Qt 5 and OpenCV 4 Computer Vision Projects

Listing cameras with Qt

By using the QCameraInfo class from the Qt library, we can easily obtain the available cameras on the current computer. It has a static method named availableCameras that returns a list of QCameraInfo objects.

Now, we are going to add a slot for cameraInfoAction to do this work. First, we declare a private slot in the body of the MainWindow class in the mainwindow.h file:

     private slots:         void showCameraInfo();

Then, we give its implementation, as follows:

     void MainWindow::showCameraInfo()     {         QList<QCameraInfo> cameras = QCameraInfo::availableCameras();         QString info = QString("Available Cameras: \n");         foreach (const QCameraInfo &cameraInfo, cameras) {             info += " - " + cameraInfo.deviceName() + ": "; info += cameraInfo.description() ...