          The folder of images or video file to load images from
      count: int or ``None``, optional
          If the total frame count is known it can be passed in here which will skip
          analyzing a video file. If the count is not passed in, it will be calculated.
      """
      def __init__(self, folder: str, count: Optional[int] = None):
          logger.debug("Initializing %s: (folder: '%s')", self.__class__.__name__, folder)
          logger.info("[%s DATA]", self.__class__.__name__.upper())
          self._count = count
 
</s> remove         """ makes sure that the frames or faces folder exists
 </s> add         """ Ensure that the frames or faces folder exists and is valid. </s> remove     def __init__(self, arguments):
 </s> add     def __init__(self, arguments: Namespace) -> None: </s> remove         logger.trace("Received frame: (filename: '%s', shape: %s",  # type: ignore
 </s> add         logger.trace("Received frame: (filename: '%s', shape: %s",  # type:ignore[attr-defined] </s> remove             logger.trace("Loading video frame: '%s'", filename)  # type: ignore
 </s> add             logger.trace("Loading video frame: '%s'", filename)  # type:ignore[attr-defined] </s> remove         reader = imageio.get_reader(self._args.input_dir, "ffmpeg")
        for i, frame in enumerate(reader):
 </s> add         reader = imageio.get_reader(self._args.input_dir, "ffmpeg")  # type:ignore[arg-type]
        for i, frame in enumerate(cast(Iterator[np.ndarray], reader)):
        Default: ``None``
          The folder of images or video file to load images from
      count: int or ``None``, optional
          If the total frame count is known it can be passed in here which will skip
          analyzing a video file. If the count is not passed in, it will be calculated.
        Default: ``None``
      """
      def __init__(self, folder: str, count: Optional[int] = None):
          logger.debug("Initializing %s: (folder: '%s')", self.__class__.__name__, folder)
          logger.info("[%s DATA]", self.__class__.__name__.upper())
          self._count = count
keep keep keep add keep keep keep keep keep
 tests:
  - unit test: tools.alignments.media
  - Add mypy test
  - Typing fixes 
tools/alignments/media.py