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I got a revelation - as colorbar wasn't changing with animation iteration I put it in init() function and draw the first frame there.
Voila :) 

Hi, I'm stacked again, sorry, but I couldn't find any pointers with my google.
In my filled contour animation I thought to use colorbar instead complicating with contour labeling, which just makes animation too full. So after reading the docs, I used something like this simplified code:
==================================================
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import animation
def init():
 return ax.cla(),
def animate(i):
 global t
 r = np.random.random(10)
 c = np.sin(2 * np.pi * r) * np.vstack(np.cos(2 * np.pi * r))
 ax.cla()
 cax = ax.contourf(c)
 cbar = fig.colorbar(cax, ticks=[0, .3, .6, 1])
 cbar.ax.set_yticklabels(['a', 'b', 'c', 'd'])
 return ax,
if __name__ == '__main__':
 fig = plt.figure()
 ax = fig.add_subplot(111)
 anim = animation.FuncAnimation(fig, animate, init_func=init,
 frames=100,
 interval=15,
 blit=True)
 anim.save('test.mp4', fps=15, extra_args=['-vcodec', 'libx264'])
==================================================
and noticed that colorbar object is not cleared from the scene, but it repeatedly fills the plot until there are only colorbars on it. Here is sample frame:
http://i.imgur.com/ydoUFrO.png
And I have no idea how to clean it. Can anyone tell me how to clean this colorbar while iterating animation?
Thanks