[Python] How to load a video in opencv(python)

I am a begginer in OpenCV and Python. I tried to load a video and displaying it using code given below:

import cv2
cap = cv2.VideoCapture('G:\3d scanner\2.mmv')
while(1):
_ , img2=cap.read()
cv2.namedWindow('video',cv2.WINDOW_NORMAL)
cv2.imshow('video',img2)
k=cv2.waitKey(1) & 0xFF
if k==27:
break
cap.release()
cv2.destroyAllWindows()


But it showing the following error:

OpenCV Error: Assertion failed (size.width>0 && size.height>0) in cv::imshow, file ..\..\..\..\opencv\modules\highgui\src\window.cpp, line 261
File "test3.py", line 8, in <module>
cv2.imshow('video',img2)
cv2.error: ..\..\..\..\opencv\modules\highgui\src\window.cpp:261: error: (-215) size.width>0 && size.height>0 in function cv::imshow


There are previous questions on this site regarding this issue but the answers given were using cv library but not cv2.

Any idea of what is wrong in this?

Continue reading...