This is what exception....

[linzhi]

Code is:

from moviepy.editor import *

clip = VideoFileClip("dog.mp4").subclip(1, 10)

Traceback (most recent call last):
  File "test.py", line 4, in <module>
    from moviepy.editor import *
  File "/usr/local/lib/python2.7/site-packages/moviepy/editor.py", line 22, in <module>
    from .video.io.VideoFileClip import VideoFileClip
  File "/usr/local/lib/python2.7/site-packages/moviepy/video/io/VideoFileClip.py", line 3, in <module>
    from moviepy.video.VideoClip import VideoClip
  File "/usr/local/lib/python2.7/site-packages/moviepy/video/VideoClip.py", line 11, in <module>
    import tempfile
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/tempfile.py", line 32, in <module>
    import io as _io
  File "/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/io.py", line 51, in <module>
    import _io
ImportError: dlopen(/usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so, 2): Symbol not found: __PyCodecInfo_GetIncrementalDecoder
  Referenced from: /usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so
  Expected in: flat namespace
 in /usr/local/Cellar/python/2.7.13/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so

[ghost]

Linzhi,
Are you getting this with other python apps? It looks like an issue with your python installation.

Maybe try something like the following to see if you get the same error:

import tempfile

[linzhi]

This exception has resolved, But....A new exception happened

[MoviePy] Building file dog.gif with imageio
  0%|                                                                                                                                                 | 0/51 [00:00<?, ?it/s]
Traceback (most recent call last):
  File "test.py", line 7, in <module>
    clip.write_gif("dog.gif")
  File "<decorator-gen-56>", line 2, in write_gif
  File "/usr/local/lib/python2.7/site-packages/moviepy/decorators.py", line 54, in requires_duration
    return f(clip, *a, **k)
  File "<decorator-gen-55>", line 2, in write_gif
  File "/usr/local/lib/python2.7/site-packages/moviepy/decorators.py", line 22, in convert_masks_to_RGB
    return f(clip, *a, **k)
  File "/usr/local/lib/python2.7/site-packages/moviepy/video/VideoClip.py", line 461, in write_gif
    verbose=verbose, colors=colors)
  File "/usr/local/lib/python2.7/site-packages/moviepy/video/io/gif_writers.py", line 291, in write_gif_with_image_io
    writer.append_data(frame)
  File "/usr/local/lib/python2.7/site-packages/imageio/core/format.py", line 481, in append_data
    return self._append_data(im, total_meta)
  File "/usr/local/lib/python2.7/site-packages/imageio/plugins/pillowmulti.py", line 101, in _append_data
    self._writer.add_image(im, duration, dispose)
  File "/usr/local/lib/python2.7/site-packages/imageio/plugins/pillowmulti.py", line 146, in add_image
    self.opt_palette_size)
  File "/usr/local/lib/python2.7/site-packages/imageio/plugins/pillowmulti.py", line 348, in converToPIL
    raise ValueError('Invalid value for quantizer: %r' % quantizer)
ValueError: Invalid value for quantizer: 'wu'

=====================================
And my demo is:

#!/usr/bin/env python2

import moviepy.editor as mpy

clip = mpy.VideoFileClip("dog.mp4").subclip(2, 4)

clip.write_gif("dog.gif")

[ghost]

issue #368 talks about this..

one person suggests changing write_gif to write_videofile .

[Zulko]

It's just a compatibility bug linked to a new version of imageio, i'll send a pr fixing this, but as soon as imageio ships more recent ffmpeg versions (2.6+) there will be yet another way to produce gifs.

Changing write_gif to write_videofile is a bad idea: first it would be more confusing for people wanting to make gifs, second the way gifs are created can be different from videos, there would be little code factoring to be gained, and most importantly the parameters you need to write gifs are very different from the parameters you need for videos, so we would end up with 20 parameters for the same method, half of which have one use case only, and the other half another use case.

[linzhi]

Now the most appropriate solutions is to wait for fixing this problem...@Zulko

[linzhi]

use

clip.write_gif("dog.gif", program='ffmpeg')

solved this problem by this way, thanks @Zulko

[Zulko]

The thing is that if you just feed the gifs to ffmpeg like this, they will generally look less nice or be less optimized than with imagemagick. I'll try to push some improvements soon