UE 4.27 nDisplay Quickstart

Mar 29, 2023

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nDisplay

For playback, we are using a system through nDisplay in Unreal Engine. The system is a control server for media management and operation, along with six high-spec server nodes. All server nodes and the LED processing are genlocked to house sync and synchronized depending on the camera head and frame rate. We would strongly recommend genlocking to house sync.

SWITCHBOARD SETTINGS

Ensure auto-join is enabled in multiuser settings
disable multiuser server in UI mode (buggy)

CT BASE PROJECT

https://www.dropbox.com/s/m5b0ppxt97c6pqn/ArriCtConfig427.zip?dl=0

OPERATING INSTRUCTIONS

Sync project files across machines
Open Switchboard
Connect to Nodes
Select the correct level to load
Launch the control editor first so it hosts the MU session
Click launch and wait until all cores have stabilized utilization, and pre-present-wait has finished rendering/syncing the first frame

DEBUG STEPS

Read the trace/crash logs
Add trace to switchboard settings “Extra cmd line args” -tracehost=172.16.16.177
Try launching the project through Unreal Editor instead of nDisplay, this will let you know if there’s a problem with the project, paths, or assets when launching. Instead of assuming it’s a problem with nDisplay.
To reconnect/sync LiveLink: LiveLink.Preset.Apply Preset=/Game/Folder/MyLiveLinkPreset.MyLiveLinkPreset

USEFUL LINKS

Unreal nDisplay Documentation
Unreal Engine 4.27 In-Camera VFX Tutorials | 3: nDisplay Config
How to saturate a network: iperf.exe -c <serverIP> -P16 -b 10000M