opencv调用摄像头录制视频

1.安装opencv1.0和vc6.0并配置好，vc6下配置opencv1.0教程http://wiki.opencv.org.cn/index.php/VC6%E4%B8%8B%E5%AE%89%E8%A3%85%E4%B8%8E%E9%85%8D%E7%BD%AEOpenCV1.0

2.安装XVID编解码器，下载地址http://download.csdn.net/detail/whzhaochao/6551035

3.代码

#include "cv.h"
#include "cxcore.h"
#include "highgui.h"
#include <iostream>

using namespace std;
int main()
{
   CvCapture* capture=cvCaptureFromCAM(-1);
   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
      video=cvCreateVideoWriter("camera.avi", 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;
      }

      cvNamedWindow("Camera Video",1); //新建一个窗口
      int i = 0;
      while(1) 
      {
         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);
      cvReleaseCapture(&capture);
      cvDestroyWindow("Camera Video");
   }
   return 0;
}