matplotlib在gif错误中保存动画

概述我想以gif格式保存matplotlib动画. 我成功地使用代码将动画保存为mp4格式 import matplotlibmatplotlib.use("Agg")~some codes~ani = animation.FuncAnimation(fig, draw, update, interval=10, blit=False)mywriter = animation.FFMpeg 我想以gif格式保存matplotlib动画.

我成功地使用代码将动画保存为mp4格式

import matplotlibmatplotlib.use("Agg")~some codes~ani = animation.FuncAnimation(fig,draw,update,interval=10,blit=False)mywriter = animation.FFMpegWriter(fps=60)ani.save('myanimation.mp4',writer=mywriter)

但如果我将myanimation.mp4更改为gif格式,python会出错

Traceback (most recent call last):  file "C:\Users\administrator\Desktop\edison\Edison_v4_backup_1\ver5.py",line 164,in <module>    ani.save('demoanimation.gif',writer=mywriter);  file "C:\Python27\lib\site-packages\matplotlib\animation.py",line 718,in save    writer.grab_frame(**savefig_kwargs)  file "C:\Python27\lib\site-packages\matplotlib\animation.py",line 204,in grab_frame    dpi=self.dpi,**savefig_kwargs)  file "C:\Python27\lib\site-packages\matplotlib\figure.py",line 1421,in savefig    self.canvas.print_figure(*args,**kwargs)  file "C:\Python27\lib\site-packages\matplotlib\backend_bases.py",line 2220,in print_figure    **kwargs)  file "C:\Python27\lib\site-packages\matplotlib\backends\backend_agg.py",line 497,in print_raw    renderer._renderer.write_rgba(filename_or_obj)RuntimeError: Error writing to file

看到我成功保存为mp4格式,我不知道为什么它在保存gif格式时会出错.

解决方法 这是因为没有外部程序,matplotlib不支持GIF.如果您正确安装和配置了imagemagick,则应该可以：

import matplotlibmatplotlib.use('Agg')import matplotlib.pyplot as pltimport matplotlib.animationimport numpy as npdef init_animation():    global line    line,= ax.plot(x,np.zeros_like(x))    ax.set_xlim(0,2*np.pi)    ax.set_ylim(-1,1)def animate(i):    line.set_ydata(np.sin(2*np.pi*i / 50)*np.sin(x))    return line,fig = plt.figure()ax = fig.add_subplot(111)x = np.linspace(0,2*np.pi,200)ani = matplotlib.animation.FuncAnimation(fig,animate,init_func=init_animation,frames=50)ani.save('/tmp/animation.gif',writer='imagemagick',fps=30)

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