openCV waitKey
#include <opencv2/opencv.hpp>
int main() {
cv::VideoCapture cap(0);
if (!cap.isOpened()) {
return -1;
}
while (true) {
cv::Mat frame;
cap >> frame;
if (frame.empty()) {
break;
}
cv::imshow("Video", frame);
int key = cv::waitKey(30);
if (key == 27) { // ASCII code for Esc key
break;
}
}
return 0;
}