NVR NVR(Network Video Recorders) is a network device based on Internet IP Protocol (Internet Protocol). The related functions of NVR are all based on IP architecture. Therefore, it can be remotely managed through local area network or wide area network, and has quite strong flexibility in constructing network video monitoring system. The basic function of NVR is to remotely access and record video streams captured by IP cameras or DVS at the same time, this easy-to-use and easy-to-install feature is widely favored by the security industry.