The time scale for movies that contain the
- iOS 13.0+
- macOS 10.11+
- Mac Catalyst 13.0+
- watchOS 6.0+
The default movie time scale is
600. In certain cases, you may want to set this to a different value. For example, a movie that contains a single audio track should set the movie time scale to the media time scale of that track. Set this property on a new empty movie before any edits are performed on the movie.