opacityRamp(at:)
Obtains the opacity ramp that includes a specified time.
Declaration
func opacityRamp(at time: CMTime) -> AVVideoCompositionLayerInstruction.OpacityRamp?See Also
Getting opacity, transform, and cropping ramps
cropRectangleRamp(at:)AVVideoCompositionLayerInstruction.CropRectangleRampgetCropRectangleRamp(for:startCropRectangle:endCropRectangle:timeRange:)AVVideoCompositionLayerInstruction.OpacityRampgetOpacityRamp(for:startOpacity:endOpacity:timeRange:)transformRamp(at:)AVVideoCompositionLayerInstruction.TransformRampgetTransformRamp(for:start:end:timeRange:)