import cv2
import hashlib
import secrets

def fetch_frame_opencv(url):
    cap = cv2.VideoCapture(url)
    ret, frame = cap.read()
    cap.release()
    if not ret:
        raise ValueError("Failed to fetch frame.")
    return frame

def generate_random_numbers(frame, bit_lengths=[16, 32, 64, 128, 256]):
    _, img_encoded = cv2.imencode('.jpg', frame)
    img_bytes = img_encoded.tobytes()
    entropy = hashlib.sha256(img_bytes).digest()
    # Use secrets.randbits directly
    return {length: secrets.randbits(length) for length in bit_lengths}

url = "http://192.168.0.200/mjpg/video.mjpg"
try:
    frame = fetch_frame_opencv(url)
    random_numbers = generate_random_numbers(frame)
    for length, number in random_numbers.items():
        print(f"{length}-bit random number: {hex(number)}")
except Exception as e:
    print(f"Error: {e}")