OpenCV camera example

#include <opencv/cv.h>
#include <opencv/highgui.h>
#include <iostream>

int main(int, char**)
{

  cv::VideoCapture cap(0); // open the default camera

  if(!cap.isOpened())  { // check if we succeeded
    std::cout << "Camera not open!\n";
    return -1;
  }

  cv::namedWindow("Camera",1);
  cv::Mat frame;

  while (true) {

    cap >> frame; // get a new frame from camera
    cv::imshow("Camera", frame);
    if(cv::waitKey(30) >= 0) break;

  }

  return 0;
}