unknown file extension: .mp4

[aloe8475]

Hi - love this package.

Just wondering why i'm getting the error: "unknown file extension: .mp4"
it's also happening for all other file formats i'm inputting.

Any ideas?

Specifically, the error occurs as follows:

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
~\anaconda3\lib\site-packages\PIL\Image.py in save(self, fp, format, **params)
   2081             try:
-> 2082                 format = EXTENSION[ext]
   2083             except KeyError:

KeyError: '.mp4'

During handling of the above exception, another exception occurred:

ValueError                                Traceback (most recent call last)
<ipython-input-114-513938de0b62> in <module>
     64 
     65 animation = camera.animate()
---> 66 animation.save(r'C:\Users\61424\Documents\GitHub\CODE\Data\Figures\Functional Connectivity\'animation.mp4')

~\anaconda3\lib\site-packages\matplotlib\animation.py in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs, progress_callback)
   1154                             progress_callback(frame_number, total_frames)
   1155                             frame_number += 1
-> 1156                     writer.grab_frame(**savefig_kwargs)
   1157 
   1158         # Reconnect signal for first draw if necessary

~\anaconda3\lib\contextlib.py in __exit__(self, type, value, traceback)
    117         if type is None:
    118             try:
--> 119                 next(self.gen)
    120             except StopIteration:
    121                 return False

~\anaconda3\lib\site-packages\matplotlib\animation.py in saving(self, fig, outfile, dpi, *args, **kwargs)
    230             yield self
    231         finally:
--> 232             self.finish()
    233 
    234 

\anaconda3\lib\site-packages\matplotlib\animation.py in finish(self)
    575         self._frames[0].save(
    576             self._outfile, save_all=True, append_images=self._frames[1:],
--> 577             duration=int(1000 / self.fps), loop=0)
    578 
    579 

~\anaconda3\lib\site-packages\PIL\Image.py in save(self, fp, format, **params)
   2082                 format = EXTENSION[ext]
   2083             except KeyError:
-> 2084                 raise ValueError("unknown file extension: {}".format(ext))
   2085 
   2086         if format.upper() not in SAVE:`
ValueError: unknown file extension: .mp4

```

[loomcode]

You're having this problem because MP4 is not a format supported by pillow, the package being used to save the file. Simply put, the example given where save is called does not work. If you're okay with an animated gif and have imagemagic you can use:

anim.save('/home/blws1/Desktop/animated_gif.gif', writer='imagemagick').

A different writer might handle mp4.