          logger.info("[EXTRACT FACES]")  # Tidy up cli output
          self._check_folder()
          if self._is_legacy:
              self._legacy_check()
          self._export_faces()
  
      def _check_folder(self):
          """ Check that the faces folder doesn't pre-exist and create. """
          err = None
          if not self._faces_dir:
 
</s> remove     @staticmethod
    def get_faces(arguments):
        """ If faces argument is specified, load faces_dir otherwise return None """
        if not hasattr(arguments, "faces_dir") or not arguments.faces_dir:
            return None
        faces = Faces(arguments.faces_dir)
        return faces

 </s> add  </s> remove         rename_mappings = self._build_rename_list()
 </s> add         rename_mappings = sorted([(face["current_filename"], face["original_filename"])
                                  for face in self._faces.file_list_sorted
                                  if face["current_filename"] != face["original_filename"]],
                                 key=lambda x: x[1]) </s> remove         self._faces = faces if faces else Faces(arguments.faces_dir)
 </s> add         kwargs = dict()
        if alignments.version < 2.1:
            # Update headers of faces generated with hash based alignments
            kwargs["alignments"] = alignments
        self._faces = faces if faces else Faces(arguments.faces_dir, **kwargs) </s> remove         face_hashes = self._items.items
        if not face_hashes:
 </s> add         frame_face_indices = self._items.items
        if not frame_face_indices:
        self._saver = ImagesSaver(self._faces_dir, as_bytes=True)
          logger.info("[EXTRACT FACES]")  # Tidy up cli output
          self._check_folder()
          if self._is_legacy:
              self._legacy_check()
        self._saver = ImagesSaver(self._faces_dir, as_bytes=True)
          self._export_faces()
  
      def _check_folder(self):
          """ Check that the faces folder doesn't pre-exist and create. """
          err = None
          if not self._faces_dir:
keep keep keep add keep keep keep keep keep keep
 Update extracted faces to use PNG EXIF data (#1123)

Documentation
  - Update Usage.md, align.rst and image.rst
lib.image.py
  - read_image - Remove hash return, add metadata return
  - Remove read_image_hash functions
  - Add read_image_meta functios
  - Replace encode_image_with_hash with encode_image (to store metadata)
  - Add png meta reading and writing functions
  - Update Image Loaders/Savers to handle metadata rather than hashes
lib.training_data
  - Naming updates to remove references to hashes
lib.align.Alignments
  - Add versioning notes
  - Increment alignments version to 2.1
  - Deprecate hashing lookup functions
  - Replace filter_hashes with filter_faces
lib.align.detected_face
  - DetectedFace
    - Remove hash property
    - Add png header data serializing/deserializing functions
  - Mask
    - Add png header data serializing/deserializing functions
  - add update_legacy_png_header function to update png meta data
lib.cli.args - Deprecate alignments files for training
- plugins.train.trainer
  - Update alignments/mask code to read png header data
- scripts.convert
  - Aligned images folder - read data from png headers
- scripts.extract
  - Write png header information and no longer store hash of face
- tools.alignments
  - remove leftover-faces, merge and update-hashes jobs
  - Update jobs to use png meta data rather than hashes
- tools.manual
  - Update extract code to output png meta data and don't store hashes
  - Perform check on launch that tool is not pointing at a faces folder
tools.mask
  - Update to use png meta data
tools.sort
  - Update to use png meta data 
tools/alignments/jobs.py