The RK3588S processor is advertised as having 8K@30fps H.264 decoder and 8K@30fps H.264 encoder. We need a solution that can utilise the hardware decoder and encoder, but the images do not appear to provide this support.

Which of the available images provide both hardware decode and encode support?

The Ubuntu Jammy image has no hardware decode or encode support available.
The Debian Buster image has only hardware decode available. Not yet tested to confirm this is functional.