Bake two NLA strips in a single animation

Question

i'm getting mad with this. I'm trying bake a single animation from different NLA strips, but i can't do it. I imported a character with a skeleton and i added some animations with a retargeting from mixamo. Now i have to mix 2 of those animations into one: i have an "injured-idle" animation and a "waving" animation and i want to bake those into a "injured-waving". It works, i fused the two animation in the NLA editor, and i got the action that i want. But i can't bake it into one single animation, because when i try to bake action: Blender gives me this error:

  File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\startup\bl_operators\anim.py", line 282, in execute
    actions = anim_utils.bake_action_objects(
  File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\bpy_extras\anim_utils.py", line 80, in bake_action_objects
    return iter.send(None)
  File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\bpy_extras\anim_utils.py", line 111, in bake_action_objects_iter
    yield tuple(iter.send(None) for iter in iter_all)
  File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\bpy_extras\anim_utils.py", line 111, in <genexpr>
    yield tuple(iter.send(None) for iter in iter_all)
  File "C:\Program Files\Blender Foundation\Blender 3.1\3.1\scripts\modules\bpy_extras\anim_utils.py", line 281, in bake_action_iter
    pbone.keyframe_insert("location", index=-1, frame=f, group=name)
RuntimeError: Error: Could not insert keyframe due to zero NLA influence or base value


location: <unknown location>:-1

Help me please, i can't figure out what am i doing wrong. Here is the link for the project: https://pasteall.org/blend/36f43fb650724e2ca7db8b4899b6fd32

Answer 1

The problem is that one of your clips in the NLA editor is too short in frames. I tried to add keyframes in frame 60, but one of my clips was just 55 frames long. That generates this problem.

If you have the same error, do the following: Go to the NLA editor

• Click once in the NLA editor to make sure it's active and press "N" to toggle the sidebar.

• Select a clip that is too short. In the sidebar, the options of that clip pops-up.

• Edit the "End Frame"value in the "Action Extents" section.

• Repeat this for all clips that are too short.

Now you can add keyframes again