title: Magic's return value: JPEG image data in case of HEIC image
body: <p>Doubt 1: For HEIC images, the return value provided by Magic is JPEG. Can someone help me with the explanation? 
  Doubt 2: Why is cv2.imread reading the images when in the supported file formats .HEIC is not present? Also, if there's support for cv2.imread, why is there no support for cv2.imwrite?</p>
  
  <pre><code>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))
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/j4qar.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/j4qar.png" alt="enter image description here"></a></p>