Returns whether the receiver’s track is enabled.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
For file types that support enabled and disabled tracks, such as QuickTime Movie files, specifies whether to enable the track corresponding to the receiver by default for playback and processing.
The default value is
Configuring a Writer Input
The collection of track-level metadata to associate with the asset and for carriage in the output file.
The transform specified in the output file as the preferred transformation of the visual media data for display purposes.
A Boolean value that indicates whether the input should tailor its processing of media data for real-time sources.
Size specified in the output file as the natural dimensions of the visual media data for display.