The core product of networked monitoring, NVR (Network Video Recorder), has essentially become an IT product. The main function of NVR is to receive digital video bitstreams transmitted by devices such as IPC (network cameras) and DVS (video encoders) through the network, and store and manage them. Its core value lies in video middleware, which is widely compatible with the encoding formats of different digital devices from various manufacturers through video middleware, thus achieving distributed networking