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Description [extrait de AbstractMovieWriter.__doc__]
Abstract base class for writing movies. Fundamentally, what a MovieWriter
does is provide is a way to grab frames by calling grab_frame().
setup() is called to start the process and finish() is called afterwards.
This class is set up to provide for writing movie frame data to a pipe.
saving() is provided as a context manager to facilitate this process as::
with moviewriter.saving(fig, outfile='myfile.mp4', dpi=100):
# Iterate over frames
moviewriter.grab_frame(**savefig_kwargs)
The use of the context manager ensures that setup() and finish() are
performed as necessary.
An instance of a concrete subclass of this class can be given as the
``writer`` argument of `Animation.save()`.
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