How to properly decode the image from encoded image text from a live ANPR Camera stream?

Question

I have an ANPR HIKVision Parking Camera that detects vehicles and read their details such as Vehicle Registration Number, Vehicle Color, Vehicle Direction and Vehicle Type, and it also takes a snapshot of Vehicle Registration Number Plate. I am unable to decode the image which I get through ANPR Camera.

I have a code written that reads all of the information correctly. For the encoded image data which was coming from the live ANPR stream, I decided to store the data in a text file using the following code:

for line in response.iter_lines():
    if line:
        if 'Content-Type: image/jpeg' in str(line):
            with open("vehicle_image.txt", "ab") as f:
                print("Writing Image Text Line to File...")
                f.write(line)

It successfully write all of the image data in a vehicle_image.txt file. And I wrote another script file to parse and decode the data. The code is below:

import re
from PIL import Image
from io import BytesIO

def extract_image_data(file_path):
    with open(file_path, 'rb') as file:
        binary_data = file.read()

    # Find start and end markers
    start_marker = b'Content-Length: 6215'
    end_marker = b'--boundary'

    start_index = binary_data.find(start_marker)
    end_index = binary_data.find(end_marker)

    if start_index == -1 or end_index == -1:
        raise ValueError("Markers not found in the file")

    # Extract image data
    image_data = binary_data[start_index:end_index]

    return image_data

def create_image_from_data(image_data):
    # Create PIL Image object from image data
    image = Image.open(BytesIO(image_data))
    return image

if __name__ == "__main__":
    file_path = "vehicle_image.txt"

    try:
        image_data = extract_image_data(file_path)
        image = create_image_from_data(image_data)

        # Save the image as a JPEG file
        image.save("output.jpg")

        print("Image saved as output.jpg")

    except Exception as e:
        print("An error occurred:", e)

Now when I run the above Script file, I get the following error:

An error occurred: cannot identify image file <_io.BytesIO object at 0x00000196112225E0>

Can anyone tell me what's wrong?