chainging udpsink host property in RTP server

[Lucifer]

Hello,
I have a pipeline like this one http://cgit.freedesktop.org/gstreamer/gst-plugins-good/tree/tests/examples/rtp/server-v4l2-H264-alsasrc-PCMA.sh in my C application.

Now I'd like to change the udpsink "host" property of all the 4 flows (audio rtp, audio rtcp, video rtp and video rtcp).

What is the better way to proceed? is it possible to do it without stopping the pipeline?

using g_object_set in playing state doesn't work.
Thanks!!
Lucy