Video rendering problem with phonon and QGraphicsScene

[nigeroid]

Hello. The following code
@ QApplication a(argc, argv);
Phonon::MediaObject *media = new Phonon::MediaObject();
Phonon::VideoWidget *video = new Phonon::VideoWidget(NULL);
video->setGeometry(0, 0, 200, 200);
Phonon::createPath(media, video);
Phonon::MediaSource source("1.avi");
media->setCurrentSource(source);
media->play();
video->show();
return a.exec();
@

shows me a video. its ok.
But this:
@ QApplication a(argc, argv);
QGraphicsScene scene;
Phonon::MediaObject *media = new Phonon::MediaObject();
Phonon::VideoWidget *video = new Phonon::VideoWidget(NULL);
video->setGeometry(0, 0, 200, 200);
Phonon::createPath(media, video);
Phonon::MediaSource source("1.avi");
media->setCurrentSource(source);
media->play();
QGraphicsProxyWidget * pWidget = scene.addWidget(video,Qt::Widget);
qDebug() << pWidget->size() << pWidget->widget()->size();
qDebug() << pWidget->pos() << pWidget->widget()->pos();
qDebug() << pWidget->isVisible() << pWidget->widget()->isVisible();
QGraphicsView view(&scene);
view.show();
return a.exec();
@

shows me a widget with white background..and nothing else.. but where is my video ? ;) If i connect audiooutput to media, i hear sound of movie, so stream is going on.
dump:

@
QSizeF(200, 200) QSize(200, 200)
QPointF(0, 0) QPoint(0,0)
true true
@

Tried with Qt 4.7, Qt 4.8.1.
My task is to draw some widgets over video in full screen mode, such as playback buttons, seeker and volume slider. If i can do that by another way then using QGraphicsScene tell me please :)