Error "AttributeError: 'NoneType' object has no attribute 'shape'"

[daffymarco]

.....\src\video2frame.py", line 31, in
height, width, layers = img.shape
^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'shape'

In file have pathIn and pathOut, what should I put in these fields? I put the path to an empty folder, but I didn't find the code description of what should be put in these variables.

Thanks.