I want to install a camera at the door. Just a little, use a computer and a network cable. Do you need anything else?

Is your camera a USB or a normal BNC head? Does the camera itself have storage? If you don't shoot, it's an ordinary camera. You also need an acquisition card to connect to the computer and monitor the video on the computer. You'd better buy some video cables and power cables yourself. Network cable is not recommended. You also need a power supply for the camera. If the bolt is not hemispherical, you must have a bracket. I do surveillance.