28 lines
847 B
Python
28 lines
847 B
Python
import cv2
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import hashlib
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import secrets
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def fetch_frame_opencv(url):
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cap = cv2.VideoCapture(url)
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ret, frame = cap.read()
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cap.release()
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if not ret:
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raise ValueError("Failed to fetch frame.")
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return frame
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def generate_random_numbers(frame, bit_lengths=[16, 32, 64, 128, 256]):
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_, img_encoded = cv2.imencode('.jpg', frame)
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img_bytes = img_encoded.tobytes()
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entropy = hashlib.sha256(img_bytes).digest()
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# Use secrets.randbits directly
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return {length: secrets.randbits(length) for length in bit_lengths}
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url = "http://192.168.0.200/mjpg/video.mjpg"
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try:
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frame = fetch_frame_opencv(url)
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random_numbers = generate_random_numbers(frame)
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for length, number in random_numbers.items():
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print(f"{length}-bit random number: {hex(number)}")
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except Exception as e:
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print(f"Error: {e}")
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