GstVideoOverlay SetRenderRectangle question

[tom]

Hello

I don't quite understand how VideoOverlayAdapter.SetRenderRectangle (from
gstreamer-sharp) and gst_video_overlay_set_render_rectangle works.

I have modified
https://github.com/GStreamer/gstreamer-sharp/blob/master/samples/BasicTutorial5.cs
to set the render rectangle, like this:

            VideoOverlayAdapter adapter = new
VideoOverlayAdapter(overlay.Handle);
            adapter.WindowHandle = windowHandle;
            adapter.SetRenderRectangle(50, 50, 427, 240);
            adapter.HandleEvents(true);

I expected that the video will be rendered in the 427x240 rectangle, at the
position 50,50, but there is a correct rectangle at the position, and video
is moved to the 50,50 inside this rectangle. The same happens in the
WinForms version of the sample.

See the image
<http://gstreamer-devel.966125.n4.nabble.com/file/t378393/renderrect.jpg> 

Is this the correct behavior or a bug ?

I'm using GStreamer 1.14.1 32bit on Windows 10.

Thanks, 
Tom



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