The background color of the composition.
- iOS 4.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
Only solid BGRA colors are supported; patterns and other supported colors are ignored. If the rendered pixel buffer does not have alpha, the alpha value of the background color is ignored.
If the background color is
NULL, the video compositor uses a default background color of opaque black.
Getting Composition Instruction Properties
An array of video composition layer instruction instances of that specify how video frames from source tracks should be layered and composed.
The time range during which the instruction is effective.
A Boolean value that indicates whether post processing is required for the video composition instruction.