Get an iterator for displaying an animation. The iterator provides the
frames that should be displayed at a given time.
Returns the beginning of the animation. Afterwards you should probably
immediately display the pixbuf return by
GDK2.PixbufAnimationIter->get_pixbuf(). Then, you should install a timeout
or by some other mechanism ensure that you'll update the image after
GDK2.PixbufAnimationIter->get_delay_time() milliseconds. Each time the
image is updated, you should reinstall the timeout with the new, possibly
changed delay time.
To update the image, call GDK2.PixbufAnimationIter->advance().
GTK2.GdkPixbufAnimation()->get_height()