OpenCV - 在 OSX 中无法捕获相机

Question

为什么在 OSX 中我的代码根本没有显示任何相机捕捉？

#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
using namespace cv;
using namespace std;

int main() {
  VideoCapture stream1(0);   //0 or 1 or 2 same..

  if (!stream1.isOpened()) {
    cout << "cannot open camera";
  }


  while (true) {
    Mat cameraFrame;
    stream1.read(cameraFrame);
    imshow("cam", cameraFrame);
    if (waitKey(30) >= 0)
      break;
  }
  return 0;
}

Answer 1

[已解决]问题已通过替换值解决

VideoCapture stream1(2);