视频存图像 计时

int _tmain(int argc, _TCHAR* argv[])

{

CvCapture *capture=cvCaptureFromFile("未命名_0.mp4");

IplImage* frame=cvQueryFrame(capture);

if (!frame)

{

cout<<"can not find video"<<endl;

return -1;

}

//CTimeDiffer   tif;

//tif.StartTiming();

//double span = tif.GetElapseTime();

long begin,end,time;

IplImage* gray=cvCreateImage(cvGetSize(frame),8,1);

char filename[100];

int fnum=0;

cvNamedWindow("gray");

while (frame)

{

fnum++;

begin = clock();

sprintf(filename,"image\\result %d.jpg",fnum);

cvCvtColor(frame,gray,CV_RGB2GRAY);

cvShowImage("gray",gray);

cvSaveImage(filename,gray);

end = clock();

time = end - begin;

cout<<time<<endl;

if (cvWaitKey(1)>=0)

{

break;

}

frame=cvQueryFrame(capture);

}

return 0;

}