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(); }