def easyway(self, frames):
    for i in range(0, frames):
        fileName = 'videoName' + '%04d.png' % i
matplotlib.pyplot.scatter(xdata, ydata, c=coldata, marker='*', s=15.0,
    edgecolor='none')
matplotlib.pyplot.savefig(self.workingDirectory + 'temp/' + fileName, dpi=dpi)
matplotlib.pyplot.close()
self.createVideoFile(fps)
if cleanUp:
    print('temporary picture files being removed...')
self.clearDirectory()
print('FINISHED')

def clearDirectory(self, directoryName='temp'):
    files = glob.glob(self.workingDirectory + directoryName + '/*')
for f in files:
    os.remove(f)

def createVideoFile(self, fps=3):
    command = 'ffmpeg -f image2 -r %s -i %s%s' % (str(fps), self.
        workingDirectory + 'temp/', self.universe.description)
command += '%04d.png'
command += ' -c:v libx264 -r 30 %s.mp4' % (self.workingDirectory +
    'videos/' + self.universe.description)
print('Running command:')
print(command)
p = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=
    subprocess.STDOUT)
output = p.communicate()[0]
print('output\n' + '*' * 10 + '\n')
print(output)
print('*' * 10)
print('Video file has been written')
Saving scatterplot animations with matplotlib produces blank video file