How do I display a button on a QLabel covered by GstVideoOverlay

General Discussion
1

I created a QWidget, added a QLabel and a QButton to the QWidget, and then I created the gstreamer pipeline, The d3d11videosink is bound to the QLabel object using the gst_video_overlay_set_window_handle method. Then I set QButton to the top (raise()), but the button is always covered by QLabel. How do I set the QButton so that it appears at the top of the QLabel?

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2

Try to set the flag to the button and see if it works.
setWindowFlags((Qt::WindowFlags)(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint ) );