How to show video in video, using gstreamer on wayland (weston)?

TryChen

Hi Sirs,
I want show video in video, using gstreamer on wayland(weston).
the following is the part of my code, let gstwaylandsink render on qt widget,

QPlatformNativeInterface *native =
            QGuiApplication::platformNativeInterface();
struct wl_surface *surface = static_cast<struct wl_surface *>(
native->nativeResourceForWindow("surface", m_topWidget->windowHandle()));
gst_video_overlay_set_window_handle(
            GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (msg)),
            (guintptr) surface
        );
gst_video_overlay_set_render_rectangle(
            GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (msg)),
            rect.x(), rect.y(),
            rect.width(), rect.height()
        );

I use QGridLayout, trying to overlap the video,

      m_layout->addWidget(m_videoWidgetArr[iMain], 0, 0, 3, 3);
      m_layout->addWidget(m_videoWidgetArr[iMain+1], 2, 2, 1, 1);

But , it is no use, what do i miss?
Thank you for reading.

SGaist

Hi and welcome to devnet,

What result are you getting currently ?

One way would also be to place them by hand in your container widget.

TryChen

@SGaist The result looks like randomly, sometimes only show the bigger video, sometimes the bigger video covers the smaller one.
Thanks for your reply.