I have a jupyter notebook that produces an animation. It was working on my old laptop (xubuntu gnu/linux). Now on my new laptop (trisquel gnu/linux) it's not working. This makes me think I have a missing library or something like that but I can't work it out.
As a test, I went back to the tutorial where I learned how to do jupyter notebook animations in the first place (http://louistiao.me/posts/notebooks/embedding-matplotlib-animations-in-jupyter-notebooks/). I get the same problem when I run code cell [7].
The error is shown below.
Any help in solving this problem would be greatly appreciated.
Many thanks :)
[edit 1] If I try anim.save(...) instead of HTML(anim.to_html5_video()), I get the same problem.
[edit 2] If I download the notebook as a *.py file and run it using regular python (rather than ipython), then I get the same problem.
[edit 3] My ffmpeg installation appears to be working as I am able to manually create an animation from a series of images. I can use this as a work-around for now but it's very clunky and the HTML(anim.to_html5_video()) solution should work so still needs to be sorted.
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-7-5114ccf53b4c> in <module>()
----> 1 HTML(anim.to_html5_video())
/usr/local/lib/python2.7/site-packages/matplotlib/animation.pyc in to_html5_video(self)
1157 bitrate=rcParams['animation.bitrate'],
1158 fps=1000. / self._interval)
-> 1159 self.save(f.name, writer=writer)
1160
1161 # Now open and base64 encode
/usr/local/lib/python2.7/site-packages/matplotlib/animation.pyc in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs)
1011 # TODO: See if turning off blit is really necessary
1012 anim._draw_next_frame(d, blit=False)
-> 1013 writer.grab_frame(**savefig_kwargs)
1014
1015 # Reconnect signal for first draw if necessary
/usr/local/lib/python2.7/contextlib.pyc in __exit__(self, type, value, traceback)
33 value = type()
34 try:
---> 35 self.gen.throw(type, value, traceback)
36 raise RuntimeError("generator didn't stop after throw()")
37 except StopIteration, exc:
/usr/local/lib/python2.7/site-packages/matplotlib/animation.pyc in saving(self, *args, **kw)
254 yield self
255 finally:
--> 256 self.finish()
257
258 def _run(self):
/usr/local/lib/python2.7/site-packages/matplotlib/animation.pyc in finish(self)
274 def finish(self):
275 'Finish any processing for writing the movie.'
--> 276 self.cleanup()
277
278 def grab_frame(self, **savefig_kwargs):
/usr/local/lib/python2.7/site-packages/matplotlib/animation.pyc in cleanup(self)
309 def cleanup(self):
310 'Clean-up and collect the process used to write the movie file.'
--> 311 out, err = self._proc.communicate()
312 self._frame_sink().close()
313 verbose.report('MovieWriter -- '
/usr/local/lib/python2.7/site-packages/subprocess32.pyc in communicate(self, input, timeout)
925
926 try:
--> 927 stdout, stderr = self._communicate(input, endtime, timeout)
928 finally:
929 self._communication_started = True
/usr/local/lib/python2.7/site-packages/subprocess32.pyc in _communicate(self, input, endtime, orig_timeout)
1711 if _has_poll:
1712 stdout, stderr = self._communicate_with_poll(input, endtime,
-> 1713 orig_timeout)
1714 else:
1715 stdout, stderr = self._communicate_with_select(input, endtime,
/usr/local/lib/python2.7/site-packages/subprocess32.pyc in _communicate_with_poll(self, input, endtime, orig_timeout)
1767 select_POLLIN_POLLPRI = select.POLLIN | select.POLLPRI
1768 if self.stdout:
-> 1769 register_and_append(self.stdout, select_POLLIN_POLLPRI)
1770 stdout = self._fd2output[self.stdout.fileno()]
1771 if self.stderr:
/usr/local/lib/python2.7/site-packages/subprocess32.pyc in register_and_append(file_obj, eventmask)
1746 poller = select.poll()
1747 def register_and_append(file_obj, eventmask):
-> 1748 poller.register(file_obj.fileno(), eventmask)
1749 self._fd2file[file_obj.fileno()] = file_obj
1750
ValueError: I/O operation on closed file
