Qt3D - Video Texture

IntenseDejavu

Hello everybody!
I'm creating a 3D scene in C++ via 3D render module.
I'm not using any qml file, just C++.

I sucessfuly got a 3d scene with my custom object in it. Everything was going fine but now i think i hit the wall...

I need to set an image texture on my object.... the problem is that it should update quickly ( video texture )....
I got the image there but i can only load it at costruct time since it needs a QUrl.... but my intention is to use a Opencv frame ( cv::Mat) is there any workaround on it? (I think writtig a png and load for each frame will grill the computer!)
I searched alot on Qt Material classes and none of them AFAIK supports it.... I sucessfully got the Mat to QImage....but there's no way to use QImage aswell.... Abstract texture was good but only accepts QUrl.

Any workarounds or feedback would be appreciated thanks!

I will leave some snippets of my code

Where I need to load the frame texture from opencv...

    // screen
    m_screenEntity = new Qt3DCore::QEntity(m_rootEntity);
    // screen shape data
    screenMesh = new Qt3DExtras::QPlaneMesh(m_screenEntity);
    screenMesh->setWidth(0.6);
    screenMesh->setHeight(0.23);

    // screen mesh transform
    screenTransform = new Qt3DCore::QTransform(m_screenEntity);
    screenTransform->setScale(1.3f);
    screenTransform->setRotation(QQuaternion::fromAxisAndAngle(QVector3D(1.0f, 0.0f, 0.0f), 90.0f));
    screenTransform->setTranslation(QVector3D(posx, posy, posz+ screenoffset));

    //screen material
    screenMaterial = new Qt3DExtras::QPhongMaterial(m_screenEntity);
    screenMaterial->setDiffuse(QColor(QRgb(0xa69929)));

The frame processing

        Mat frame;
        // Capture frame-by-frame
        this->cap >> frame;

        // If the frame is empty, break immediately
        if (frame.empty())
            break;

        // Display the resulting frame --> should update object texture instead
        imshow("Frame", frame); 

        // Press  ESC on keyboard to exit
        char c = (char)waitKey(25);
        if (c == 27)
            break;
    }

thanks,
André

drawmer

@IntenseDejavu Any solution for this? I'm in the same problem. But every "solution" I find isn't suported in QT 5.15. Or need a QUrl. But I also need to simulate a video with Cv:Mat