---
title: Media Object Attribute Keys
framework: medialibrary
role: collectionGroup
role_heading: API Collection
path: medialibrary/media-object-attribute-keys
---

# Media Object Attribute Keys

Attribute keys for a media object. These constants are used to specify keys within a media object’s attributes dictionary.

## Topics

### Constants

- [MLMediaObjectDurationKey](medialibrary/mlmediaobjectdurationkey.md)
- [MLMediaObjectArtistKey](medialibrary/mlmediaobjectartistkey.md)
- [MLMediaObjectAlbumKey](medialibrary/mlmediaobjectalbumkey.md)
- [MLMediaObjectGenreKey](medialibrary/mlmediaobjectgenrekey.md)
- [MLMediaObjectKindKey](medialibrary/mlmediaobjectkindkey.md)
- [MLMediaObjectTrackNumberKey](medialibrary/mlmediaobjecttracknumberkey.md)
- [MLMediaObjectBitRateKey](medialibrary/mlmediaobjectbitratekey.md)
- [MLMediaObjectSampleRateKey](medialibrary/mlmediaobjectsampleratekey.md)
- [MLMediaObjectChannelCountKey](medialibrary/mlmediaobjectchannelcountkey.md)
- [MLMediaObjectResolutionStringKey](medialibrary/mlmediaobjectresolutionstringkey.md)
- [MLMediaObjectCommentsKey](medialibrary/mlmediaobjectcommentskey.md)
- [MLMediaObjectKeywordsKey](medialibrary/mlmediaobjectkeywordskey.md)
- [MLMediaObjectProtectedKey](medialibrary/mlmediaobjectprotectedkey.md)

## See Also

### Constants

- [Aperture Media Group Type Identifiers](medialibrary/aperture-media-group-type-identifiers.md)
- [Final Cut Pro Media Group Type Identifiers](medialibrary/final-cut-pro-media-group-type-identifiers.md)
- [Folders Media Group Type Identifiers](medialibrary/folders-media-group-type-identifiers.md)
- [GarageBand Media Group Type Identifiers](medialibrary/garageband-media-group-type-identifiers.md)
- [Logic Media Group Type Identifiers](medialibrary/logic-media-group-type-identifiers.md)
- [MLMediaLoadAppFoldersKey](medialibrary/mlmedialoadappfolderskey.md)
- [MLMediaLoadAppleLoops](medialibrary/mlmedialoadappleloops.md)
- [MLMediaLoadExcludeSourcesKey](medialibrary/mlmedialoadexcludesourceskey.md)
- [MLMediaLoadFoldersKey](medialibrary/mlmedialoadfolderskey.md)
- [MLMediaLoadIncludeSourcesKey](medialibrary/mlmedialoadincludesourceskey.md)
- [MLMediaLoadMoviesFolder](medialibrary/mlmedialoadmoviesfolder.md)
- [MLMediaLoadSourceTypesKey](medialibrary/mlmedialoadsourcetypeskey.md)
- [MLMediaSourceApertureIdentifier](medialibrary/mlmediasourceapertureidentifier.md)
- [MLMediaSourceAppDefinedFoldersIdentifier](medialibrary/mlmediasourceappdefinedfoldersidentifier.md)
- [MLMediaSourceCustomFoldersIdentifier](medialibrary/mlmediasourcecustomfoldersidentifier.md)