如何使用 OpenCV 從 IP 攝影機擷取影格？

#include "cv.h"
#include "highgui.h"
#include <iostream>

int main(int, char**) {
    cv::VideoCapture vcap;
    cv::Mat image;

    const std::string videoStreamAddress = "rtsp://cam_address:554/live.sdp";  // RTSP stream

    // Open the video stream and check if it's open
    if (!vcap.open(videoStreamAddress)) {
        std::cout << "Error opening video stream or file" << std::endl;
        return -1;
    }

    // Create output window for displaying frames.
    cv::namedWindow("Output Window");

    for (;;) {
        if (!vcap.read(image)) {
            std::cout << "No frame" << std::endl;
            cv::waitKey();
        }
        cv::imshow("Output Window", image);
        if (cv::waitKey(1) >= 0) break;
    }

    return 0;
}