Adds a capture input to the session without forming any connections.
- iOS 8.0+
- macOS 10.7+
- Mac Catalyst 13.0+
The capture input to add to the session.
You can invoke this method while the session is running.
Typically you should use
add to add an input to a session. You use this method if you need fine-grained control over which inputs are connected to which outputs.