Since HitFilm supports Maya files I reverse engineered a Maya-file and created this script: http://animestudioscripts.com/temp/ds_file_to_maya.zip
So far it seems to work in HitFilm:
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But since I don't have Maya I can't test it there. If anyone here has Maya or some other 3D software that supports it you're welcome to try.
The script will export points in 3D for all the top layers in the Anime Studio file so you can locate where they are supposed to be in 3D space (on frame 0 at least). These points will be named after the layers but if you have a space in the layer name only the part before the space will show up (atleast in HitFilm)
Like with my Export to After Effects script you'll get problems if you use pan and tilt on the camera at the same time. This is because AS uses local coordinates and other software uses world coordinates (or maybe it was the opposite?). Until I figure out how to compensate for that you can't use both at the same time.
You can choose the scale to export to. The default value is 540 because it seems to work good in HitFilm.