Instance Property

requiredSourceTrackIDs

An array of track identifiers required to compose frames for the instruction.

Declaration

@property(nonatomic, readonly) NSArray<NSValue *> *requiredSourceTrackIDs;

See Also

Getting Composition Instruction Properties

backgroundColor

The background color of the composition.

layerInstructions

An array of video composition layer instruction instances of that specify how video frames from source tracks should be layered and composed.

timeRange

The time range during which the instruction is effective.

enablePostProcessing

A Boolean value that indicates whether post processing is required for the video composition instruction.

passthroughTrackID

The track identifier from an instruction source frame.