NameError: name 'VideoCapture' is not defined

The error message "NameError: name 'VideoCapture' is not defined" typically indicates that the VideoCapture class or module has not been imported or initialized properly in the code.

To fix this error, you may need to import the necessary modules or classes from the OpenCV library. For example, you can add the following line at the beginning of your code:

from cv2 import VideoCapture

This will import the VideoCapture class from the cv2 module in OpenCV. Alternatively, you can use the full module name when calling the VideoCapture class:

import cv2
cap = cv2.VideoCapture(0)

This will import the entire cv2 module and then initialize the VideoCapture class to capture video from the default camera.