opencv实现定时录像功能

  #include "cv.h"  
  #include "cxcore.h"  
  #include "highgui.h"  
  #include <iostream>  
  #include <time.h> 
  #include <Windows.h> 
  #include <Mmsystem.h> 
  #include "stdio.h"  
  int timea=100000;  
  using namespace std;  
/*void times() 
{ 
  SYSTEMTIME sys_time; 
 
  //将变量值设置为本地时间 
  GetLocalTime( &sys_time ); 
 
  //输出时间 
  printf( "%4d/%02d/%02d %02d:%02d:%02d.%03d 星期%1d\n",sys_time.wYear, 
    sys_time.wMonth, 
    sys_time.wDay, 
    sys_time.wHour, 
    sys_time.wMinute, 
    sys_time.wSecond, 
    sys_time.wMilliseconds, 
    sys_time.wDayOfWeek); 
 
 // system("time"); 
  // 
 // system("pause"); 
  return 0; 
 
 
} */ 
  int main()  
  {  
    CvCapture* capture=cvCaptureFromCAM(0);  
    CvVideoWriter* video=NULL;  
    IplImage* frame=NULL;  
    int n;  
    if(!capture) //如果不能打开摄像头给出警告  
    {  
     cout<<"Can not open the camera."<<endl;  
     return -1;  
    }  
    else  
    {  
     frame=cvQueryFrame(capture); //首先取得摄像头中的一帧  
    int c=0; 
    SYSTEMTIME sys_time; 
 
  //将变量值设置为本地时间 
    GetLocalTime( &sys_time ); 
    char buf[1024]; 
    sprintf(buf,"camera-%4d-%2d-%02d-%02d-%02d-%02d.avi",sys_time.wYear,sys_time.wMonth,sys_time.wDay, 
    sys_time.wHour,sys_time.wMinute, sys_time.wSecond);  
 
      video=cvCreateVideoWriter(buf, CV_FOURCC('X', 'V', 'I', 'D'), 25,  
     cvSize(frame->width,frame->height)); //创建CvVideoWriter对象并分配空间  
  //保存的文件名为camera.avi，编码要在运行程序时选择，大小就是摄像头视频的大小，帧频率是32  
     if(video) //如果能创建CvVideoWriter对象则表明成功  
      {  
       cout<<"VideoWriter has created."<<endl;  
     }  
   cout<<"set the record time\n"<<endl;//设置录像时间 
   cin>>timea; 
   int ti=timea*25; 
    
    
     cvNamedWindow("Camera Video",1); //新建一个窗口  
      int i = 0;  
     while(i <= ti) // 让它循环ti次自动停止录取  
      {  
       frame=cvQueryFrame(capture); //从CvCapture中获得一帧  
       if(!frame)  
       {  
        cout<<"Can not get frame from the capture."<<endl;  
        break;  
       }  
       n=cvWriteFrame(video,frame); //判断是否写入成功，如果返回的是1，表示写入成功  
       // cout<<n<<endl;  
       cvShowImage("Camera Video",frame); //显示视频内容的图片  
       i++;  
       if(cvWaitKey(2)>0)   
        break; //有其他键盘响应，则退出  
     }  
    
     cvReleaseVideoWriter(&video); //如果不释放则春不上 
     cvReleaseCapture(&capture);  
     cvDestroyWindow("Camera Video");  
    }  
    return 0;  
  }