title: QCamera get resolution and raw frame
body: <p>I would like to get the resolution of the selected camera and also get the raw frame in the videocapture but I have not found clearly at all how to do it. Could you help me!? Thanks in advance.</p>
  
  <pre><code>    // Open camera for reading
      cameraQt = new QCamera(cameras.at(cameraIdSelected));
      if(!cameraQt-&gt;isAvailable())
            ui-&gt;statusBar-&gt;showMessage(tr("Impossible to open camera...."));
  
      cameraQt-&gt;setViewfinder(ui-&gt;centralWidget);
  </code></pre>
  
  <p>like : <code>cameraQt-&gt;getResolution</code> ?</p>
  
  <p>Thanks.</p>