Quote - You need to try to find out what frame rate the bvh was recorded at and adjust your timeline accordingly (stretch or squeeze the keyframes)  or just try a few settings on frame rate until it looks good , then use that for your conversion factor

30 fps is typical video , 24 fps was typical film
15 fps works fine except for high speed movement and may be ok with a motion blur effect .

Frame rate on both is suppose be 15fps but when I opened them in Life forms (my new favorite tool) I found the first was 24FPS and the other 30 FPS.

I was able to use Lifeforms to match the desired speed.

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