The metadata written to the output file by the export session.
- iOS 4.0+
- macOS 10.7+
- UIKit for Mac 13.0+Beta
- tvOS 9.0+
The metadata is an array of
If the value of this key is
nil, any existing metadata in the exported asset will be translated as accurately as possible into the appropriate metadata key space for the output file and written to the output.
You can observe this property using Key-value observing.
The URL of the export session’s output.
The file length that the output of the session should not exceed.
The time range exported from the source.
Specifies a filter object used during export to determine which metadata items to transfer from the source asset.
The parameters for audio mixing and an indication whether to enable nondefault audio mixing for export.
The instructions for video composition, and indicates whether video composition is enabled for export.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.Learn more about using Apple's beta software