Nx Witness User Manual
Video Wall mode lets you use a session of the Nx Witness Desktop Client to remotely control display on other monitors in your System via a LAN, WAN, or internet connection.
A special Video Wall License is required (see "Nx Witness Licenses"). Each license allows you to display a Video Wall on up to 2 monitors (for example, 4 licenses allow you to display a Video Wall on 8 monitors). When a Video Wall license is invalidated, the Video Wall Failover feature kicks in and provides you with a 7-day grace period to prevent any interruptions in the Video Wall and allows you enough time to resolve the license issue (see Expired and Invalid License Keys). A countdown will be shown until your Video Wall license key has been restored or a new one is activated in its place. If no action is taken, the error message "Not enough licenses" will be shown, and your Video Wall will be disabled. Video Wall Failover is automatically enabled after Video Wall is configured.
Note: To be able to configure and control a video wall, a user must be assigned the related permission.
Layout and camera settings may be changed while editing video wall screen, and settings are saved on the server or on the machine where video wall is running.
The resolution of a camera when in video wall mode can be changed via the context menu, but to take effect, this must be done in the Screen under Video Walls in the Resource Tree, and not in the standard layout.
Video Walls do not display any overlays or performance alerts while a camera is in live mode and do not display the Timeline unless that option is enabled. However, the timestamp is always displayed when a Video Wall camera is in archive mode, and it is possible to add backgrounds to layouts and to assign a logical ID to a Video Wall layout.
Video Wall Architecture
A Video Wall Server is the computer that hosts the main database of a Video Wall Cluster. Video Wall displays can be connected to this server and it can act as the Video Wall Processor as well. All computers that are part of the Video Wall Cluster (clients and controllers) should be Cloud connected or able to connect to the Server.
The Video Wall Processor is the computer that Video Wall displays are connected to. Depending on its configuration it can handle one or several displays. There is no limit to the number of Video Wall Processors that can be combined in a Video Wall Cluster.
A Video Wall Controller is any computer that can connect to a Video Wall and control it. It can even be a laptop; the only requirement is that the video adapter should support OpenGL > 2.0.
In order to operate Video Wall properly, Nx Witness should be installed on every computer in the Video Wall Cluster:
•Video Wall Server: Full installation.
•Video Wall Processor(s): Client only installation.
•Video Wall Controller(s): Client only installation.
If all Video Wall components are installed on one computer, choose Full installation.
Initial Video Wall configuration is performed in several steps:
•Configuring a Video Wall Display
•Controlling Video Wall Displays
You can also Delete a Video Wall or it's Elements, or Push an Operator's Screen to a Video Wall.
The number of displays available to any single computer is limited by the number of video outputs it has. To extend Video Wall it is necessary to add additional computers and combine them with the Video Wall Cluster. See "Configuring Video Wall on Several Computers".
