How to obtain zero copy rendering in QT display with gstreamer

[nishithaa]

We need to setup hardware accelerated playback of an rtsp streaming pipeline using gstreamer with QT display.

Is there a way to get zero copy of the video frames from gstreamer pipeline to QT display ?

[Dexter9313]

@nishithaa I have tried to do this for years to make a VR video player using Qt and I'm finally close to achieving it but without gstreamer. I don't know if gstreamer is a requirement to you but I use libvlc 4, based on this example : https://github.com/videolan/vlc/tree/master/doc/libvlc/QtGL .

It compiles and runs well but I don't want to use QOpenGLWidget (I use QWindows with manually-managed QOpenGLContexts) and somehow I can't make it to work in this setup.