I don't have a NanoPC-T4, but I have a NanoPC-T6 which I mainly bought because of the Dual Camera options of the MCAM400 on the T4 and the high-speed encoding properties of the Rockchip... those possibilities should be very similar for the T6 actually...
Whatever, the camera configuration seems to be mostly here but I struggle to do the similar thing with the device tree of the T6...
Anyone who has an idea about this and is willing to help me with that?