qmlvideo: video not showing with linuxfb

[mroehling 0]

Hello,

I have a problem with the qmlvideo application on our stm32mp1 board and qt 5.12.
Using eglfs the application works properly and the mp4 video is shown correctly.
However, if i switch to linuxfb playing the video only leads to a black screen while the
fps counter is varying constantly and the correct timeline of the video is displayed in the bottom .
There are no qt errors or warnings shown in the debug log. Also, playing the video with
gstreamer and the linufb is worinking just fine. Thus, i dont really understand what the
problem could be.
Cheers and thank you very much

Additional Infos:
Using yocto linux (4.19) with no x11 and no wayland.