Engineering:Network video recorder
A network video recorder (NVR) is a specialized computer system that records video[1] to a disk drive, USB flash drive, memory card, or other mass storage device. An NVR itself contains no cameras, but connects to them through a network, typically as part of an IP video surveillance system. NVRs typically have embedded operating systems.
As a more flexible and serviceable alternative to NVRs, ordinary computers may be equipped with video management software (VMS).
NVRs differ from digital video recorders (DVRs), as an NVR's input is from a network rather than a direct connection to a video capture card or tuner. Video on a DVR is encoded and processed at the DVR, while video on an NVR is encoded and processed at the camera, then streamed to the NVR for storage or remote viewing.[2] Additional processing may be done at the NVR, such as further compression or tagging with metadata.
Hybrid NVR/DVR surveillance systems exist which incorporate functions of both NVR and DVR.
See also
- Video management system
- Closed-circuit television (CCTV)
- Closed-circuit television camera
- Digital video recorder
- List of free television software
- ZoneMinder, a free closed-circuit television software application
References
- ↑ "Network Video Recorder | NVR and Video Management Systems for IP Cameras" (in en-US). Kintronics. https://kintronics.com/solutions/ip-camera-systems/video-recording-systems/network-video-recorder/.
- ↑ "Determining the Right Storage Option for Video" (in en). https://www.securitymagazine.com/articles/83353-determining-the-right-storage-option-for-video?v=preview.
ru:Видеорегистратор#Сетевые видеорегистраторы (NVR)
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