Hey guyes i'm having trouble opening two webcam with version 2.4.6. One webcam is the mounted laptop webcam and the other is a usb webcam.
include "opencv2/highgui/highgui.hpp"
include <iostream>
using namespace cv; using namespace std;
int main(int argc, char* argv[]) { VideoCapture cap(0); // open the video file for reading VideoCapture cap2(1); if ( !cap.isOpened() ) // if not success, exit program { cout << "Cannot open the video file" << endl; return -1; }
if ( !cap2.isOpened() ) // if not success, exit program
{
cout << "Cannot open the video2 file" << endl;
return -2;
}
//cap.set(CV_CAP_PROP_POS_MSEC, 300); //start the video at 300ms
double fps = cap.get(CV_CAP_PROP_FPS); //get the frames per seconds of the video
cout << "Frame per seconds : " << fps << endl;
namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
while(1)
{
Mat frame;
Mat frame2;
bool bSuccess = cap.read(frame); // read a new frame from video
bool bSuccess2 = cap2.read(frame2); // read a new frame from video
if (!bSuccess) //if not success, break loop
{
cout << "Cannot read the frame from video file" << endl;
break;
}
imshow("MyVideo", frame); //show the frame in "MyVideo" window
imshow("MyVideo", frame2); //show the frame in "MyVideo" window
if(waitKey(30) == 27) //wait for 'esc' key press for 30 ms. If 'esc' key is pressed, break loop
{
cout << "esc key is pressed by user" << endl;
break;
}
}
return 0;
}
