FFmpeg 和 Jupyter 笔记本

Question

尝试运行这个在Jupyter Notebook中创建和显示动画的简单示例时，出现错误RuntimeError: Requested MovieWriter (ffmpeg) not available 。

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-1-799d6a3690af> in <module>
      8 
      9 # Define the meta data for the movie
---> 10 FFMpegWriter = manimation.writers['ffmpeg']
     11 metadata = dict(title='Movie Test', artist='Matplotlib',
     12                 comment='a red circle following a blue sine wave')

/usr/local/lib/python3.8/dist-packages/matplotlib/animation.py in __getitem__(self, name)
    164         if self.is_available(name):
    165             return self._registered[name]
--> 166         raise RuntimeError(f"Requested MovieWriter ({name}) not available")
    167 
    168 

RuntimeError: Requested MovieWriter (ffmpeg) not available

运行!pip install ffmpeg没有帮助，因为ffmpeg已经安装，显然：

Requirement already satisfied: ffmpeg in /home/username/.local/lib/python3.8/site-packages

我怎样才能使这项工作？

Answer 1

我设法解决了这个问题，但是我花了很长时间才找到正确的解决方案，所以我会分享它以防它对某人有所帮助。 基本上，您需要下载最新的FFmpeg静态构建并将其添加到PATH ，以便它可以被python找到。 您可以通过运行以下脚本轻松完成此操作：

# Download a static FFmpeg build and add it to PATH.
exist = !which ffmpeg
if not exist:
  !curl https://johnvansickle.com/ffmpeg/releases/ffmpeg-release-amd64-static.tar.xz -o ffmpeg.tar.xz \
     && tar -xf ffmpeg.tar.xz && rm ffmpeg.tar.xz
  ffmdir = !find . -iname ffmpeg-*-static
  path = %env PATH
  path = path + ':' + ffmdir[0]
  %env PATH $path
print('')
!which ffmpeg
print('Done!')

希望能帮助到你！