@GyroPower Just create your render thread before you call Qt_wb_app_manager.exec();

@Oscar-Jeej That's the neat part... I didn't. This was just a mockup I drew up on figma. Good luck on your endevour though! I'll try out @Laffey solution first and see what I can do. I have to admit i forgot 99% of Qt stuff since i took a hiatus EDIT-- never mind, this implementation also limited to 8px. Im really thinking best option is just to draw my own window using dx11 or something

@sierdzio Thank you a lot for your answer ! Your explaination on the opaque pointer is clear, I didn't have that notion before. With this knowledge, most of my questions are wrong, like the 5th.

@SGaist thanks for response. Assume we use http://www.openh264.org/, I guess we would compile it for our Raspberry Pi based platform. Correct ? Are there steps to configure QT (or underlying libs) to use newly compiled openh264 codec ?