Adds an output to the receiver.
- iOS 4.1+
- macOS 10.7+
- Mac Catalyst 13.0+
- tvOS 9.0+
The reader output to add.
Outputs are created with a reference to one or more
AVAsset objects. Adding an output to an asset reader indicates to the reader that it should source from those tracks. The tracks must be owned by the asset returned by the reader’s
You can't add an output after starting reading.