No registered converter was able to extract a C++ pointer to type char from this Python object of type bytes

[baiqilin1991]

when I run dense_flow/tools/extract_flow.py

Traceback (most recent call last):
File "extract_flow.py", line 71, in
flow_frames = f.extract_flow(frame_list)
File "extract_flow.py", line 23, in extract_flow
rst = self._et.extract_flow([x.tostring() for x in frame_list], frame_size[1], frame_size[0])
TypeError: No registered converter was able to extract a C++ pointer to type char from this Python object of type bytes

can any one help me?

[baiqilin1991]

@yjxiong