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v3.1
v3.1
  • OptiTrack Documentation
  • WHAT'S NEW
    • What's New in Motive 3.1
  • 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
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        • 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
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        • Transforming Coordinate System: Global to Local
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  • MOTIVE
    • Installation and License Activation
    • Motive Basics
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      • Aligning Rigid Body Pivot Point with a Replicated 3D Model
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      • Data Types
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      • Data Export: BVH
      • Data Export: C3D
      • Data Export: CSV
      • Data Export: FBX
      • Data Export: TRC
    • Data Streaming
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  • MOTIVE UI PANES
    • Settings
      • Settings: General
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      • Constraints XML Files
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  • PLUGINS
    • OptiTrack Blender Plugin
      • OptiTrack Blender Plugin
    • OptiTrack Unreal Engine Plugin
      • Unreal Engine: OptiTrack Streaming Client 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
    • 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
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      • Houdini 19 Integration
  • ACTIVE COMPONENTS
    • Active Components Hardware
      • Active Puck
      • CinePuck
      • BaseStation
      • Information for Assembling the Active Tags
      • Manus Glove Setup
    • Configuration
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      • Active Component Firmware Compatibility
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      • 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: Using the OptiTrack Streaming Client Plugin
        • 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
    • 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
  • CSV Export
  • Coordinate Systems
  • Physical Markers vs Marker Constraints During Occlusion
  • CSV Header
  • Force Plate Data / Analog Data

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  1. MOTIVE
  2. Data Export

Data Export: CSV

CSV Export

Captured tracking data can be exported in Comma Separated Values (CSV) format. This file format uses comma delimiters to separate multiple values in each row, which can be imported by spreadsheet software or a programming script. Depending on which data export options are enabled, exported CSV files can contain marker data, and data for Rigid Bodies, Trained Markersets, and/or Skeletons. Data for force plate, NI-DAQs, and other devices will export to separate files if these devices are included in the Take.

CSV export options are listed in the following charts:

General Export Options

Option
Description

Frame Rate

Number of samples included per second of exported data.

Start Frame

Start frame of the exported data. Set to one of the following:

  • The recorded first frame of the exported Take (the default option).

  • Custom to enter a specific frame number.

End Frame

End frame of the exported data. Set to one of the following:

  • The recorded end frame of the exported Take (the default option).

  • Custom to enter a specific frame number.

Scale

Apply scaling to the exported tracking data.

Units

Set the measurement units to use for exported data.

Axis Convention

Sets the axis convention on exported data. This can be set to a custom convention or select preset conventions for Entertainment or Measurement.

X Axis Y Axis Z Axis

Allows customization of the axis convention in the exported file by determining which positional data to be included in the corresponding data set.

CSV Export Options

CSV Options
Data Included When Enabled

Header information

Markers

X/Y/Z reconstructed 3D positions for each marker in exported CSV files.

Unlabeled Markers

Includes tracking data of all of the unlabeled makers to the exported CSV file along with other labeled markers. To view only the labeled marker data, turn off this export setting.

Rigid Body Bones

The exported CSV file will contain 6 Degrees of Freedom (6 DoF) data for each rigid body from the Take. This includes orientations (pitch, roll, and yaw) in the chosen rotation type as well as 3D positions (x,y,z) of the rigid body center.

Rigid Body Constraints

3D position data for the location of each Marker Constraint of rigid body assets. This is distinct from the actual marker location. Compared to the positions of the raw marker positions included within the Markers columns, the Rigid Body Constraints show the solved positions of the markers as affected by the rigid body tracking but not affected by occlusions.

Skeleton and Markerset Bones

The exported CSV files will include 6 DoF data for each bone segment of skeletons and trained markersets in exported Takes. 6 DoF data contain orientations (pitch, roll, and yaw) in the chosen rotation type, and also 3D positions (x,y,z) for the center of the bone. All skeleton and markerset assets must be solved to export this data.

Bone Constraints

3D position data for the location of each Marker Constraint of bone segments in skeleton and trained markerset assets. Compared to the real marker positions included within the Markers columns, the Bone Markers show the solved positions of the markers as affected by the skeleton tracking but not affected by occlusions.

Exclude Fingers

Exported skeletons will not include the fingers, if they are tracked in the Take file.

Asset Hip Name

When selected, the hip bone data is labeled as Asset_Name:Asset_Name (e.g., Skeleton:Skeleton). When unselected, the exported data will use the classic Motive naming convention of Asset_Name:Hip (e.g., Skeleton:Hip).

