How To Choose Right Network Video Recorders (NVR)
Traditional CCTV cameras are legacy technology and come with their hub and storage space. World gradually moving to more advanced IP video surveillance cameras as they don’t require wiring and provide better quality high definition videos and come with loaded features like cloud storage, motion alerts, face recognition & movement tracking. In environments where there are multiple cameras to be monitored/video recorded then it can be done with NVR
What is NVR?
Network Video Recorder (NVR) is dedicated computer system that includes a software to records videos in a digital format to internal or attached disk drive. NVR has the capability record, stores and plays back video streams to various visual units (computer screens/TVs). They connect to the cameras in wireless/wired mode.
What is the need for a NVR?
An NVR is great if you want to monitor different locations from a centralized point. Having a dedicated storage device allows access to large storage capacities. NVR allows you to record videos without the Internet and access the footage locally.
Camera come with built-in SD card recorder, the biggest challenge is when add more cameras, you need more SD Cards. SD card have limited space and higher the space prices go as much as camera. When cameras are stolen or vandalized videos are also lost, in case of NVR it will be sitting in different location and can provide critical evidence
Is ONVIF important in NVR System?
ONVIF is a protocol that works in video surveillance devices. It allows the communication of IP devices from different manufacturers to NVR seamlessly. An NVR system that is ONVIF compliant works with cameras from other companies. Most IP cameras are ONVIF compatible, but it is always advisable to double check. Before you buy an NVR, make sure it supports ONVIF protocol or you will not be able to use third-party cameras that are price competitive.
How to choose right model?
NVRs can be classified by the number of channels they support (One channel support one camera). That can be 4, 8, 16 or 32 channels. Some high-end NVRs can even support up-to 256 channels of video recording and management. There are software-based NVRs available that can be installed a PC as well
What is Recording resolution?
While the live view from a camera can be of HD resolution but storage happens in SD to conserve space on local storage (SD card/Cloud). A high definition recording NVR should be your choice if you decide to setup an HD video surveillance system. Generally, before choosing your NVR system, you need to consider how many IP video cameras your environment requires, how many in them are high resolution cameras. Some NVRs record in high resolution in all channels and some only can do it in 1-2 channels (May look same but prices vary based on this feature)
How many channel NVR?
NVRs come in various sizes (channels); you should also make sure that the NVR system has more than the required number of channels for future expansion. For instance, if you are planning to install 4 IP video cameras for your present surveillance, you should select 8 or 9 channel NVR to be able to cover more spots in the future. If this is not done, when more cameras added in future, one would be forced to buy a new NVR to cover additional cameras or get a new NVR with higher size.
Choosing the appropriate storage
IP video surveillance systems require mega storage space to store all of the recorded data. You need to estimate how much storage space will be need to store footage for the desired number or recording days (click here to know more). NVR systems can support SATA/ eSATA interface or USB base HDD. Check that before placing the order of hard disk