Traceback when testing the code with another mp4 file

[zhaojianghe16]

Dear friend, Do you know how to fix this? I am using python3. Thank you very much Traceback (most recent call last): File "C:/Users/Alan He/Desktop/Stablization/Video-Stabilization-using-OpenCV-master/video_stabilization.py", line 94, in dx = m[0,2] TypeError: 'NoneType' object is not subscriptable

Process finished with exit code 1