directory-of-files MovieWriter subclass #7679
Description
Derived from https://stackoverflow.com/questions/41230286/matplotlib-animation-write-to-png-files-without-third-party-module
Some version of my answer http://stackoverflow.com/a/41273312/380231
import matplotlib.animation as ma
class BunchOFiles(ma.FileMovieWriter):
def setup(self, fig, dpi, frame_prefix):
super().setup(fig, dpi, frame_prefix, clear_temp=False)
def _run(self):
# Uses subprocess to call the program for assembling frames into a
# movie file. *args* returns the sequence of command line arguments
# from a few configuration options.
pass
def grab_frame(self, **savefig_kwargs):
'''
Grab the image information from the figure and save as a movie frame.
All keyword arguments in savefig_kwargs are passed on to the 'savefig'
command that saves the figure.
'''
# Tell the figure to save its data to the sink, using the
# frame format and dpi.
with self._frame_sink() as myframesink:
self.fig.savefig(myframesink, format=self.frame_format,
dpi=self.dpi, **savefig_kwargs)
def cleanup(self):
# explictily skip a step in the mro
ma.MovieWriter.cleanup(self)should end up in the animation module in the case where people just want a folder of png and don't have any of the other external tools installed.