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I have a BVH file from my Mocap suit that contains 2892 frames, where each frame is a keyframe. The animation runs very slow at about 1/3 speed.

My questions are:

  1. How can I speed up my animation by removing about 2/3 of keyframes? I have found out that I can open NLA editor and change timing from 0 - 2892 frames to 0 - 900 frames and it will do what I need, yet it disallows all future keyframe edits.

  2. How can I optimize my keyframes? Many of these keyframes are not necessary and can be dealt with interpolation.

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You can use the Simplify Curves addon, which is already with your Blender.

  • Enable the Addon;

  • Switch to Graph Editor, select all curves that you want to simplify, press Space and search for Simplify Curves. Then press F6 to tweak the Error theshold.

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To be more accurate, you have to remove those unneeded "interpolated" keys manually, which needs time.

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