使用开源库（OpenCV）实现视频的倒播

直接上代码：

#include "opencv2/core/utility.hpp"
#include "opencv2/core/ocl.hpp"
#include "opencv2/video/tracking.hpp"
#include "opencv2/imgproc.hpp"
#include "opencv2/videoio.hpp"
#include "opencv2/highgui.hpp"

#include 
#include 

using namespace cv;

int main(int argc, char* argv[])
{
	CvCapture* cap = cvCreateFileCapture("E:\\mycode\\LiveCompile\\x64\\Release\\Titanic.mkv");

	cvNamedWindow("image", 1);
	int nCount = cvGetCaptureProperty(cap, CV_CAP_PROP_FRAME_COUNT);
	int staticCount = nCount;
	IplImage *pImg;
	while (1)
	{
		cvSetCaptureProperty(cap, CV_CAP_PROP_POS_FRAMES, nCount--);//指定当前帧的位置，每次都是上一帧
		pImg = cvQueryFrame(cap);

		cvShowImage("image", pImg);
		cv::waitKey(1000/25);
		if (nCount == 0)
			nCount = staticCount;
	}

	return 0;
}

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