Retarget BEAT bvh to SMPL fbx

Prerequisite

0. Blender Version == 2.93
1. Blender Add-on : Auto-Rig Pro if you do not have ARP, please purchase here.
2. Blender Add-on : SMPL-X Blender Add-on (300 shape components, 20220623, 310MB) if you do not have SMPL-X, please download here（Registration is needed.）.

Data Description

0. Data should be put in this hierachy:

   BEAT_Dataset
   ├── female
   │   └── FEMALE_ID
   │       └── MOTION_FILES.bvh
   └── male
       └── MALE_ID
           └── MOTION_FILES.bvh  
   

1. FEMALE_IDs are 6-10, 21-30. MALE_IDs are 1-5, 11-20. SMPL-X Blender Add-on is defaultly set to Female, please manually set to Male on SMPL-X Model panel in the sidebar of Blender viewer, if you want to process Male data.
2. Please delete .0 in end of line 430 in 30_katya_1_1_1.bvh, 30_katya_1_2_2.bvh, 30_katya_1_3_3.bvh, 14_zhang_1_2_2.bvh, 14_zhang_1_3_3.bvh before run the processing code.

Processing

0. Install Auto-Rig Pro and SMPL-X for Blender in Blender 2.93.
1. Put remapping index ./beat2smpl/beat2smpl.bmap in the scripts folder of Blender. (ex. In Windows, this folder are in C:\Users\YOUR_NAME\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\auto_rig_pro-master\remap_presets\.)
2. Add fp: StringProperty(subtype="FILE_PATH", default='./smpl.fbx') in line 1125 of __init__.py in SMPL-X Blender Add-on installed path. (ex. In Windows, this folder are in C:\Users\YOUR_NAME\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\smplx_blender_addon\__init__.py.)
3. Read ./beat2smpl/beat2smpl.py into Blender script, and turn on Window/Toggle System Console in Blender for checking the progress of retargeting.
4. Change the gender in both line 3 and 20 in ./beat2smpl/beat2smpl.py, and run the script in Blender.