How to make a switched camera?

[big-harry]

Hi all, I'm moving from C++ and had some troubles porting some camera code. I'm trying to use addSwitchedCamera(String name) so I can set that as the camera on the DriverStation and just toggle through my USB cameras through setSource().

The examples for the Java versions show the VideoSink being initialised with an implicitly, but when I try to use it in Kotlin, I get Cannot access '<init>': it is protected in 'VideoSink'

Here is what I'm trying to do with Java:

UsbCamera Camera0;
UsbCamera Camera1;
VideoSink Server;

@Override
public void robotInit() {
    Camera0 = CameraServer.startAutomaticCapture(0);
    Camera1 = CameraServer.startAutomaticCapture(1);
    Server = CameraServer.addSwitchedCamera​("Switch");
    Server.setSource(Camera0);
}

Thanks in advanced.

[BrenekH]

This is the equivalent of the code you posted in Kotlin:

private lateinit var Camera0: UsbCamera
private lateinit var Camera1: UsbCamera
private lateinit var Server: VideoSink

override fun robotInit() {
    Camera0 = CameraServer.startAutomaticCapture(0)
    Camera1 = CameraServer.startAutomaticCapture(1)
    Server = CameraServer.addSwitchedCamera("Switch")
    Server.source = camera0
}

I couldn't tell you for certain why you were getting the error you posted without the code you tried, but I can tell you that it is raised if you try to instantiate the VideoSink class directly. This is because the constructor is marked as protected instead of public.

[big-harry]

That worked brilliantly, I was just trying to test example code.