Project: Blender Extensions
Tracker: Py Scripts Release
Script name: io_anim_bvh
Wiki page: http://wiki.blender.org/index.php/Extensions:2.6/Py/Scripts/Import-Export/MotionCapture_BVH
Author(s): Campbell Barton
Category: Import Export
The BVH importer allows the conversion from the BVH coordinate frame to Blender's coordinate frame. For example, Blender uses Z=up, whereas a lot of BVH files use Y=up. However, the BVH exporter does not have such a coordinate frame transformation option, and BVH files are always written in Blender's coordinate frame.
The current state of things means that you cannot load a BVH, edit it in Blender, then save it again, while keeping the coordinate frame of the BVH intact (except for the rare case that BVH and Blender share coordinate systems). Please extend the BVH exporter with a coordinate transformation choice, so that this workflow becomes possible.