MimeType is None for BMP files

[ITS-Luc]

Hello,

When trying to use this engine with .bmp file, i get the following error :

2024-11-19 08:55:02 thumbor:ERROR ERROR: Traceback (most recent call last):
  File "/usr/local/lib/python3.12/site-packages/thumbor/handlers/__init__.py", line 214, in get_image
    result = await self._fetch(self.context.request.image_url)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/thumbor/handlers/__init__.py", line 987, in _fetch
    raise fetch_result.exception
  File "/usr/local/lib/python3.12/site-packages/thumbor/handlers/__init__.py", line 955, in _fetch
    self.context.request.engine.load(fetch_result.buffer, extension)
  File "/usr/local/lib/python3.12/site-packages/thumbor_video_engine/engines/video.py", line 89, in load
    self.engine = self.get_engine(buffer, extension)
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/thumbor_video_engine/engines/video.py", line 83, in get_engine
    elif mime.startswith('video/'):
         ^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'startswith'
2024-11-19 08:55:02 thumbor:ERROR [BaseHandler] get_image failed for url `default-bucket/e8c48d06-5c7e-4998-a9f0-75ec1f99ca02.bmp`. error: `'NoneType' object has no attribute 'startswith'`
2024-11-19 08:55:02 tornado.access:ERROR 500 GET /VPZcVOIm_bBHkM_JiKktKf91UlZAa87i2XWcoLLlMPY=/default-bucket/e8c48d06-5c7e-4998-a9f0-75ec1f99ca02.bmp (172.18.0.1) 53.39ms

i think it can be fixed easily, would it be possible to address this issue ?