I understand that certain camera models include features like face detection, license plate reading, etc., but can some of this be processed be the NVR using standard cameras? I know Dahua has their "Lite", "Pro", "WizMind" and WizSense" models of NVRs and it looks like the "Pro" NVR5216-16P-4KS2E , "WizMind" NVR5216-16P-I/L and "WizSense" NVR2216-16P-I models may do some of that processing on the NVR. Can anyone provide a little more insight into the differences between these models of NVRs and the possibility of using basic Dahua cameras with these NVRs to get these features? What do you think is the best bang for the buck in Dahua cameras with face detection?