matplotlib.animation.FileMovieWriter#

classmatplotlib.animation.FileMovieWriter(*args,**kwargs)[source]#

MovieWriter for writing to individual files and stitching at the end.

This must be sub-classed to be useful.

Parameters:

fpsint, default: 5

Movie frame rate (per second).

codecstr or None, default:rcParams["animation.codec"] (default:'h264')

The codec to use.

bitrateint, default:rcParams["animation.bitrate"] (default:-1)

The bitrate of the movie, in kilobits per second. Higher valuesmeans higher quality movies, but increase the file size. A valueof -1 lets the underlying movie encoder select the bitrate.

extra_argslist of str or None, optional

Extra command-line arguments passed to the underlying movie encoder. Thesearguments are passed last to the encoder, just before the filename. Thedefault, None, means to usercParams["animation.[name-of-encoder]_args"] for thebuiltin writers.

metadatadict[str, str], default: {}

A dictionary of keys and values for metadata to include in theoutput file. Some keys that may be of use include:title, artist, genre, subject, copyright, srcform, comment.

__init__(*args,**kwargs)[source]#

Parameters:

fpsint, default: 5

Movie frame rate (per second).

codecstr or None, default:rcParams["animation.codec"] (default:'h264')

The codec to use.

bitrateint, default:rcParams["animation.bitrate"] (default:-1)

The bitrate of the movie, in kilobits per second. Higher valuesmeans higher quality movies, but increase the file size. A valueof -1 lets the underlying movie encoder select the bitrate.

extra_argslist of str or None, optional

Extra command-line arguments passed to the underlying movie encoder. Thesearguments are passed last to the encoder, just before the filename. Thedefault, None, means to usercParams["animation.[name-of-encoder]_args"] for thebuiltin writers.

metadatadict[str, str], default: {}

A dictionary of keys and values for metadata to include in theoutput file. Some keys that may be of use include:title, artist, genre, subject, copyright, srcform, comment.

Methods

__init__(*args, **kwargs)
bin_path()	Return the binary path to the commandline tool used by a specific subclass.
finish()	Finish any processing for writing the movie.
grab_frame(**savefig_kwargs)	Grab the image information from the figure and save as a movie frame.
isAvailable()	Return whether a MovieWriter subclass is actually available.
saving(fig, outfile, dpi, *args, **kwargs)	Context manager to facilitate writing the movie file.
setup(fig, outfile[, dpi, frame_prefix])	Setup for writing the movie file.

Attributes

frame_format	Format (png, jpeg, etc.) to use for saving the frames, which can be decided by the individual subclasses.
frame_size	A tuple(width,height) in pixels of a movie frame.
supported_formats

finish()[source]#

Finish any processing for writing the movie.

propertyframe_format#

Format (png, jpeg, etc.) to use for saving the frames, which can bedecided by the individual subclasses.

grab_frame(**savefig_kwargs)[source]#

Grab the image information from the figure and save as a movie frame.

All keyword arguments insavefig_kwargs are passed on to thesavefig call that saves the figure. However, severalkeyword arguments that are supported bysavefig may not bepassed as they are controlled by the MovieWriter:

• dpi,bbox_inches: These may not be passed because each frame of the

  animation much be exactly the same size in pixels.

• format: This is controlled by the MovieWriter.

setup(fig,outfile,dpi=None,frame_prefix=None)[source]#

Setup for writing the movie file.

Parameters:

figFigure

The figure to grab the rendered frames from.

outfilestr

The filename of the resulting movie file.

dpifloat, default:fig.dpi

The dpi of the output file. This, with the figure size,controls the size in pixels of the resulting movie file.

frame_prefixstr, optional

The filename prefix to use for temporary files. IfNone (thedefault), files are written to a temporary directory which isdeleted byfinish; if notNone, no temporary files aredeleted.