QVideoProbe控件在仍被引用时销毁

Question

I created a QCamera, and a QVideoProbe, which will allow me to access each frame of the video. The problem is that every time I close the app, I get this message in Qt Creator: 'QVideoProbe control destroyed while it's still being referenced!!!'.

I'm using Qt 5.11 on Windows 8.1. My compilator is MSVC 2015 (32-bit).

Here's my code:

Window::Window()
{
    if(!checkCameraAvailability())
    {
        QMessageBox::critical(this, "Error", "No camera is available");
        return;
    }

    m_camera = new QCamera;
    m_camera->setCaptureMode(QCamera::CaptureVideo);

    m_videoProbe = new QVideoProbe(this);

    if(!m_videoProbe->setSource(m_camera))
    {
        QMessageBox::critical(this, "Error", "setSource");
        return;
    }

    connect(m_videoProbe, SIGNAL(videoFrameProbed(QVideoFrame)), this, SLOT(cameraFrameProbed(QVideoFrame)));
    // For now the slot 'cameraFrameProbed' is empty

    m_camera->start();
}

What did I miss?

Answer 1

Problem solved! I replaced this line:

m_videoProbe = new QVideoProbe(this);

with this one:

m_videoProbe = new QVideoProbe;

But I still don't understand what was wrong with the first line.

EDIT: The previous solution has a memory leak! Here's the correct one:

I forgot to mention the parent of the QCamera when constructing it, there were actually 2 memory leaks...

So the code becomes:

m_camera = new QCamera(this);
m_videoProbe = new QVideoProbe(this);

And now it works!

Thank you so much Jeremy Friesner!