Joint not found: Conversion from fbx@blender to bvh (via blender) then to Deep_Mimic via BvhToDeepMimic

[rohit-kumar-j]

Steps to reproduce the error:

1. Installed blender sudo apt install blender
2. Imported .fbx file from mixamo.com
3. Exported .bvh from blender
4. Tried to run this: (script.py)

# Imports
# ===========================================================================

import json
import os
from os import listdir
from os.path import isfile, join
from bvhtomimic import BvhConverter

converter = BvhConverter("./Settings/settings.json")
converter.convertBvhFile("/home/rkj/Work/BvhToDeepMimic/input/OG_Rig.bvh", loop=False)

5. Produced Error:

rkj@Strix:~/Work/BvhToDeepMimic$ python3 -m script
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/local/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/rkj/Work/BvhToDeepMimic/script.py", line 11, in <module>
    converter.convertBvhFile("/home/rkj/Work/BvhToDeepMimic/input/OG_Rig.bvh", loop=False)
  File "/home/rkj/Work/BvhToDeepMimic/bvhtomimic.py", line 13, in convertBvhFile
    jointHandler = BvhJointHandler(mocap, settingsPath=self.setting_path)
  File "/home/rkj/Work/BvhToDeepMimic/bvhtodeepmimic/bvh_joint_handler.py", line 40, in __init__
    rotationChannelNames,
  File "/home/rkj/Work/BvhToDeepMimic/bvhtodeepmimic/bvh_joint.py", line 17, in __init__
    self.offset = np.array(mocap.joint_offset(self.name))
  File "/home/rkj/.local/lib/python3.6/site-packages/bvh.py", line 129, in joint_offset
    joint = self.get_joint(name)
  File "/home/rkj/.local/lib/python3.6/site-packages/bvh.py", line 126, in get_joint
    raise LookupError('joint not found')
LookupError: joint not found

Desktop (please complete the following information):

rkj@Strix:~$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04.2 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.2 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal

Additional context
Refer #13