OpenCV打开摄像头 保存视频…

原文地址：OpenCV打开摄像头 保存视频文件作者：飞翔#include "cv.h"
#include "highgui.h"
#include "iostream.h"
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",-1,32,

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
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
if(cvWaitKey(2)>0) break; //有其他键盘响应，则退出
}
cvReleaseVideoWriter(&video);
cvReleaseCapture(&capture);
cvDestroyWindow("Camera Video");
}
return 0;