title: Change Frame Size on OpenCV JavaCameraView
body: <p>I'm creating an application on Android that is using OpenCV's JavaCameraView. I'm trying to change the returned frame size but changing the frame still returns frames at 320X240. </p>
  
  <pre><code>@Override
  public void onCameraViewStarted(int width, int height) {
      mRgba = new Mat(480, 640, CvType.CV_8UC4);
      mGray = new Mat(480, 640, CvType.CV_8UC4);
  }
  
  
  @Override
  public Mat onCameraFrame(Mat inputFrame) {
      inputFrame.copyTo(mRgba);
  
      Imgproc.cvtColor(mRgba, mGray, Imgproc.COLOR_RGBA2GRAY);
  
      // Processing
  
      return mRgba;
  }
  </code></pre>
  
  <p>Any help on how to change the returned frame size would be greatly appreciated!</p>