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How do I display two or more videos with different lenghts (1,2 mins) using opencv?

How do I display two or more videos with different lenghts (1,2 mins) using opencv?

/* Open the Video File for Reading */
VideoCapture cap("CarSurveillance/Video1.avi"); // 00:00:33
VideoCapture cap2("CarSurveillance/Video2.mp4"); // 00:01:12

if (!cap.isOpened()){
    cout << "Was not possible to Open the Video" << endl;
    cout << "Reasons:" << endl;
    cout << "1st: Wrong PATH" << endl;
    cout << "2nd: Wrong Extension" << endl;
    cout << "3rt: Unknown Reasons" << endl;
    system("PAUSE");
    exit(EXIT_FAILURE);
}
if (!cap2.isOpened()){
    cout << "Was not possible to Open the Video" << endl;
    cout << "Reasons:" << endl;
    cout << "1st: Wrong PATH" << endl;
    cout << "2nd: Wrong Extension" << endl;
    cout << "3rt: Unknown Reasons" << endl;
    system("PAUSE");
    exit(EXIT_FAILURE);
}
namedWindow("Video1", CV_WINDOW_AUTOSIZE); 
namedWindow("Video2", CV_WINDOW_AUTOSIZE);
double fps = cap.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Video 1 Frame per seconds : " << fps << endl;
fps = cap2.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Video 2 Frame per seconds : " << fps << endl;

while (true){
    Mat frame,frame2;
    if(!cap.read(frame)){
        destroyWindow("Video1");
    }else{
        imshow("Video1", frame);
    }

    if (!cap2.read(frame2)){
        destroyWindow("Video2");
    }else{
        imshow("Video2", frame2);
    }
    waitKey(30);
}
system("PAUSE");
return 0;

How do I display two or more videos with different lenghts (1,2 mins) using opencv?

int main(){

/* Open the Video File for Reading */
VideoCapture cap("CarSurveillance/Video1.avi"); // 00:00:33
VideoCapture cap2("CarSurveillance/Video2.mp4"); // 00:01:12

if (!cap.isOpened()){
    cout << "Was not possible to Open the Video" << endl;
    cout << "Reasons:" << endl;
    cout << "1st: Wrong PATH" << endl;
    cout << "2nd: Wrong Extension" << endl;
    cout << "3rt: Unknown Reasons" << endl;
    system("PAUSE");
    exit(EXIT_FAILURE);
}
if (!cap2.isOpened()){
    cout << "Was not possible to Open the Video" << endl;
    cout << "Reasons:" << endl;
    cout << "1st: Wrong PATH" << endl;
    cout << "2nd: Wrong Extension" << endl;
    cout << "3rt: Unknown Reasons" << endl;
    system("PAUSE");
    exit(EXIT_FAILURE);
}
namedWindow("Video1", CV_WINDOW_AUTOSIZE); 
bool video1WindowDestroyed = false;
bool video2WindowDestroyed = false;
namedWindow("Video2", CV_WINDOW_AUTOSIZE);
double fps = cap.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Video 1 Frame per seconds : " << fps << endl;
fps = cap2.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Video 2 Frame per seconds : " << fps << endl;
Mat frame, frame2;
cap.read(frame); // read a new frame from video
cap2.read(frame); // read a new frame from video

while (true){
    Mat frame,frame2;
    if(!cap.read(frame)){
        destroyWindow("Video1");
    }else{

    if ((video1WindowDestroyed == false) && (cap.read(frame) == true)){
        imshow("Video1", frame);
    }

    if (!cap2.read(frame2)){
        destroyWindow("Video2");
    }else{
    if (cap.read(frame) == false){
            destroyWindow("Video1");
            video1WindowDestroyed = true;
        }
    }
    if ((video2WindowDestroyed == false) && (cap2.read(frame2) == true)){
        imshow("Video2", frame2);
        if (cap2.read(frame2) == false){
            destroyWindow("Video2");
            video2WindowDestroyed = true;
        }
    }

    if (video2WindowDestroyed == true && video2WindowDestroyed == true){
        break;
    }
    waitKey(30);
}
waitKey(0);
system("PAUSE");
return 0;

}

After the when first video be closed ends he is slow to close the window and pause the second stay in slow motionvideo, two seconds after restart