Ok… I can’t find an answer to this problem directly anywhere. Not even close. I will try here 
The goal is to automatically edit the entire animation. What I would change frame by frame:
- Save start pose of ik hand chain bones.
- Move ik hand root to head possition
- Move IK hand gun to where it was before
- Move hands ik bones to hands FK bones.
Can I permanently do that with anim modifiers (from what I saw they have read-only functions and the possibility to write notifications, curves and markers.
Or control rig? but it’s kind-of post-process to animation. so no idea how to use it mass edit animations.
external tools? scripts? how : (
Any direction or link to a tutorial would be most appreciated.