Motion is recorded first. Detection names the person, vehicle, or animal, and it never decides whether the recording exists. It runs on the computer you own. A graphics card helps and is not required.
Detection runs on the computer you own. A graphics card is optional. The sizing page is where a camera count comes from.
Draw the driveway as a zone you care about, and the road as a zone you do not. A class filter can keep one camera to people, or to vehicles. Detection names what it sees. It does not decide whether the recording exists.
person only, confidence ≥70%, ntfy push, cooldown 60s, active 10PM-6AM.car + truck, confidence ≥50%, webhook to Home Assistant, cooldown 5 min.Zones tell a camera which part of the picture matters. Detection still only names what moved. A windy tree line costs more CPU than an empty hallway, which is why the sizing page asks about busy scenes.