[WINDOWS] Overlay window not handled correctly by mfxsink

[boxerab]

see ishmael1985#31 for details.

[boxerab]

A polite ping on this issue - seems like a major flaw in mfxsink.

[ishmael1985]

@boxerab maybe, but it doesn't make practical sense to implement such a feature, since memory copies will be involved when painting with the overlay window. If that is the case, you might just as well use d3dvideosink.
A better solutiion would be to use glimagesink with zero-copy, but it is more technically involved from an application developer's perspective. You could take this as your coding challenge, @boxerab .

[boxerab]

Thanks @ishmael1985 . So, the mfx decoder can interoperate with glimagesink ?

[ishmael1985]

Yes.
https://github.com/GStreamer/gst-plugins-base/blob/master/tests/examples/gl/generic/cubeyuv/main.cpp

[boxerab]

Thanks. I don't want to draw an overlay onto the rendered frame, I am looking for an implementation of

GstVideoOverlay

GstVideoOverlay — Interface for setting/getting a window system resource on elements supporting it to configure a window into which to render a video.

On master mfxsink, there seems to have been work on supporting this on LInux, but not windows.