#ifdef _OPENCV21
#include <cv.h>
#include <highgui.h>
#else

#include <opencv2/core/core_c.h>
#include <opencv2/imgproc/imgproc_c.h>
#include <opencv2/highgui/highgui_c.h>
#endif

#include <stdio.h>

int main(int argc, char* argv[])
{


	IplImage  *frame;
	CvCapture *capture;
	CvSize  size;

	capture = cvCaptureFromCAM(0);

	cvSetCaptureProperty(capture,CV_CAP_PROP_FPS, 15);  
	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH,640);
	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT,480 );
    frame = cvQueryFrame(capture);
    cvShowImage("correct frame 640*480",frame);
	size = cvGetSize(frame);
	printf("width: %d, height: %d\n", size.width, size.height);

	cvSetCaptureProperty(capture,CV_CAP_PROP_FPS, 15);  
	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH,320);
	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT,240 );
    frame = cvQueryFrame(capture);
    cvShowImage("correct frame 320*240",frame);
	size = cvGetSize(frame);
	printf("width: %d, height: %d\n", size.width, size.height);

	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_WIDTH,320);
	cvSetCaptureProperty(capture,CV_CAP_PROP_FRAME_HEIGHT,240 );
 	cvSetCaptureProperty(capture,CV_CAP_PROP_FPS, 15);  
    frame = cvQueryFrame(capture);
	size = cvGetSize(frame);
	printf("width: %d, height: %d\n", size.width, size.height);

	cvShowImage("fault: frame 640*480",frame);
    cvWaitKey(0);

    cvReleaseCapture(&capture);
}