It closes after a while ( (-215:Assertion failed) !ssize.empty() in function 'resize)

[abimael-dominguez]

Hello, it works very well, but after a moment it suddenly gets closed. I guess there is something that cannot resize.

---------------------------------------------------------------------------
error                                     Traceback (most recent call last)
<ipython-input-4-bb9cd1c7ef7c> in <module>
     18         success, img = video.read()
     19         success2, bg = oceanVideo.read()
---> 20         bg = resize(bg,ref_img)
     21         if flag==0:
     22                 ref_img = img

<ipython-input-4-bb9cd1c7ef7c> in resize(dst, img)
      7         height = img.shape[0]
      8         dim = (width, height)
----> 9         resized = cv2.resize(dst, dim, interpolation = cv2.INTER_AREA)
     10         return resized
     11 

error: OpenCV(4.2.0) /io/opencv/modules/imgproc/src/resize.cpp:4045: error: (-215:Assertion failed) !ssize.empty() in function 'resize'