The problem

Requested MovieWriter (ffmpeg) not available

Solution

Requirements

• conda env with ffmpeg and ipykernel

• conda env available in jupyter notebook (see Use your own kernel)

Optionally, PATH of ffmpeg software binaries on Levante.

What do you need to change/add

if you installed ffmpeg-python in your conda env:

conda install -c conda-forge ffmpeg

you only need to modify the kernel.json to add the PATH of the ffmpeg like this:

{
 "argv": [
  "/path/to/your/conda/env/bin/python",
  "-m",
  "ipykernel_launcher",
  "-f",
  "{connection_file}"
 ],
 "display_name": "my kernel",
 "language": "python",
 "env": {
    "PATH":
       "/path/to/your/conda_env/bin:$PATH"
       }
}

Note

This only concerns missing ffmpeg, some additional packages might be required depending on your code!

Example

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation


fig, ax = plt.subplots(1,1)
x=np.linspace(np.pi,4*np.pi,100)
N=len(x)
ax.set_xlim(len(x))
ax.set_ylim(-1.5,1.5)
line,  = ax.plot([],[],'o-')

def init():
    line.set_ydata(np.ma.array(x[:], mask=True))
   return line,

def animate(i, *args, **kwargs):
    y=np.sin(x*i)
    line.set_data(np.arange(N),y)            # update the data
    return line,

ani = animation.FuncAnimation(fig, animate, init_func=init,
     frames=100, interval=10, blit= False, repeat = False)

ani.save('test.mp4', writer="ffmpeg")
fig.show()

Troubleshootings

• libmkl_intel_thread.so.1: undefined symbol: omp_get_num_procs can be solved by:

  conda install –channel conda-forge llvm-openmp

• ImportError: failed to import graphviz; ... solved by:

  conda install –channel conda-forge python-graphviz

How to containerIze your jupyter kernel?   How to install jupyter kernel for Matlab