So I have a usb logitech webcam and a built in laptop webcam. I am trying to start both the webcam at same time. I made a demo code below to test but cap2 object keep failing to open. Do any you guys have a suggestion.

include <iostream>

include <opencv2\highgui\highgui.hpp>

include <string>

int main(int arg, char * args[]) { cv::VideoCapture cap, cap2; cv::Mat mat1; cv::Mat mat2;

cap.open(0);
cap2.open(1);
if(!cap.isOpened())
    return -1;
if(!cap2.isOpened())
    return -2;

cv::namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
cv::namedWindow("MyVideo2",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo2"
while(true)
{
    cap.read(mat1);
    cap2.read(mat2);

    cv::imshow("MyVideo",mat1);

    cv::imshow("MyVideo2", mat2);
}
cap.release();
cap2.release();
return 0;

}

So I have a usb logitech webcam and a built in laptop webcam. I am trying to start both the webcam at same time. I made a demo code below to test but cap2 object keep failing to open. Do any you guys have a suggestion.

include <iostream>

include <opencv2\highgui\highgui.hpp>

include <string>

int main(int arg, char * args[]) { cv::VideoCapture cap, cap2; cv::Mat mat1; cv::Mat mat2;

cap.open(0);
cap2.open(1);
if(!cap.isOpened())
    return -1;
if(!cap2.isOpened())
    return -2;

cv::namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
cv::namedWindow("MyVideo2",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo2"
while(true)
{
    cap.read(mat1);
    cap2.read(mat2);

    cv::imshow("MyVideo",mat1);

    cv::imshow("MyVideo2", mat2);
}
cap.release();
cap2.release();
return 0;

}

So I have a usb logitech webcam and a built in laptop webcam. I am trying to start both the webcam at same time. I made a demo code below to test but cap2 object keep failing to open. Do any you guys have a suggestion.suggestion. cap is the default which is the logitech webcam and cap2 is the built in web cap.

include <iostream>

include <opencv2\highgui\highgui.hpp>

include <string>

int main(int arg, char * args[]) { cv::VideoCapture cap, cap2; cv::Mat mat1; cv::Mat mat2;

cap.open(0);
cap2.open(1);
if(!cap.isOpened())
    return -1;
if(!cap2.isOpened())
    return -2;

cv::namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
cv::namedWindow("MyVideo2",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo2"
while(true)
{
    cap.read(mat1);
    cap2.read(mat2);

    cv::imshow("MyVideo",mat1);

    cv::imshow("MyVideo2", mat2);
}
cap.release();
cap2.release();
return 0;

}

So I have a usb logitech webcam and a built in laptop webcam. I am trying to start both the webcam at same time. I made a demo code below to test but cap2 object keep failing to open. Do any you guys have a suggestion. cap is the default which is the logitech webcam and cap2 is the built in web cap.

#include <iostream>
#include <opencv2\highgui\highgui.hpp>
#include <string>

int main(int arg, char * args[])
{
cv::VideoCapture cap, cap2;
cv::Mat mat1;
cv::Mat mat2;
 
mat2;
cap.open(0);
 cap2.open(1);
 if(!cap.isOpened())
  return -1;
 if(!cap2.isOpened())
  return -2;
 cv::namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
 cv::namedWindow("MyVideo2",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo2"
 while(true)
 {
 cap.read(mat1);
 cap2.read(mat2);
 cv::imshow("MyVideo",mat1);
  cv::imshow("MyVideo2", mat2);
 }
 cap.release();
 cap2.release();
 return 0;
}
  
}