.build();
PointerDetectorWindowMediaParam start = new PointerDetectorWindowMediaParam(
"start", 100, 100, 280, 380);
start.setImage("http://files.kurento.org/imgs/start.png");
pointerDetectorFilter.addWindow(start);
pointerDetectorFilter
.addWindowInListener(new MediaEventListener<WindowInEvent>() {
public void onEvent(WindowInEvent event) {
// Set overlay image
faceOverlayFilter.setOverlayedImage(
"http://files.kurento.org/imgs/mario-wings.png",