这是一个用OpenCV2.4.10打开摄像头的一个例子，参见代码如下：

#include 
     
      #include 
      
       #include 
       
        using namespace cv;using namespace std;int main(int argc, char *argv[]){    CvCapture* cam0 = cvCaptureFromCAM(0);    if(!cam0)    {        fprintf(stderr, "Could not initialize opening of Camera 0..\n");        system("Pause");        return -1;    }    printf("cam0 initialized\n");    cvNamedWindow("Camera 0",CV_WINDOW_AUTOSIZE); //create a window called "Camera 0"    while (1)    {        IplImage *cam0Frame = cvQueryFrame(cam0);        if (cam0Frame) {            cvShowImage("Camera 0", cam0Frame);        }        if (cvWaitKey(30) == 27) //wait for 'Esc' key press for 30ms. If 'Esc' key is pressed, break loop        {            cout << "Esc key is pressed by user" << endl;            break;        }    }    cvReleaseCapture(&cam0);    cvDestroyWindow("Camera 0");    return 0;}
       
      
     

 

如果想同时打开两个摄像头，可以参见我之前的博客。