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videowidgetsurface.h Example File
multimedia/videowidget/videowidgetsurface.h

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 #ifndef VIDEOWIDGETSURFACE_H
 #define VIDEOWIDGETSURFACE_H

 #include <QtCore/QRect>
 #include <QtGui/QImage>
 #include <QtMultimedia/QAbstractVideoSurface>
 #include <QtMultimedia/QVideoFrame>

 class VideoWidgetSurface : public QAbstractVideoSurface
 {
     Q_OBJECT
 public:
     VideoWidgetSurface(QWidget *widget, QObject *parent = 0);

     QList<QVideoFrame::PixelFormat> supportedPixelFormats(
             QAbstractVideoBuffer::HandleType handleType = QAbstractVideoBuffer::NoHandle) const;
     bool isFormatSupported(const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const;

     bool start(const QVideoSurfaceFormat &format);
     void stop();

     bool present(const QVideoFrame &frame);

     QRect videoRect() const { return targetRect; }
     void updateVideoRect();

     void paint(QPainter *painter);

 private:
     QWidget *widget;
     QImage::Format imageFormat;
     QRect targetRect;
     QSize imageSize;
     QRect sourceRect;
     QVideoFrame currentFrame;
 };

 #endif