Phonon frame snapshot

Hello everybody,

I am able to capture a frame using grabWindow method

Code:

---

QPixmap bilde = QPixmap::grabWindow(videoPlayer->videoWidget()->winId());

---

How can I use built in phonon snapshot function, all I get is that picture size is 0x0 px.

Code:

---

QImage bilde;
 bilde = videoPlayer->videoWidget()->snapshot();
 
    qDebug()<<"Bildes izmers:" << bilde.size();
    if (bilde.size().isEmpty())
    {
	qDebug()<<"Mainigaja bilde, nav datu!";
    }
    else
    {
      bool saved = bilde.save("snap.jpg", "JPG", 100);
      qDebug() << "Vai saglabaja?" << saved;
    }

---

I want to try VideoWidget::snapshot, because my video feed is 1080x720px, but my videoPlayer widget is 720x480px and I want to capture full sized video frame, with grabWindow method I only can save picture with the same size as the widget.

Is there a method to capture full size video frame with grabWindow method?
Why VideoWidget::snapshot function isn't working?

I'm using kubuntu 11.04 with Qt 4.7.2

Best Regards
Raivis