Rotation Type

Rotation type determines whether Quaternion or Euler Angles are used for orientation convention in exported CSV files. For Euler rotation, right-handed coordinate system is used and all different orders (XYZ, XZY, YXZ, YZX, ZXY, ZYX) of elemental rotation are available. More specifically, the XYZ order indicates pitch is degree about the X axis, yaw is degree about the Y axis, and roll is degree about the Z axis.

This option determines whether exported data will be based on world (global) or local coordinate systems.

Device Data

Exports separate CSV files for recorded device data. This includes force plate data and analog data from NI-DAQ devices. A CSV file is exported for each device included in the Take.

Coordinate Systems

Coordinates for exported data are either global to the volume or local to the asset.

Global or World Coordinates

Local Coordinates

Defines the bone position and orientation in respect to the coordinate system of the parent bone.

In a skeleton, the hip is always the top-most parent of the segment hierarchy.

Physical Markers vs Marker Constraints During Occlusion

In the CSV file, Rigid Body markers have a physical marker column and a Marker Constraints column.

When a marker is occluded in Motive, the Marker Constraints will display the solved position for where the marker should be in the CSV file. The actual physical marker will display a blank cell or null value since Motive cannot account for its actual location due to its occlusion.

CSV Header

When the header is disabled, this information is excluded from the CSV files. Instead, the file will have frame IDs in the first column, time data on the second column, and the corresponding mocap data in the remaining columns.

CSV Headers

Row
What Information is Displayed

1st row

General information about the Take and export settings: Format version of the CSV export, name of the TAK file, the captured frame rate, the export frame rate, capture start time, capture start frame, number of total frames, total exported frames, rotation type, length units, and coordinate space type.

2nd row

Empty

3rd row

4th row

Includes marker or asset labels for each corresponding data set.

5th row

Displays marker or asset ID.

6th and 7th rows

Shows which data is included in the column: rotation or position and orientation on X/Y/Z.

TIP: Occlusion in the marker data

When there is an occlusion of a marker, the CSV file will contain blank cells, which can interfere when running a script to process the CSV data.

We recommend optimizing the system setup to reduce occlusions. To omit unnecessary frame ranges with frequent marker occlusions, select the frame range with the most complete tracking results.

Force Plate Data / Analog Data

Since device data is usually sampled at a higher rate than the camera system, the camera samples are collected at the center of the corresponding device data samples that were collected. For example, if the device data has 9 sub-frames for each camera frame sample, the camera tracking data will be recorded at every 5th frame of device data.

  • Force Plate Data: Each of the force plate CSV files will contain basic properties such as platform dimensions and mechanical-to-electrical center offset values. The mocap frame number, force plate sample number, forces (Fx/Fy/Fz), moments (Mx, My, Mz), and location of the center of pressure (Cx, Cy, Cz) will be listed below the header.

  • Analog Data: Each of the analog data CSV files contains analog voltages from each configured channel.

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The start of the working range (or scope range) as configured under the in the .

The end of the working range (or scope range) as configured under the in the .

Detailed information about capture data is included as a header in exported CSV files. See for specifics.

Use

Defines the position and orientation in respect to the global coordinate system of the calibrated capture volume. The global coordinate system is the origin of the ground plane, set with a calibration square during the process.

Local coordinate axes can be set to visible from or in the . The Bone rotation values in the Local coordinate space can be used to roughly represent the joint angles, however, for precise analysis, joint angles should be computed through a biomechanical analysis software using the exported capture data (C3D).

Rigid Body markers, trained markerset markers and Skeleton bone markers are referred to as . They appear as transparent spheres within a Rigid Body, or a Skeleton, and each sphere reflect the position that a Rigid Body, or a Skeleton, expects to find a 3D marker. When the asset definitions are created, it is assumed that the markers are in fixed positions relative to one another and that these relative positions do not shift over the course of capture.

Displays which data type is listed in each corresponding column. Data types include raw marker, Rigid Body, Rigid Body marker, bone, bone marker, or unlabeled marker. Read more about .

Another solution is to use to interpolate missing trajectories in post-processing.

For Takes containing force plates ( or ) or data acquisition () devices, additional CSV files are exported for each connected device. For example, if you have two force plates and a NI-DAQ device in the setup, a total 4 CSV files will be created when you export the tracking data from Motive. Each of the exported CSV files will contain basic properties and settings at its header, including device information and sample counts. Also, mocap frame rate to device sampling rate ratio is included since force plate and analog data are sampled at higher sampling rates.

Calibration
Application Settings
skeleton properties
Fill Gaps
AMTI
Bertec
NI-DAQ
Control Deck
Graph
View pane
Control Deck
Graph
View pane
CSV Header
World
Coordinates
Marker
Constraints
Marker Types
Tracking data export dialogue window in Motive. CSV export is selected and corresponding options are displayed.
How Rigid Body Markers and Markers appear in a CSV file.