How to display opencv output window inside a Label or Widget in form.ui

pj0909

Hi all,

I am new to Qt and opencv, I am programming a graphical interface to record a video through webcam using opencv libraries in Qt. Problem is when I push the start recording button on my interface, a new window gets launched and I dont want that. It should be like after pressing the start recording button it should display the opencv output of webcam inside a Label or Widget on my graphical interface and not on a newly launched window.

I am using Qt 5.8 on windows 10. Below is the while loop which captures the frame and displays in a window

while (1)
            {

                Mat frame;

                bool bSuccess = cap.read(frame); // read a new frame from video

                if (!bSuccess) 
               {
                     cout << "ERROR: Cannot read a frame from video file" << endl;
                     break;
                }

                 oVideoWriter.write(frame); 
                 

                imshow("MyVideo", frame); //this line launches a new output window


               if (waitKey(10) == 27) 
               {

                    cout << "esc key is pressed by user" << endl;
                    return ;
                    
                }
            }

Can anyone please guide me on how can I embed the opencv output window inside a Label or Widget in my form.ui.

Thank you for your time and knowledge.

SGaist

Hi,

AFAIK, you can't direclty.

One way to do it is described here.

pj0909

@SGaist I tried with your suggested link and it works. Thank you so much