在程序中使用mac camera的示例代码？

import cv2

cap = cv2.VideoCapture(0)

while True:
    ret, frame = cap.read()
    cv2.imshow('frame', frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

navigator.mediaDevices.getUserMedia({ video: true })
  .then(function(stream) {
    var video = document.querySelector('video');
    video.srcObject = stream;
  })
  .catch(function(err) {
    console.log("An error occurred: " + err);
  });

import org.opencv.core.Core;
import org.opencv.core.Mat;
import org.opencv.videoio.VideoCapture;
import org.opencv.videoio.Videoio;

public class Main {
    public static void main(String[] args) {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        VideoCapture capture = new VideoCapture(0);
        if (capture.isOpened()) {
            Mat frame = new Mat();
            while (true) {
                capture.read(frame);
                // Do something with the frame
            }
        }
        capture.release();
    }
}

#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>

int main(int argc, char** argv) {
    cv::VideoCapture capture(0);
    if (capture.isOpened()) {
        cv::Mat frame;
        while (true) {
            capture >> frame;
            // Do something with the frame
        }
    }
    capture.release();
    return 0;
}