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I try to flip my keyframes like in this tutorial.

I do everything exactly like in the video, but it fails.

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  1. Select all bones from armature.
  2. Set timeline frame to 80
  3. Select all keyframes from frame 1
  4. Click on copy symbol in dope sheet - action editor
  5. Click on paste symbol in dope sheet - action editor

enter image description here

Result:

result (very weird bone positions)

What am I doing wrong? I just try to flip the keyframes like in the video. The bones are named with the naming convention name.L and name.R.

I was already reading many same questions, but there is no working solution.

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2 Answers 2

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Something weird is going on, but you can solve it by selecting in edit mode all the .L bones, delete them, then select all the .R bones, Shift+D to duplicate, Esc not to move them, Shift+C set the cursor to center, make the cursor pivot point, Ctrl+M X to mirror the bones on the X axis, Then Armature - Flip Names.

Everything now works as expected.

The reverse (L-R) of this whole operation doesn't work!

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  • $\begingroup$ If I do this then all my inverse kinematic setup and weight painting gets lost $\endgroup$
    – Black
    Commented Nov 22, 2017 at 18:19
  • $\begingroup$ No, everything remains, as the "flip names" functions is intelligent and the mirror copies constraints also. Try it on a copy file. The only thing that you'll have to redo is the animation (the single pose, in fact) as the "weird" thing affects it also. $\endgroup$
    – josh sanfelici
    Commented Nov 22, 2017 at 20:51
  • $\begingroup$ But I just tried it with the exact steps from you and the inverse kinematic is lost :/ $\endgroup$
    – Black
    Commented Nov 22, 2017 at 21:38
  • $\begingroup$ Try inverting L and R $\endgroup$
    – josh sanfelici
    Commented Nov 22, 2017 at 23:31
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If I understand correctly what you're asking, this is an animation problem, not a rigging problem.

It looks like the rollMain.R bone has rotation data only in the x channel (the y and z channels have been cleared), but rollMain.L has keys in all three (x, y, and z rotation channels). When a situation like this comes up, the x rotation data is copied into all three channels on the 'mirror to' bone. The fix is to do this: - Clear Single Keyframes on the y and z rotation channels for rollMain.L - make sure auto key is turned off - set the y and z rotation channels to '0'

This problem always comes up when copying single-channel data to a bone where all three channels have keys already set (four channels in the case of quaternion rotation). Blender gets confused and puts the single channel data into all channels.

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