videoitem.h Example File
multimedia/videographicsitem/videoitem.h

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 #ifndef VIDEOITEM_H
 #define VIDEOITEM_H

 #include <QtMultimedia/QAbstractVideoSurface>
 #include <QtGui/QGraphicsItem>

 class VideoItem
     : public QAbstractVideoSurface,
       public QGraphicsItem
 {
     Q_OBJECT
     Q_INTERFACES(QGraphicsItem)
 public:
     explicit VideoItem(QGraphicsItem *parentItem = 0);
     ~VideoItem();

     QRectF boundingRect() const;
     void paint(
         QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);

     //video surface
     QList<QVideoFrame::PixelFormat> supportedPixelFormats(
             QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const;

     bool start(const QVideoSurfaceFormat &format);
     void stop();
     bool present(const QVideoFrame &frame);

 private:
     QImage::Format imageFormat;
     QSize imageSize;

     QVideoFrame currentFrame;
     bool framePainted;
 };

 #endif