Closed as not planned
Description
Matplotliv 1.5.1 on Linux (Debian) animation's method to_html5_video() seems not to support AVconv:
Example:
%matplotlib inline
from pylab import *
import matplotlib.animation
import matplotlib.patches
fig, ax = plt.subplots(figsize=(13, 8))
def update(frame):
ax.add_patch(matplotlib.patches.Rectangle(numpy.array([0, 0]), 1, 1))
anim = matplotlib.animation.FuncAnimation(fig, update, frames=10)
anim.save('anim.mp4', fps=20, writer='avconv', codec='libx264')
Gives exception:
/opt/conda/lib/python3.5/site-packages/matplotlib/animation.py in to_html5_video(self)
949 # We create a writer manually so that we can get the
950 # appropriate size for the tag
--> 951 Writer = writers[rcParams['animation.writer']]
952 writer = Writer(codec='h264',
953
/opt/conda/lib/python3.5/site-packages/matplotlib/animation.py in __getitem__(self, name)
87 if not self.avail:
88 raise RuntimeError("No MovieWriters available!")
---> 89 return self.avail[name]
90
91 writers = MovieWriterRegistry()
KeyError: 'ffmpeg'
I'm not sure what it does, but just having the video displayed in Jupyter is pretty simple:
from IPython.display import HTML
import base64
anim.save('temp.mp4', fps=20, writer='avconv', codec='libx264')
with open('temp.mp4', 'rb') as f:
video_tag = '<video controls alt="test" src="data:video/x-m4v;base64,{0}">'.format(base64.b64encode(f.read()).decode('utf-8'))
HTML(video_tag)
I didn't find a simple way to ask to_html5_video() to use AVconv or set the writer, and FFmpeg is kind of deprecated on Debian (see package info stating "Be careful, FFmpeg is not available on Debian 8 Jessie"). Simplest seems to support AVconv by default or as fallback.