Data Export: FBX

A Motive Body license can export tracking data into FBX files for use in other 3D pipelines. There are two types of FBX files: Binary FBX and ASCII FBX.

Notes for MotionBuilder Users

  • When exporting tracking data onto the MotionBuilder in FBX file format, make sure the exported frame rate is supported in MotionBuilder (Mobu). In Mobu, there is a select set of playback frame rate that's supported, and rate of the exported FBX file must agree in order to playback the data properly.

  • If there is a non-standard frame rate selected that is not supported, the closest supported frame rate is applied.

For more information, please visit Autodesk Motionbuilder's Documentation Support site.

FBX ASCII

Autodesk has discontinued support for FBX ASCII import in MotionBuilder 2018 and above. For alternatives when working in MotionBuilder, please see the Autodesk MotionBuilder: OptiTrack Optical Plugin page.

Exported FBX files in ASCII format can contain reconstructed marker coordinate data as well as 6 Degree of Freedom data for each involved asset depending on the export setting configurations. ASCII files can also be opened and edited using text editor applications.

FBX ASCII Export Options

OptionsDescription

Frame Rate

Number of samples included per every second of exported data.

Start Frame

End Frame

Scale

Apply scaling to the exported tracking data.

Units

Set the unit in exported files.

Use Timecode

Includes timecode.

Export FBX Actors

Includes FBX Actors in the exported file. Actor is a type of asset used in animation applications (e.g. MotionBuilder) to display imported motions and connect to a character. In order to animate exported actors, associated markers will need to be exported as well.

Optical Marker Name Space

Overrides the default name spaces for the optical markers.

Marker Name Separator

Choose ":" or "_" for marker name separator. The name separator will be used to separate the asset name and the corresponding marker name when exporting the data (e.g. AssetName:MarkerLabel or AssetName_MarkerLabel). When exporting to Autodesk Motion Builder, use "_" as the separator.

Markers

Export each marker coordinates.

Unlabeled Markers

Includes unlabeled markers.

Calculated Marker Positions

Export asset's constraint marker positions as the optical marker data.

Interpolated Fingertips

Includes virtual reconstructions at the finger tips. Available only with Skeletons that support finger tracking.

Marker Nulls

Exports locations of each marker.

Export Skeleton Nulls

Rigid Body Nulls

FBX Binary

Binary FBX files are more compact than ASCII FBX files. Reconstructed 3D marker data is not included within this file type, but selected Skeletons are exported by saving corresponding joint angles and segment lengths. For Rigid Bodies, positions and orientations at the defined Rigid Body origin are exported.

FBX Binary Export Options

OptionsDescriptions

Frame Rate

Number of samples included per every second of exported data.

Start Frame

End Frame

Scale

Apply scaling to the exported tracking data.

Units

Sets the unit for exported segment lengths.

Use Timecode

Includes timecode.

Export Skeletons

Skeleton Names

Names of Skeletons that will be exported into the FBX binary file.

Name Separator

Choose ":" or "_" for marker name separator. The name separator will be used to separate the asset name and the corresponding marker name when exporting the data (e.g. AssetName:MarkerLabel or AssetName_MarkerLabel). When exporting to Autodesk Motion Builder, use "_" as the separator.

Rigid Body Nulls

Rigid Body Names

Names of the Rigid Bodies to export into the FBX binary file as 6 DoF nulls.

Marker Nulls

Exports locations of each marker.

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