opencv播放视频

#include "stdafx.h"
#include <cv.h>
#include <highgui.h>

int g_slider_position = 0;
CvCapture* g_capture = NULL;

void onTrackbarSlide(int pos)//滚动条
{
	cvSetCaptureProperty(
		g_capture,
		CV_CAP_PROP_POS_FRAMES,
		pos
		);
}

int _tmain(int argc, _TCHAR* argv[])
{
	if(argc <1)
		return -1;
	cvNamedWindow("CQ",CV_WINDOW_AUTOSIZE);//创建窗口，大小自动适应
	CvCapture* capture = cvCreateFileCapture("SHE.avi");//打开视频资源
	IplImage* frame;
	while (1)
	{
		frame = cvQueryFrame(capture);//读取出一帧数据
		if(!frame)
			break;
		cvShowImage("CQ",frame);//显示窗口
		cvCreateTrackbar("播放进度","CQ",&n,frames,onTrackbarSlide);

		char c = cvWaitKey(10);
		if(27 == c)
			break;
	}
	cvReleaseCapture(&capture);
	cvDestroyWindow("CQ");
	return 0;
}