active_pad = self.selector.get_property("active-pad")
if active_pad.get_name() == "sink_0":
new_pad = self.selector.get_static_pad("sink_1")
active_pad = self.selector.get_property("active-pad")
if active_pad.get_name() == "sink_0":
new_pad = self.selector.get_static_pad("sink_1")