Why one network camera should not be added to multiple NVRs?

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Question: How to store/live view one camera on multiple NVRs?

Answer:

Backup of videos: RAID or N+1 backup is recommended to back up the videos in the NVRs.

Live view of one camera on multiple NVRs:

The camera should be added to one camera in the normal way so that the camera is managed by only one NVR. The camera can be added to other NVRs by RTSP in customer protocol. Then the NVRs are able to access to the live view stream of the camera, but they would not have the access to manage the camera.

Related Mechanisms in the Process of Network Camera Being Added to NVR

NVR works as management device for the network cameras and is able to manage and set the parameters of the network cameras added to it.

Once a network camera is added to the NVR, the NVR would acquire the all parameters of the camera, including resolution, bandwidth, image settings etc. Motion detection of camera is turned on automatically and the arming schedule of all events is set to all-day. These works to guarantee that camera is able to respond to event configurations on the NVR.

The NVR would synchronize the time of the camera every 10 minutes. If the camera is directly added to iVMS-4200 or iVMS-5200, the VMS shares the same management authority to synchronize the camera. If the time of the VMS and time of the NVR is different, the VMS and NVR would synchronize the camera in turn. Therefore, the camera should not be added to VMS directly when it is already added to NVR. The correct operation is to add the NVR to the VMS and configure the camera though NVR.

If the camera is to be configured, the parameters should be configured on the NVR instead of the camera web component or VMS. If the parameters of camera are changed on the camera directly, they would be synchronized by NVR later.

In the NVR local configuration interface – Recording Parameters, there are two sets of parameters, one for continuous recording and the other for event recording. The event recording parameters can only be configured in the local interface and cannot be found on NVR web interface. When an event is triggered, the recording parameters of the camera would be set to the event recording parameters. When no events are triggered, the continuous recording parameters are applied. The event recording parameters can be different from the continuous recording parameters in max. bitrate and frame rate. If user doesn’t need the event video with different frame rate or max. bitrate compared to the continuous video, the event parameters should be the same with continuous parameters.

Note: Some customer may find that the frame rate or max. bitrate of the camera is sometimes changed on the camera web interface and consider it to be a bug. This might be caused by the configuration of the NVR’s event recording parameters. In most cases, the camera would not be able to change its parameters by itself.