The minimum duration of the track’s frames.
- iOS 7.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
A track’s minimum frame duration is the reciprocal of its maximum frame rate. For instance, a video track with a maximum frame rate of 30 frames per second would have a minimum frame duration of 1/30 (or 0.033). The value of this property is
invalid if the track’s minimum frame duration is unknown or cannot be calculated.