AVMetadataExtraAttributeKey A structure that defines keys for extra metadata attributes. Declarationstruct AVMetadataExtraAttributeKey TopicsExtra attribute keysvalueURIbaseURIinfoInitializersinit(_:)init(rawValue:) RelationshipsConforms ToEquatableHashableRawRepresentableSendableSendableMetatype See AlsoMetadataRetrieving media metadataAVMetadataItemAVMutableMetadataItemAVMetadataIdentifierAVMetadataKeyAVMetadataKeySpaceAVMetadataFormatAVMetadataItemFilter