A value that defines the metadata identifiers for different file formats.
SDKs
- iOS 11.0+
- macOS 10.13+
- Mac Catalyst 13.0+
- tvOS 11.0+
- watchOS 6.0+
Framework
- AVFoundation
Declaration
typedef NSString *AVMetadataIdentifier;
A value that defines the metadata identifiers for different file formats.
SDKs
Framework
typedef NSString *AVMetadataIdentifier;
value
The value for the mutable metadata item.
locale
The locale for a mutable metadata item.
time
The timestamp for a mutable metadata item.
duration
The duration of a mutable metadata item.
extra Attributes
A dictionary containing the metadata item’s additional attributes.
AVMetadata Extra Attribute Key
A value that defines extra attribute keys.
data Type
The data type of the metadata item's value.
extended Language Tag
The IETF BCP 47 (RFC 4646) language identifier of the metadata item.
identifier
Indicates the identifier of the metadata item.
start Date
The start date of the timed metadata.