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v3.2
v3.2
  • OptiTrack Documentation
  • WHAT'S NEW
    • What's New in Motive 3.2
  • QUICK START GUIDES
    • Quick Start Guide: Getting Started
    • Quick Start Guide: Prime Color Camera Setup
    • Quick Start Guide: Precision Capture
    • Quick Start Guide: Tutorial Videos
    • Quick Start Guide: Active Marker Tracking
    • Quick Start Guide: Outdoor Tracking Setup
  • HARDWARE
    • Cameras
      • Ethernet Cameras
        • PrimeX 120
        • PrimeX 41
        • PrimeX 22
        • PrimeX 13
        • PrimeX 13W
        • SlimX 13
        • Prime Color
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        • VersaX 120
      • USB Cameras
        • Slim 3U
        • Flex 13
        • Flex 3
        • V120:Duo
        • V120:Trio
        • Adjusting Global Origin for Tracking Bars
    • Prepare Setup Area
    • Camera Mount Structures
    • Camera Placement
    • Ethernet Camera Network Setup
      • General Overview and Specs
      • Windows 10 Network Settings
      • Cabling and Load Balancing
      • Switch Configuration for PrimeX 120
      • NETGEAR ProSafe GSM7228S: Disabling the Broadcast Storm Control
      • White/Blacklisting Cameras
    • USB Camera System Setup
      • USB Camera Network Overview and Specs
      • V120:Duo and Trio Setup
      • Tracking Bar Coordinate System
        • Transforming Coordinate System: Global to Local
    • Aiming and Focusing
    • Camera Status Indicators
  • MOTIVE
    • Installation and License Activation
    • Motive Basics
    • Calibration
      • .mcal XML Calibration Files
      • Continuous Calibration
      • Continuous Calibration (Info Pane)
      • Calibration Squares
    • Markers
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    • Rigid Body Tracking
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    • Data Streaming
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  • MOTIVE UI PANES
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      • Settings: General
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      • Properties Pane: Trained Markerset
      • Properties Pane: eSync2
    • Status Panel
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  • PLUGINS
    • OptiTrack Blender Plugin
      • OptiTrack Blender Plugin
    • OptiTrack Unreal Engine Plugin
      • Unreal Engine: OptiTrack Live Link Plugin
        • Quick Start Guide: Real-Time Retargeting in Unreal Engine with Live Link Content
        • Unreal Editor for Fortnite (UEFN): OptiTrack Plugin for Live Link Hub
        • Unreal Engine: Live Link Camera Stream Setup
        • Live Link Content: Active Puck Static Meshes
      • Unreal Engine: MotionBuilder Workflow
      • Unreal Engine: HMD Setup
      • Unreal Engine VCS Inputs
    • OptiTrack Unity Plugin
      • Unity: HMD Setup
    • OptiTrack OpenVR Driver
    • OptiTrack MATLAB Plugin
    • Autodesk Maya
      • Autodesk Maya: OptiTrack Insight VCS Plugin
    • Autodesk MotionBuilder
      • Autodesk MotionBuilder Plugin
      • Autodesk MotionBuilder: OptiTrack Skeleton Plugin
      • Autodesk MotionBuilder: OptiTrack Optical Plugin
      • Autodesk MotionBuilder: OptiTrack Insight VCS Plugin
      • Autodesk MotionBuilder: Timecode Data
    • OptiTrack Peripheral API
    • External Plugins
      • Houdini 19 Integration
  • ACTIVE COMPONENTS
    • Active Components Hardware
      • Active Puck
      • Wired AnchorPuck
      • CinePuck
      • Wired CinePuck
      • BaseStation
      • Information for Assembling the Active Tags
      • Manus Glove Setup
    • Configuration
      • Active Batch Programmer
      • Active Hardware Configuration: PuTTY
      • Active Component Firmware Compatibility
    • Active Marker Tracking
      • Active Finger Marker Set
  • SYNCHRONIZATION
    • Synchronization Hardware
      • External Device Sync Guide: eSync 2
      • External Device Sync Guide: OptiHub2
    • Synchronization Setup
    • OptiTrack Timecode
  • VIRTUAL PRODUCTION
    • Unreal Engine: OptiTrack InCamera VFX
    • Entertainment Marker Sets
    • PrimeX 41
