Adds an asset writer input group instance to the asset writer.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
The asset writer input group to be added.
The asset writer will mark the tracks associated with grouped inputs as mutually exclusive to each other for playback or other processing, if the output container format supports mutually exclusive relationships among tracks.
When an input group is added to an asset writer, the value of
marks for the
AVAsset instance set as the default input will automatically be set to
true and all other inputs in the group will be set to
Input groups cannot be added after writing has started.