Frigate is slightly more useful than standard NVR.
NVR motion detection only checks if there was pixel change(motion) frame to frame
Frigate adds upon this by checking the frame where pixel changed and sending it to model to determine if a specific object,like car or dog, was in frame and provide a score based on confidence. This reduces notifications for something like an entry where you want notification if person enters. NVR can only determine if something changed vs frigate saying person detected with 75% confidence
Frigate is improving and extremely good. Its review capabilities are amazing as you can scroll a timeline and see all cameras at once while zoomed on a camera of interest. It also has a sort of heat map on timeline for detections. I’ve tried everything and to date this is the best
Alternatively you can use Reolink NVR and send detections to AI and retrieve descriptive text. You may parse that text for keywords and have notifications based off that. This is next step for NVRs and possible with Reolink or frigate.