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VideoCapture capture(0);

if(!capture.isOpened())
{
return (-1);
}
double width= capture.get(CV_CAP_PROP_FRAME_WIDTH);//u can get the width of the frame
double height= capture.get(CV_CAP_PROP_FRAME_HEIGHT);;//u can get the height of the frame
Mat Frame;
for( ; ; )
{
capture>> Frame;
if(!Frame.empty())
{
do what ever u want with the captured frames
}
if(waitKey(30) == 27)//since esc key ASCII Value is 27 and if it is pressed for 30 ms it will stop the camera
{
cout<<"Esc key is pressed"<<endl;
break;
}

VideoCapture capture(0);

if(!capture.isOpened())
{
return (-1);
}
double width= capture.get(CV_CAP_PROP_FRAME_WIDTH);//u can get the width of the frame
double height= capture.get(CV_CAP_PROP_FRAME_HEIGHT);;//u can get the height of the frame
Mat Frame;
for( ; ; )
{
capture>> Frame;
if(!Frame.empty())
{
do what ever u want with the captured frames
}
if(waitKey(30) == 27)//since esc key ASCII Value is 27 and if it is pressed for 30 ms it will stop the camera
{
cout<<"Esc key is pressed"<<endl;
break;
}