I am using OpenCV to extract frames from a video. It opened sucessfully but failed to capture any frames. Anyone knows what the problem might be? Thanks. I used the codes below, not sure if it helps with anything but just in case it does:

import cv2 
video_path = "input.mp4" 
cap = cv2.VideoCapture(video_path) 
if not cap.isOpened(): 
print("Error: Could not open video.") 
exit() 
while True: 
ret, frame = cap.read()       
if not ret:         
print("Reached the end of the video.")         
break     
cv2.imshow('Video', frame)     
if cv2.waitKey(1) & 0xFF == ord('q'):         
break 
cap.release() 
cv2.destroyAllWindows() 

Tried changing the format to .mov and .mp4. Did not help