opencv实现读取视频保存视频

#include <iostream> 
#include <assert.h> 
#include <opencv/cv.h> 
#include <opencv/highgui.h> 
#include <math.h> 
 
using namespace std; 
#ifdef NDEBUG 
#pragma comment(lib, "highgui210.lib") 
#pragma comment(lib, "cxcore210.lib") 
#pragma comment(lib, "ml210.lib") 
#pragma comment(lib, "cv210.lib") 
#else 
#pragma comment(lib, "highgui210d.lib") 
#pragma comment(lib, "cxcore210d.lib") 
#pragma comment(lib, "ml210d.lib") 
#pragma comment(lib, "cv210d.lib") 
#endif 
 
char g_fileName[] = "C:\\Users\\Desktop\\test.avi"; 
char g_winodwName[] = "Cv Test"; 
int main() 
{ 
 ::cvNamedWindow("g_winodwName", CV_WINDOW_AUTOSIZE); 
 CvCapture *pCvCapture = NULL; 
 pCvCapture = cvCreateFileCapture(g_fileName); 
 assert(NULL != pCvCapture); 
 IplImage *pIplFrame = NULL; 
 
 char out1[] = "C:\\Users\\Desktop\\out1.avi"; 
 double fps1 = cvGetCaptureProperty(pCvCapture, 
     CV_CAP_PROP_FPS); 
 
 CvSize size1 = cvSize((int)cvGetCaptureProperty(pCvCapture, 
       CV_CAP_PROP_FRAME_WIDTH), 
    (int)cvGetCaptureProperty(pCvCapture, 
       CV_CAP_PROP_FRAME_HEIGHT)); 
 
 
 CvVideoWriter *wrVideo1 = cvCreateVideoWriter(out1, 
       CV_FOURCC('X','V','I','D'), 
       10, 
       size1); 
 IplImage *gray1 = cvCreateImage(size1,8,1); 
 
 while (true) 
 { 
 pIplFrame = cvQueryFrame(pCvCapture); 
 if (NULL == pIplFrame) 
 { 
  break; 
 } 
 else 
 { 
  ::cvShowImage(g_winodwName, pIplFrame); 
  //保存视频文件 
  cvCvtColor(pIplFrame,gray1,CV_RGB2GRAY); 
  cvWriteFrame(wrVideo1,gray1); 
 
  if (27 == ::cvWaitKey(120)) 
  { 
  break; 
  } 
 } 
 } 
 
 
 ::cvReleaseImage(&pIplFrame); 
 ::cvDestroyWindow(g_winodwName); 
 ::cvReleaseImage(&gray1); 
 ::cvReleaseVideoWriter(&wrVideo1); 
 
 return cin.get(); 
}