Compositing in 3D Space with Action > About the FBX Camera > Importing and Exporting FBX Cameras >

# Export FBX Cameras Settings

Pixels to FBX Units field
  Displays the scaling factor to apply to the exported FBX file to be used in the 3D application. Use the Units box to select the unit of measurement. Editable.

Units box
  Select a unit of measurement to apply to the exported FBX file.

Rotate Axis button
  Enable to rotate the 3D model by 90 degrees on the X-axis so that it is compatible with the target's coordinate system.

Export Axes button
  Enable to export the animated axes present in the Action scene.

Bake Animation button
  Enable to add a keyframe at every frame of the exported FBX camera file.