Visual Studio抛出异常 - 简单的OpenCV程序

Question

由于我是OpenCV的新手，我尝试按照教程从网络摄像头捕获视频。我使用了以下代码：

#include "opencv2\opencv.hpp"
#include <stdint.h>

using namespace cv;
using namespace std;

int main(int argv, char** argc) {
    Mat frame;
    VideoCapture vid(0);    //0 if we only have one camera
    if (!vid.isOpened()) {  //check camera has been initialized
        cout << "ERROR: Cannot open the camera";
        return -1;
    }

    while (vid.read(frame)) {
        imshow("webcam", frame);
        if (waitKey(30) >= 0) break;
    }
    return 0;
}

当我运行程序时，会打开一个显示视频供稿的窗口，但它几乎立即关闭。我从Debug输出中得到了这个片段：

SETUP: Device is setup and ready to capture.

Event: Code: 0x0d Params: 0, 0
Event: Code: 0x0e Params: 0, 0
Exception thrown at 0x000007FEFCBAA06D in test.exe: Microsoft C++ exception: cv::Exception at memory location 0x000000000026EB10.

SETUP: Disconnecting device 0

我不知道我的代码有什么问题，甚至不知道如何开始调试。有什么建议？谢谢！