MotionSketch

MotionSketch turns ordinary video into keyframe animation you can edit.

Scrub a clip, mark the frames that matter, and the inference engine solves only those — Blender interpolates everything between them, the same way you would block a shot by hand. From there the take is yours: refine it cumulatively across the whole range, anchor the feet so they stop sliding, lock a limb with IK, then bake to plain keyframes. It retargets onto Unreal Engine 5 (Manny), Mixamo, Auto-Rig Pro, DAZ Genesis and MHX rigs.

There is no black box at the end of it. What lands in your scene is ordinary Blender animation on ordinary channels, on your own rig, ready to be pushed around.