v1.4
Usage: download .zip files and unpack in any folder. Launch W3MayaAnimUtil.exe.
Open GeraltLambertShani_RootMotion.mb in Maya 2020.
Drop W3AnimUtils_shelves.mel into Maya viewport to install my script shelves on current tab.
Video HowTo (demonstrates usage of the program, though a bit old): [Witcher 3][ANIMATIONS] HOWTO: Editing motionExtraction + retargeting in MAYA
Updates: Added option to split animset into separate jsons. Fixed motion rotation handling (Y-up scene is recommend for default settings).
Maya stuff (scene) updates: Now scene contains 3 actors colored with textures! Geralt + 2 swords attached; Lambert; Shani + 2 swords attached. Their meshes are grouped and can be easily hidden in Outliner. To set up textures download them (link below), unpack and make Repath to this folder with "search in subdirs" option in Maya->Windows->General Editors->File path editor.
W3MayaAnimUtil v1.4 win_x64
Maya scene files
Maya texture files