Display the camera frame in real time

[alex_lue]

Here is my code:

QImage camImage;
........
.......
// Loop ...
while(camSwitch != false)
{
         // Wait 5000 MillSeconds for a frame
         if(Ret == FCE_NOERROR)
            Ret = FGGetFrame(hCamera, &Frame, 5000);
 
         if(Ret == FCE_NOERROR)
            Ret = FGPutFrame(hCamera, &Frame);
 
         cvNamedWindow("1", CV_WINDOW_AUTOSIZE);
 
         camImage = QImage::QImage(Frame.pData, 640, 480, QImage::Format_Indexed8);
         camImage.setColorTable(grayscales);
 
         Display->scene()->setBackgroundBrush(QBrush::QBrush(camImage)); 
         Display->fitInView(0,0,640,480);
         cvWaitKey(50);		
}

QImage camImage;
........
.......
// Loop ...
while(camSwitch != false)
{
         // Wait 5000 MillSeconds for a frame
         if(Ret == FCE_NOERROR)
            Ret = FGGetFrame(hCamera, &Frame, 5000);

         if(Ret == FCE_NOERROR)
            Ret = FGPutFrame(hCamera, &Frame);
         
         cvNamedWindow("1", CV_WINDOW_AUTOSIZE);
	                  
         camImage = QImage::QImage(Frame.pData, 640, 480, QImage::Format_Indexed8);
         camImage.setColorTable(grayscales);
           
         Display->scene()->setBackgroundBrush(QBrush::QBrush(camImage)); 
         Display->fitInView(0,0,640,480);
         cvWaitKey(50);		
}

To copy to clipboard, switch view to plain text mode 

Frame.pData is the real time frame with type unsigned char *
Line 14 & 21 are 2 functions of OpenCv(I hope you know that.) Line 14 made a new window. And line 21 ist a wait function. When i don't use these 2 functions, the program run to crash. This is comic.
Display is the object of QGraphicsview. Although i have set up the size of Display in 640*480 in QtDesigner, but wenn i don't use fitInView(0,0,640,480), the frame is not displayed automatically. So i have to use fitInView.
Have i too many error?

Thanks!