Framesteping in audio/video pipeline in PAUSED. How to skip buffers?

[wl2776]

http://cgit.freedesktop.org/gstreamer/gstreamer/tree/docs/design/part-framestep.txt#n71 says that on reception of the step-done message the application must skip the same amount of buffers in the audio-sink.

I use playbin2 and can obtain audiosink though its property.

Which function should I call to make it skip that buffers?

[wl2776]

I've noticed that I always receive two step-done messages, one from video sink and another from audio sink.
But the queried position anyway doesn't change without flushing seek if stepping backwards.