The area beneath the Existing Files options displays additional options that display depending on the file format that you are exporting. This section lists some of the more common file formats and their options.
Acclaim (*.asf, * .amc), Biovision (*.bvh), Motion Analysis (*.htr),
An additional option lets you export position data in either local (based on the location of the immediate parent) or global coordinates (based on the center of the scene). See Motion Analysis .htr format limitations and Acclaim .asf and .amc format limitations for a list of limitations that affect the export of these files.
Motion Analysis (*.trc), Vicon (*.c3d)
Two additional options let you export position data in either local or global coordinates, and mark gaps as valid data.