Opencv: Cannot load new frame while detecting Hough lines - c++

Question

I'm trying to detect Hough Lines in video captured by cam. The problem is that to load a new frame, I have to close current window and after that, a new window with a new frame is opened automatically. I just want to get rid of closing windows to load new frames. How can I play the video in single window without closing it?
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main()
{
VideoCapture stream(0);
if(!stream.isOpened()){
cout << "\nCannot open video camera";
} else {
//CAPTURING FRAMES FROM CAMERA
while( true ){
Mat src;
stream.read(src);
//Mat src = imread("D:/LineDetection.png", 0);
Mat dst, cdst;
Canny(src, dst, 50, 200, 3);
cvtColor(dst, cdst, CV_GRAY2BGR);
vector<Vec2f> lines;
// detect lines
HoughLines(dst, lines, 1, CV_PI/180, 150, 0, 0 );
// draw lines
for( size_t i = 0; i < lines.size(); i++ )
{
float rho = lines[i][0], theta = lines[i][1];
Point pt1, pt2;
double a = cos(theta), b = sin(theta);
double x0 = a*rho, y0 = b*rho;
pt1.x = cvRound(x0 + 1000*(-b));
pt1.y = cvRound(y0 + 1000*(a));
pt2.x = cvRound(x0 - 1000*(-b));
pt2.y = cvRound(y0 - 1000*(a));
line( cdst, pt1, pt2, Scalar(0,0,255), 3, CV_AA);
}
imshow("source", src);
imshow("detected lines", cdst);
if( waitKey() == 32 )
break;
}
}
return 0;
}

Answer 1

Change waitKey() to waitKey(10).
waitKey() - will wait for keypress infinite time.