通过OPENCV从视频中获取图片并保存

//#include "stdafx.h"
#include "Afxdlgs.h"
#include "highgui.h"
#include "stdio.h"
#include "cv.h"
#include "cxcore.h" 
#include "math.h"
#include "stdlib.h"
#include "time.h" 
#include "cderr.h"
#include "cstringt.h"

//#include "opencv2/opencv.hpp"
//#include "time.h" 

//extern CString * selectfile();
//#pragma comment( linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"" )
int main( int argc, char** argv )
{
  /*
 CString *arr=NULL;

 arr = selectfile();
   printf("%s",arr[0]);
 delete [] arr;
 */ 

CString path = "E:\\导出图片\\";       //存放导出图片位置
  char filename[50];
  CString file;
     int bknum=10000; //起始帧的位置，可以更改
  CvCapture* capture = 0;
  int save;
  capture = cvCrea