OpenCV video write to disk. (VideoCapture.read() method is not somehow working so using CvCapture)

opencvVideoWrite.cpp

#include <iostream>
#include <opencv2/highgui/highgui.hpp>

using namespace std;
using namespace cv;

int main(int argc, char* argv[])
{
    CvCapture *camCapture;
    
    string filePath = "/Users/saikat/Desktop/MyVideo.avi";
    
    if (!(camCapture = cvCaptureFromCAM(CV_CAP_ANY))) {
        cout << "Failed to capture from camera" << endl;
        return -1;
    }
    
    cout << "Camera opened successfully" << endl;
    
    double width = cvGetCaptureProperty(camCapture, CV_CAP_PROP_FRAME_WIDTH);
    double height = cvGetCaptureProperty(camCapture, CV_CAP_PROP_FRAME_HEIGHT);
    
    cout << "Frame Size = " << width << "x" << height << endl;
    
    Size frameSize(static_cast<int>(width), static_cast<int>(height));
    VideoWriter videoWriter (filePath, CV_FOURCC('M','I','V','3'), 20, frameSize, true); //initialize the VideoWriter object
    
    if( !videoWriter.isOpened() ){
        cout << "Error: Writing failed" << endl;
        return -1;
    }
    
    namedWindow("MyVideo", CV_WINDOW_AUTOSIZE);
    
    IplImage *cameraFrame;
    
    while (true) {
        Mat frame;
        
        if ((cameraFrame = cvQueryFrame(camCapture))) {
            Mat frame(cameraFrame);
            
            videoWriter.write(frame);
            
            imshow("MyVideo", frame); //show the frame in "MyVideo" window
        }
        
        if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
        {
            cout << "esc key is pressed by user" << endl;
            break;
        }
        
    }
    
    cout << "Done" << endl;
    
    cvReleaseCapture(&camCapture);
    
    return 0;
}