opacityRamp(at:)
Obtains the opacity ramp that includes a specified time.
Declaration
func opacityRamp(at time: CMTime) -> AVVideoCompositionLayerInstruction.OpacityRamp?Obtains the opacity ramp that includes a specified time.
func opacityRamp(at time: CMTime) -> AVVideoCompositionLayerInstruction.OpacityRamp?