The file length that the output of the session should not exceed.
- iOS 4.0+
- macOS 10.14+
- tvOS 9.0+
Depending on the content of the source asset, it is possible for the output to slightly exceed the file length limit. The length of the output file should be tested if you require that a strict limit be observed before making use of the output.
You can observe this property using Key-value observing.