#include "opencv2/opencv.hpp"
#include "opencv2/videoio.hpp"
#include "opencv2/highgui.hpp"

const int FPS = 30;


bool isDiscardData = true;
int countDiscard = 0;
const int DISCARD_DURATION = 10;

int main() {
  cv::VideoCapture cap;
  cap.open(0);

  if (!cap.isOpened()) {
    std::cerr << "[ERROR] Unable to open camera!" << std::endl;
    return -2;
  }

  while (true) {
    if(isDiscardData){
       countDiscard++;
       if(countDiscard == DISCARD_DURATION*FPS)
           isDiscardData = false;
       }
    else{
       cv::Mat frame;
       cap.read(frame);
       if (frame.empty()) {
          std::cerr << "[ERROR] blank frame grabbed" << std::endl;
          break;
       }
       cv::imshow("Color", frame);
       if (cv::waitKey(1000.0 / FPS) >= 0)
           break;
       }
    }
    return 0;
}