`](/documentation/AVFoundation/AVMetadataKey/metadata3GPUserDataKeyUserRating)

A key that represents the user rating.

### ISO user metadata keys

[`AVMetadataISOUserDataKeyAccessibilityDescription`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyAccessibilityDescription)

A key that represents the accessibility description for the media content.

[`AVMetadataISOUserDataKeyCopyright`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyCopyright)

A key that represents the copyright statement.

[`AVMetadataISOUserDataKeyDate`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyDate)

A key that represents the date for the media content.

[`AVMetadataISOUserDataKeyTaggedCharacteristic`](/documentation/AVFoundation/AVMetadataKey/isoUserDataKeyTaggedCharacteristic)

A key that represents the tagged media characteristic used for identifying accessibility features.

### ICY metadata keys

[`AVMetadataIcyMetadataKeyStreamTitle`](/documentation/AVFoundation/AVMetadataKey/icyMetadataKeyStreamTitle)

A key that represents the title of a stream.

[`AVMetadataIcyMetadataKeyStreamURL`](/documentation/AVFoundation/AVMetadataKey/icyMetadataKeyStreamURL)

A key that represents the web address of a stream.

### Initializers

[`init(_:)`](/documentation/AVFoundation/AVMetadataKey/init(_:))

Creates a metadata key.

[`init(rawValue:)`](/documentation/AVFoundation/AVMetadataKey/init(rawValue:))

Creates a metadata key with the specified raw value.

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

---

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