Instance Property

requiredSourceTrackIDs

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

Declaration

var requiredSourceTrackIDs: [NSValue] { get }

See Also

Getting Composition Instruction Properties

var backgroundColor: CGColor?

The background color of the composition.

var layerInstructions: [AVVideoCompositionLayerInstruction]

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

var timeRange: CMTimeRange

The time range during which the instruction is effective.

var enablePostProcessing: Bool

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

var passthroughTrackID: CMPersistentTrackID

The track identifier from an instruction source frame.