Camera Viewer

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Copyright © 2019 Userful Corporation. All rights reserved.
(Updated 2018.04.13)

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Userful software enables users to monitor the displays the video walls by launching USB web camera(s), if any connected to the server.

Configure Camera Viewer

Webcam Screenshot.png
  1. Open Control Center and Click on Support > Launch Camera.
  2. Select the Camera from the drop-down menu.
  3. Select the Resolution from the drop-down menu.
  4. Select the Rotation type from the drop-down menu.
  5. Enable Auto Launch if required to automatically launch Camera Viewer each time Control Center starts.
Camera Viewer window will now show the content playing on the displays as shown in the image to the right.


This section outlines the solutions to the common problems encountered while using USB web cameras.

Unable to play live camera feed when connected to Zero Client Receiver
  • Where possible lower the resolution of the camera, OR
  • Unplug the camera from the zero client receiver and connect it to the onboard display.
Unable to launch camera
  1. Delete the corresponding source under Control Center > Mapping.
    Camera may be in use by the Video Capture source.
  2. Reboot the server.
  3. Open Control Center.
  4. Go to Support > Launch Camera.
V4L devices (e.g., YUAN capture cards etc.) appear under list of cameras
  • Ignore those device(s) and select the appropriate USB web camera.
Unable to access camera through Userful Cloud
  • Ensure that firewall is not blocking access to
  • To verify, Go to Linux Desktop > MATE Terminal and ping
  • Edit the firewall rule to open, if the access is blocked
Camera not detected in the Control Center
  • Try different camera of another make and model.

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