python-3.x - Magic的返回值：HEIC图像情况下的JPEG图像数据

Question

疑点一：对于HEIC图片，Magic提供的返回值为JPEG。有人可以帮我解释一下吗？疑问 2：当支持的文件格式 .HEIC 不存在时，为什么 cv2.imread 会读取图像？另外，如果支持 cv2.imread，为什么不支持 cv2.imwrite？

import cv2
import os
from pathlib import Path
import magic

path_of_directory = str(Path(os.getcwd()).parent) + '/images'

images = os.listdir(path_of_directory)

for image in images:
    try:
        path = str(Path(os.getcwd()).parent) + '/images/' + image
        write_path = str(Path(os.getcwd()).parent) + '/image_write/' + image
        print("image is {}".format(image))
        image_mat = cv2.imread(path)
        print("shape: {}".format(image_mat.shape))
        mime = magic.Magic(mime=True)
        mime_type = mime.from_file(path)
        print("mime_type: {}".format(mime_type))
        cv2.imwrite(write_path, image_mat)
        return_value = cv2.haveImageReader(path)
        print("opencv will read the image: {}".format(return_value))

    except Exception as e:
        print("Exception occurred: {}".format(e))