well, bvh is a pretty unorganized thing IMHO. for example, there is no hierarchy, and no world center. So you have to correct the positions of the bones of each frame to make it walk on place.
I guess you have to fiddle a LOT until a downloaded bvh file works and looks nice. And note: every tool that exports bvh may use its own special implementation of it.
Personally I'd find it much easier to scale the frames of some videos and then align the bones manually in something like pacemaker, fragmotion or CFX. It definitely wouldn't take longer than manually animating something right from my memory.
I guess you have to fiddle a LOT until a downloaded bvh file works and looks nice. And note: every tool that exports bvh may use its own special implementation of it.
Personally I'd find it much easier to scale the frames of some videos and then align the bones manually in something like pacemaker, fragmotion or CFX. It definitely wouldn't take longer than manually animating something right from my memory.