byte_stuff_web_p.py

import cv2
import csv
import numpy as np

img = cv2.imread("img.png")



data_file = open("data.data", "wb")
csv_file = open("data.csv", "w")
csv_writer = csv.writer(csv_file)


start_byte = 0
for i in range(10):
    retval, buf = cv2.imencode(".webp", 
                           img, 
                           [cv2.IMWRITE_WEBP_QUALITY, 100])
    end_byte = start_byte + len(buf)
    data_file.write(buf)
    csv_writer.writerow([start_byte, end_byte])
    start_byte=end_byte


data_file.close()
csv_file.close()
# read part:

data_file = open("data.data", "rb")
csv_file = open("data.csv", "r")

csv_reader = csv.reader(csv_file)
for (start_byte, end_byte) in csv_reader:
    start_byte, end_byte = int(start_byte), int(end_byte)
    data_file.seek(start_byte)
    buf = data_file.read(end_byte-start_byte)
    img = cv2.imdecode(np.frombuffer(buf, np.uint8), 1)
    print(img)