Use QPainter to draw on a videoStream

[thierry Joel]

I have a videoStream in a FrameLabel and i want to use QPainter to draw a rectangle on it, But when i do something like this:

void CameraView::paintEvent(QPaintEvent * /*event*/)
{
    QPainter painter(this);
    painter.setPen(Qt::blue);
    painter.drawRect(QRect( 500, 0, 150, 150));
}

void CameraView::paintEvent(QPaintEvent * /*event*/)
{
    QPainter painter(this);
    painter.setPen(Qt::blue);
    painter.drawRect(QRect( 500, 0, 150, 150));
}

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The rectangle is drawn behind the FrameLabel (i.e. behinde the videoStream)

I would be very grateful if anyone can show me an easy way to go around this.