Creates a new animation by asynchronously loading an image from an input stream.
For more details see gdk_pixbuf_new_from_stream(), which is the synchronous
version of this function.
When the operation is finished, callback will be called in the main thread.
You can then call gdk_pixbuf_animation_new_from_stream_finish() to get the
result of the operation.
Since 2.28
Creates a new animation by asynchronously loading an image from an input stream. For more details see gdk_pixbuf_new_from_stream(), which is the synchronous version of this function. When the operation is finished, callback will be called in the main thread. You can then call gdk_pixbuf_animation_new_from_stream_finish() to get the result of the operation. Since 2.28