I have also tried animation and have successfully placed the Audio2Face animation in Blender:
While it’s true that in Audio2Face you can export the animation as a usdskel, and then import it into Blender via a .USD model, Blender still doesn’t support importing only the UsdSkel animation.
Because of this, you have to go through an additional process in Omniverse Create, which is to remove the extra SkelAnimation from the tutorial you’ve shown, and change the Animation Source. (This step is from “Exporting to Unity using Blendshapes within Omniverse Audio2Face” video, From 3:35 to 5:32)
Exporting to Unity using Blendshapes within Omniverse Audio2Face
Currently it is only possible to import SkelAnimation animations into Blender with a 3D Model together. If you look in the Blender Connector documentation, it says that it is currently not possible to export “Absolute Shape Keys”. I’ve tried to import .USD files containing only the SkelAnimation, but they don’t import anything in Blender.
(Omniverse / Blender Manual — Omniverse Connect documentation
In my experience I can tell you that it is much easier to import the animation as JSON and not as SkelAnimation.
First, you need a model that has the Audio2Face Blendshapes in order to export them as JSON. That model is the “Blue Mark” that is in the Omniverse folder, named as “male_bs_46.usd”. The following tutorial explains it Batch Audio Process Overview in Omniverse Audio2Face - From 0:32 to 2:00
Next, you need a Script to import the JSON file into your 3D Model.
The tutorial to do it is this: (Gina's Mum character test process - YouTube) - Starts at 14:10
The script used in the tutorial is this: Link of the Script
You must make a small modification to the script to make it work in Blender: In line number 48, in the “bs_limit = 68” part, you must change the number to the number of Blendshapes your model has. By default it is 46. It should be like this: bs_limit = 46
The script will load a small window, and to use it, you must:
Go to Object Mode in Blender > Select the Face Mesh of the Model with the Blendshapes > Go to the Addon window, and click on “Create Animation” > Load the JSON