  • MOVEMENT SCIENCES
    • Movement Sciences Hardware
      • General Motive Force Plate Setup
      • AMTI Force Plate Setup
      • Bertec Force Plate Setup
      • Kistler Force Plate Setup
      • Delsys EMG Setup
      • NI-DAQ Setup
      • Multiple Device Setup
    • Movement Sciences Marker Sets
      • Biomechanics Marker Sets
      • Biomech (57)
      • Rizzoli Marker Sets
    • For Visual3D Users
    • Prime Color Camera Setup
      • Prime Color Setup: Required Components
      • Prime Color Setup: Hardware Setup
      • Prime Color Camera Setup: Camera Settings
      • Prime Color Camera Setup: Prime Color FS Calibration
      • Prime Color Setup: Data Recording / Export
      • Prime Color Camera Setup: FAQ / Troubleshooting
      • Prime Color Camera Setup: Windows Network Settings
  • VIRTUAL REALITY
    • VR Plugins
      • VR Unreal Engine
        • OptiTrack Unreal Engine Plugin
        • Unreal Engine: OptiTrack Live Link Plugin
          • UE5.1 Live Link Retarget External Workaround
        • Unreal Engine VCS Inputs
      • VR Unity
        • OptiTrack Unity Plugin
      • VR OpenVR
        • OptiTrack OpenVR Driver
    • VR HMD Setup
      • Unreal Engine: HMD Setup
      • Unity: HMD Setup
      • Manually Calibrating the HMD Pivot Point
      • Sync Configuration with an HTC Vive System
    • SlimX 13
    • Active Marker Tracking
      • Active Finger Marker Set
    • Synchronization Hardware
      • External Device Sync Guide: eSync 2
      • External Device Sync Guide: OptiHub2
  • ANIMATION
    • Autodesk Maya
      • Autodesk Maya: OptiTrack Insight VCS Plugin
    • Autodesk MotionBuilder
      • Autodesk MotionBuilder Plugin
      • Autodesk MotionBuilder: OptiTrack Skeleton Plugin
      • Autodesk MotionBuilder: OptiTrack Optical Plugin
      • Autodesk MotionBuilder: OptiTrack Insight VCS Plugin
      • Autodesk MotionBuilder: Timecode Data
  • ROBOTICS
    • MoCap4ROS2 Setup
    • OptiTrack Robot Applications
    • Outdoor Tracking Setup
  • DEVELOPER TOOLS
    • Developer Tools Overview
    • Camera SDK
      • Class: cCameraModule
      • Class: cUID
    • Motive API
      • Motive API: Quick Start Guide
      • Motive API Overview
      • Motive API: Function Reference
      • Motive API Camera Calibration
    • NatNet SDK
      • NatNet 4.1
      • NatNet: Class/Function Reference
      • NatNet: Creating a Managed (C sharp) Client Application
      • NatNet: Creating a Native (C++) Client Application
      • NatNet: Data Types
      • NatNet: Matlab Wrapper
      • NatNet: Migration to NatNet 3.0 libraries
      • NatNet: Remote Requests/Commands
      • NatNet: Sample Projects
      • NatNet: Unicast Data Subscription Commands
      • Latency Measurements
    • VRPN Sample
    • Peripheral API: Glove Devices
  • SKELETON MARKER SETS
    • Full Body
      • Baseline (41)
      • Core (50)
      • Biomech (57)
      • Conventional (39)
    • Full Body + Fingers
      • Baseline + Passive Fingers (49)
      • Baseline + Active Fingers (57)
      • Core + Passive Fingers (54)
      • Core + Active Fingers (62)
    • Upper
      • Baseline Upper (25)
      • Conventional Upper (27)
    • Lower
      • Baseline Lower (20)
      • Helen Hayes Lower (19)
      • Conventional Lower (16)
    • Hand and Fingers
      • Left/Right Hand (4) Active
      • Left/Right Hand (10) Active + Passive
      • Active Finger Marker Set
    • Glove Device Setup
      • Manus Glove Setup
      • StretchSense Glove Setup
    • Rizzoli Marker Sets
    • Entertainment Marker Sets
    • Rigid Body Skeleton Marker Set
  • GENERAL TROUBLESHOOTING
    • Licensing Troubleshooting
    • Windows 11 Optimization for Realtime Applications
    • Network Troubleshooting
    • Troubleshooting Q&A
    • Running Motive on High DPI Displays
    • Firewall Settings
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On this page
  • Overview
  • Create Camera Asset in Motive
  • Attach the Camera Role in Unreal Engine
  • Configure Camera for Streaming
  • Add OptiTrack LiveLinkDisplay
  • Add the LiveLinkController
  • Camera Calibration

