Rendered animation doesn't match up with viewport?

[Opel Manta 400]

I ran into an oddly specific problem: the animation (a simple walking cycle) looks fine when previewing in viewport, but the rendered animation (walkingCycleTest.mp4) looks like a jumbled, incoherent mess. If I render each frame individually as an image and stitch those together in a video editor (walkingCycleTest_StitchedTogether.mp4), it looks as intended.

Here[ferhr-my.sharepoint.com] 's the .blend, renders and textures, any help is appreciated.

Edit: I forgot to mention that the .blend uses the Wiggle bones addon to generate motion on Sonic's quills, ears and tail. So the animation should still look the same without the addon, minus wiggly bones. Also the holes in Sonic's model are a side effect of reducing the polycount (by unsubdividing), so nothing to worry about.

[Pte Jack]

Did you do the animation before or after the decimate (unsubdivide)? And did you apply the modifier or leave it in place?

[Opel Manta 400]

Originally posted by Pte Jack:

Did you do the animation before or after the decimate (unsubdivide)? And did you apply the modifier or leave it in place?

I did the animation after unsubdividing. Also I didn't apply it as a modifier, but from the edit mode, Edge -> Un-subdivide on each of the model parts. (The modifiers wouldn't apply on one of the model parts because it has shape keys, so for the sake of consistency I unsubdivided all of the models from Edit mode instead of with modifiers, but that's besides the point.)

[Pte Jack]

I don't see a problem when I render as a MP4 or MKV, the animation is sound (not like the stretchy MP4 you included in your files). This is my render directly from your Blend File:

https://i.imgur.com/trFMpYE.gif

You can tell it's not your original MP4 because I don't have jiggles loaded, therefore my quills don't move.

[Opel Manta 400]

Originally posted by Pte Jack:

I don't see a problem when I render as a MP4 or MKV, the animation is sound (not like the stretchy MP4 you included in your files). This is my render directly from your Blend File:

https://i.imgur.com/trFMpYE.gif

You can tell it's not your original MP4 because I don't have jiggles loaded, therefore my quills don't move.

Thanks for the input! I've just restored default preferences and now it works.

[Pte Jack]

It could be the rendering of those Jiggles. I believe that add-on is still in the development stages (if I remember correctly or from the last time I looked at it) and the render engine just doesn't know what to do with the jiggle in the armature yet.

Edit: That said, it could just be eevee, have you tried in Cycles?

[Opel Manta 400]

I've just tried rendering in Cycles and Eevee with and without Wiggle bones, and the janky animation appeared only when Wiggle bones was enabled.

[Pte Jack]

Ok, then that confirms that it is the Jiggle then. You might want to check for a setting in the add-on's options or send a bug report to the dev so they know they have a problem in rendering. Also, Apparently the Bake Animations button is supposed to be back, but I don't see it in my version.