add pad-removed handler

which does not get called :(

combined.c

@@ -43,7 +43,7 @@ pad_added_cb (GstElement *rtpbin, GstPad *srcpad, GstElement *depayloader)
 {
   GstPad *sinkpad;
 
-  g_debug ("%s", GST_PAD_NAME (srcpad));
+  g_debug ("pad added: %s", GST_PAD_NAME (srcpad));
 
   sinkpad = gst_element_get_static_pad (depayloader, "sink");
   if (gst_pad_link (srcpad, sinkpad) != GST_PAD_LINK_OK)
@@ -52,6 +52,21 @@ pad_added_cb (GstElement *rtpbin, GstPad *srcpad, GstElement *depayloader)
   gst_object_unref (sinkpad);
 }
 
+static void
+pad_removed_cb (GstElement *rtpbin, GstPad *srcpad, GstElement *depayloader)
+{
+  GstPad *sinkpad;
+
+  g_debug ("pad removed: %s", GST_PAD_NAME (srcpad));
+
+  sinkpad = gst_element_get_static_pad (depayloader, "sink");
+  if (!gst_pad_unlink (srcpad, sinkpad))
+    g_warning ("Failed to unlink from %s (probably never linked)",
+               GST_PAD_NAME (sinkpad));
+
+  gst_object_unref (sinkpad);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -184,6 +199,7 @@ main (int argc, char **argv)
 
   /* need to link RTP pad to the depayloader */
   g_signal_connect (data.recv_rtpbin, "pad-added", G_CALLBACK (pad_added_cb), data.depayloader);
+  g_signal_connect (data.recv_rtpbin, "pad-removed", G_CALLBACK (pad_removed_cb), data.depayloader);
 
 
   /* out/send direction */