OU-MVLP数据预处理

@@OU-MVLP原始数据集预处理中途出现了下面的类型错误，可能是什么原因造成的，有人能解决吗？@AbnerHqC

# JOB 32000 : --START-- Silhouette_015-01-06105
# JOB 32000 : --FINISH-- Contain 52 valid frames. Saved to D:\DataSet\pretreatment\OU-MVLP\Silhouette_015-01\06105.
# JOB 32500 : --START-- Silhouette_015-01-06629
# JOB 32500 : --FINISH-- Contain 72 valid frames. Saved to D:\DataSet\pretreatment\OU-MVLP\Silhouette_015-01\06629.
# JOB 33000 : --START-- Silhouette_015-01-07165
# JOB 33000 : --FINISH-- Contain 52 valid frames. Saved to D:\DataSet\pretreatment\OU-MVLP\Silhouette_015-01\07165.

ERROR OCCUR: PID ##%d##, ERRORTYPE: %s

8745
multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
File "D:\anaconda3\envs\aaa\lib\multiprocessing\pool.py", line 119, in worker
result = (True, func(*args, **kwds))
File "D:\代码复现\GaitSet_cpu_source\pretreatment.py", line 130, in cut_pickle
img = cv2.imread(frame_path)[:, :, 0]
TypeError: 'NoneType' object is not subscriptable
"""