offscreen rendering and gstreamer processing

[K nard]

Hello,

I would like to render a qml file offscreen and forward the result to a GStreamer pipeline.
First, I have succeeded to render the scene offscreen grab the image from the QOpenGLFramebufferObject with the toImage method and forward it to the pipeline with an appsrc none.
Now I would like to use more hardware acceleration and I'd like to forward directly the opengl texture to the pipeline. I have modify the pipeline accordingly and now I don't have any error on log (none from Qt, none from GStreamer) but the output is a transparent image.

My code is here and for now it's design to run only under EGL because the GStreamer setup is hard-coded to match the actual Qt back-end used on my machine.

I can provide GStreamer logs if needed but they can be quite verbose.

Did I missed anything regarding the Qt setup ? or did the problem seems to come from my pipeline and I should more try on GStreamer mailing list ?

Regards,

[K nard]

I solved my issue. it was related to wrong initialization of opengl context in gstreamer.