Obtaining IP Address For Camera From GRIP

Technical Java
#1

My team is currently working on streaming an image from GRIP on a kangaroo (baby PC) that will be located on the robot. The kangaroo has been set up to have a static IP address. We are able to create the grip program and run it on startup of the kangaroo, however i cannot for the life of me figure out where GRIP publishes its MJPG streams to. I have tried simply connecting to the port i got from the “GRIP SmartDashboard Extension” source file which i found (port 1180). However, when i attempt to connect to it in internet explorer and display the stream all i get is jibirish. (connecting to htttp://myKangarooIP:1180/. I’ve torn apart the smart dashboard extension a little bit and see that they use a Web Socket, but this is above my level of knowledge and i need to have this camera feed on my custom java dashboard before our first competition. Please Help! i’ll be forever in your debt.

#2

heres a snibbit of my OpenCV code that is attempting to open the stream

essentially what is happening is i am starting a camera feed and setting the ImageView object called “currentFrame” in JavaFX to the image i am getting from the camera. It works when i give it “0” as the camera ID. however i cannnot give it an IP it just throws my error saying “Cannot open camera stream.” implying that it cannot decode or find an image stream.

		// a timer for acquiring the video stream
		private ScheduledExecutorService timer;
		// the OpenCV object that realizes the video capture
		private VideoCapture capture = new VideoCapture();
		// a flag to change the button behavior
		private boolean cameraActive = false;
		// the id of the camera to be used
		private static int cameraId = 0;
		private static String cameraIP = "http://localhost:1181/?action=stream";
		public final int port = 1180;
		///?action=stream
		
	@FXML
	private void startCamera()
	{
		if (!this.cameraActive)
		{
			// start the video capture
			this.capture.open(cameraIP);
			
			// is the video stream available?
			if (this.capture.isOpened())
			{
				this.cameraActive = true;
				
				// grab a frame every 33 ms (30 frames/sec)
				Runnable frameGrabber = new Runnable() {
					
					@Override
					public void run()
					{
						// effectively grab and process a single frame
						Mat frame = grabFrame();
						// convert and show the frame
						Image imageToShow = Utils.mat2Image(frame);
						updateImageView(currentFrame, imageToShow);
					}
				};
				
				this.timer = Executors.newSingleThreadScheduledExecutor();
				this.timer.scheduleAtFixedRate(frameGrabber, 0, 33, TimeUnit.MILLISECONDS);
				
				// update the button content
				this.button.setText("Stop Camera");
			}
			else
			{
				// log the error
				System.err.println("Impossible to open the camera connection...");
			}
		}
		else
		{
			// the camera is not active at this point
			this.cameraActive = false;
			// update again the button content
			this.button.setText("Start Camera");
			
			// stop the timer
			this.stopAcquisition();
		}
	}
	private Mat grabFrame()
	{
		// init everything
		Mat frame = new Mat();
		
		// check if the capture is open
		if (this.capture.isOpened())
		{
			try
			{
				// read the current frame
				this.capture.read(frame);
				
				// if the frame is not empty, process it
				if (!frame.empty())
				{
					//Imgproc.cvtColor(frame, frame, Imgproc.COLOR_BGR2GRAY);
				}
				
			}
			catch (Exception e)
			{
				// log the error
				System.err.println("Exception during the image elaboration: " + e);
			}
		}
		
		return frame;
	}
	
	/**
	 * Stop the acquisition from the camera and release all the resources
	 */
	private void stopAcquisition()
	{
		if (this.timer!=null && !this.timer.isShutdown())
		{
			try
			{
				// stop the timer
				this.timer.shutdown();
				this.timer.awaitTermination(33, TimeUnit.MILLISECONDS);
			}
			catch (InterruptedException e)
			{
				// log any exception
				System.err.println("Exception in stopping the frame capture, trying to release the camera now... " + e);
			}
		}
		
		if (this.capture.isOpened())
		{
			// release the camera
			this.capture.release();
		}
	}
	
	/**
	 * Update the {@link ImageView} in the JavaFX main thread
	 * 
	 * @param view
	 *            the {@link ImageView} to update
	 * @param image
	 *            the {@link Image} to show
	 */
	private void updateImageView(ImageView view, Image image)
	{
		Utils.onFXThread(view.imageProperty(), image);
	}
	
	/**
	 * On application close, stop the acquisition from the camera
	 */
	protected void setClosed()
	{
		this.stopAcquisition();
	}

opening the camera IP in windows explorer results in a load of jibbirish and a crashed browser so there is something there just not what i want.

#3