commonKeySource A key that represents the source information for the media. Declarationstatic let commonKeySource: AVMetadataKey See AlsoCommon metadata keyscommonKeyAccessibilityDescriptioncommonKeyAlbumNamecommonKeyArtistcommonKeyArtworkcommonKeyAuthorcommonKeyContributorcommonKeyCopyrightscommonKeyCreationDatecommonKeyCreatorcommonKeyDescriptioncommonKeyFormatcommonKeyIdentifiercommonKeyLanguagecommonKeyLastModifiedDatecommonKeyLocation