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  1. PLUGINS
  2. OptiTrack Unreal Engine Plugin
  3. Unreal Engine: OptiTrack Live Link Plugin

Unreal Engine: Live Link Camera Stream Setup

Setup guide to stream video cameras from Motive using the Camera Role in Unreal Engine.

PreviousUnreal Editor for Fortnite (UEFN): OptiTrack Plugin for Live Link HubNextLive Link Content: Active Puck Static Meshes

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Overview

Motive’s Live Link plug-in for Unreal Engine includes the ability to stream tracked rigid bodies for Virtual Production and InCamera VFX (ICVFX).

Motive tracks video cameras using a CinePuck, an active device equipped with an IMU. The CinePuck mounts directly to the video camera and, when aligned with the camera lens as a Rigid Body, tracks the camera's focal point so it can be replicated virtually in the Unreal Engine environment.

The Camera Role in Unreal Engine can now be used for the Tracked Camera Rigid Body. This means that you can now connect a lens file with the associated Live Link Camera Role Asset. In Unreal Engine, users can calibrate for lens distortion and nodal offset, and use the camera with a Lens Encoder, if desired.

This document provides instructions to setup and link a Rigid Body in Motive to a Live Link Camera Role in Unreal Engine. For information on ICVFX production in general, please see the page .

We used the standard InCameraVFX template in Unreal Engine for our sample project. The template includes all the necessary macros and assets needed for virtual production.

This template is located under Film / Video & Live Events in the Unreal Project Browser.

Create Camera Asset in Motive

Motive will stream the camera as a Live Link Rigid Body asset.

Connect the CinePuck and BaseStation

  • Plug the into one of the Power over Ethernet (PoE) switches on the OptiTrack camera network.

  • Firmly attach the to the Studio Camera using the SmallRig NATO Rail and Clamps on the cage of the camera.

  • The CinePuck can be mounted anywhere on the camera. For best results, put the puck closer to the lens.

  • Power on the CinePuck, and let it calibrate the IMU bias. The lights will flash red and orange during calibration and change to green when done.

We recommend powering the CinePuck with a USB cable while filming to avoid running out of battery power. A light on the CinePuck will indicate when the power is connected.

Create a Rigid Body

Attach the Camera Role in Unreal Engine

  • Select OptiTrack Source, check Connect Automatically, enter the IP address for the Motive PC in the Server Address field, the IP address for the Unreal PC in the Client Address field, and click Create. Enter 127.0.0.1 in both fields if running both on the same PC. Leave the Connection Type as Multicast and click create.

  • This will display a list of assets streaming from Motive. Note that the rigid body camera, named HandCam2, is currently in the Transform role.

  • Click OptiTrack in the Subject list to display the OptiTrack Live Link Properties.

  • In the Live Link Roles section, click the Live Link Subject dropdown. This will open the list of Assets streaming from Motive.

  • Select the camera asset, HandCam2 in this example.

  • Directly below the Live Link Subject field is a check box to Stream as Camera (Rigid Bodies Only). Check this box to apply the Camera Role to the camera rigid body (HandCam2).

Configure Camera for Streaming

Add OptiTrack LiveLinkDisplay

Move all the NDisplay assets to nest under OptitrackLiveLinkDisplay in the Outliner pane.

Add the LiveLinkController

  • Select the video camera, now nested under OptitrackLiveLinkDisplay in the Outliner pane..

  • Search for and select the Live Link Controller component.

  • Properties for the new Controller will display in the Camera details pane.

  • Click the dropdown next to Subject Representation and select the camera Rigid Body.

  • The Subject and Role fields will both update to display the name of the Rigid Body name.

The LiveLinkController label can only be applied to Rigid Body assets.

Camera Calibration

As noted above, Unreal Engine includes properties that allow you to calibrate a video camera streaming into Unreal Engine. This includes the ability to use a lens encoder with the camera.

Lens Encoder

When using a Lens Encoder or a calibrated Lens in Unreal Engine, use the Lens File Picker settings to select the appropriate Lens File.

A CinePuck is tracked in Motive as a Rigid Body asset. For detailed instructions on creating a , Please see the page. For instructions on pairing the IMU, please see the page.

In Unreal Engine, click the button on the Live Link tab to add a new Live Link source.

Click the Quick Add button and start typing OptiTrack over the menu to activate the search function. Select the OptiTrack Live Link Display from the list of available options.

In the Details pane, click the Add button to add a new component to the camera.

Please see for more information on calibrating cameras and working with lens files in Unreal Engine.

Unreal Engine: OptiTrack InCamera VFX
BaseStation
CinePuck
Camera Lens Calibration Overview in Unreal Engine
Builder pane
IMU Sensor Fusion
rigid body asset
CinePuck mounted via SmallRig NATO rig.
Add a Live Link source in Unreal Engine.
Unreal Engine Properties for the OptiTrack Live Link plug-in.
Select a Live Link Subject in Unreal Engine.
Stream as Camera setting in Unreal Engine.
Searching from the UE Quick Add button.
Camera Details in Unreal Engine: Add a new component.
Properties for a new Live Link Controller component in Unreal Engine.
Live Link Component Camera Role properties in Ureal Engine.