title: Stream video with bitmap as overlay
body: <p>I'm new to wowza and is working on a project to live stream video captured from an Android device. I need to attach an image(dynamic one) to the video stream so that the users watching the stream can view it. The code I have tried is given below(as from the example source code from wowza):</p>
  
  <pre><code>        // Read in a PNG file from the app resources as a bitmap
          Bitmap overlayBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.overlay_logo);
  
          // Initialize a bitmap renderer with the bitmap
          mWZBitmap = new WZBitmap(overlayBitmap);
  
          // Place the bitmap at top left of the display
          mWZBitmap.setPosition(WZBitmap.LEFT, WZBitmap.TOP);
  
          // Scale the bitmap initially to 75% of the display surface width
          mWZBitmap.setScale(0.75f, WZBitmap.SURFACE_WIDTH);
  
          // Register the bitmap renderer with the GoCoder camera preview view as a frame listener
          mWZCameraView.registerFrameRenderer(mWZBitmap);
  </code></pre>
  
  <p>This works fine, but I don't want to show the image at the broadcasting end, the image should be visible only at the receiving end. Is there anyway to get this done?</p>