I need to import multiple BVH files and transfer them onto an existing rig. What do you think would be the best software to accomplish this? I have been looking at Maya and 3DS Max. What would be best or could you please suggest something better.
Thank you for your time
Motionbuilder’s the obvious choice if youre spending megabucks anyways, i’ve had max import bvh to a biped but im not sure how well it would do with a custom rig
Here is a tutorial in French
Do you have your rig in a format that can be loaded into Blender? If you do then there is an addon created by Benjy Cook for the google Summer of Code that can be activated. Tutorials here (seven in all on YouTube):
Blender Motion Capture Addon - Tutorial 1 - Basic Retargeting
Blender Motion Capture Addon - Tutorial 2 - Location Retargeting
Blender Motion Capture Addon - Tutorial 3 - NLA System and Manual Tweaking
etc.
The addon allows you to easily match bone names between your rig and the BVH file.
But of course you must have a rig that can be loaded into Blender.
cheers,
gryff 
Resurrection!