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Unread 07-02-2017, 21:33
thecoopster20 thecoopster20 is offline
4th Year Programmer - Java
FRC #3602 (Robomos)
Team Role: Programmer
 
Join Date: Mar 2016
Rookie Year: 2014
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Posts: 27
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Re: More Than Two USB Cameras??

I highly recommend using something along these lines to make sure that you are only ever streaming the camera you want, instead of wasting bandwidth by streaming multiple cameras at the same time.

Code:
public void robotInit() {
    	
    	Thread t = new Thread(() -> {
    		
    		boolean allowCam1 = false;
    		
    		UsbCamera camera1 = CameraServer.getInstance().startAutomaticCapture(0);
            camera1.setResolution(320, 240);
            camera1.setFPS(30);
            UsbCamera camera2 = CameraServer.getInstance().startAutomaticCapture(1);
            camera2.setResolution(320, 240);
            camera2.setFPS(30);
            
            CvSink cvSink1 = CameraServer.getInstance().getVideo(camera1);
            CvSink cvSink2 = CameraServer.getInstance().getVideo(camera2);
            CvSource outputStream = CameraServer.getInstance().putVideo("Switcher", 320, 240);
            
            Mat image = new Mat();
            
            while(!Thread.interrupted()) {
            	
            	if(oi.getGamepad().getRawButton(9)) {
            		allowCam1 = !allowCam1;
            	}
            	
                if(allowCam1){
                  cvSink2.setEnabled(false);
                  cvSink1.setEnabled(true);
                  cvSink1.grabFrame(image);
                } else{
                  cvSink1.setEnabled(false);
                  cvSink2.setEnabled(true);
                  cvSink2.grabFrame(image);     
                }
                
                outputStream.putFrame(image);
            }
            
        });
        t.start();
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