Specifies whether processing should occur during or before playback.
- iOS 11+
- macOS 10.12+
- Mac Catalyst 13.0+
- tvOS 11+
The value for this key is an NSNumber object with a Boolean value. With the default value of
NO, Photos always renders your edits immediately when you call the
init method, calling your
frame block for each frame in the Live Photo’s video and still photo content.
When you specify a value of
YES, Photos can defer rendering until playback time, calling your
frame block only for photo and video frames that need to be displayed. However, in this case Photos may still choose to pre-render your edits if needed.
This option does not apply when rendering for output with the