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"can you tell me which of that are deprecated??" - ALL of them..

it's probably a good idea, to take a look at the tutorials , and use code like below to access the webcam:

#include "opencv2/opencv.hpp"
using namespace cv;

int main()
{
    VideoCapture cap(0); // get 1st cam
    while( cap.isOpened() )
    {
        Mat frame;
        if ( ! cap.read(frame) )
            break;
        imshow("lalala",frame);
        int k = waitKey(10);
        if ( k==27 )
            break;
    }
    return 0;
}

"can you tell me which of that are deprecated??" - ALL of them..

it's probably a good idea, to take a look at the tutorials , and use code like below to access the webcam:

#include "opencv2/opencv.hpp"
using namespace cv;

int main()
{
    VideoCapture cap(0); // get 1st cam
    while( cap.isOpened() )
    {
        Mat frame;
        if ( ! cap.read(frame) )
            break;
        imshow("lalala",frame);
        int k = waitKey(10);
        if ( k==27 )
            break;
    }
    return 0;
}

g++ my.cpp -lopencv_core -lopencv_highgui -lopencv_videoio -o myfirstwebcam

"can you tell me which of that are deprecated??" - ALL of them..

it's probably a good idea, to take a look at the tutorials , and use code like below to access the webcam:

#include "opencv2/opencv.hpp"
using namespace cv;

int main()
{
    VideoCapture cap(0); // get 1st cam
    while( cap.isOpened() )
    {
        Mat frame;
        if ( ! cap.read(frame) )
            break;

        // process your frame here..

        imshow("lalala",frame);
        int k = waitKey(10);
        if ( k==27 )
            break;
    }
    return 0;
}

and link it like:

g++ my.cpp -lopencv_core -lopencv_highgui -lopencv_videoio -o myfirstwebcam