CMTime to seconds.
- iOS 4.0+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 6.0+
- Core Media
CMTimeto be converted.
The resulting Float64 number of seconds.
CMTime is invalid or indefinite, NaN is returned. If the
CMTime is infinite, +/- infinity is returned. If the
CMTime is numeric, epoch is ignored, and time.value / time.timescale is returned. The division is done in Float64, so the fraction is not lost in the returned result.