Rendering a hardware frame and encoding it

[maxsupermanhd]

Hi, I am looking for hardware accelerated solutions of synthetic image rendering and encoding, so far go-astiav looks like does hardware encoding fairly well and I am now wondering from what libraries would I be able to render stuff on the texture (with shaders for example) and then be able to use that texture in a codec encoder.

Also a thought of "is this a good idea" comes to mind and I can't really answer it, should I just write a purely C wrapper around whole rendering chain and just feed it data and get encoded frames back?

Much thanks for your hard work.