Only includes an rtcp-mux element inside 'transport'.

libs/colibri/colibri.focus.js

 
             elem.c(elemName, elemAttrs);
             elem.attrs({ endpoint: peer.substr(1 + peer.lastIndexOf('/')) });
-            if ('channel' === elemName && config.useRtcpMux) {
-                elem.c('rtcp-mux').up();
-            }
             elem.up(); // end of channel/sctpconnection
         }
         elem.up(); // end of content
 
         elem.c('content', { name: name });
         elem.c(elemName, elemAttrs);
-        if ('channel' === elemName && config.useRtcpMux) {
-            elem.c('rtcp-mux').up();
-        }
         elem.up(); // end of channel/sctpconnection
         elem.up(); // end of content
     });
                 endpoint: $(this.channels[participant][channel]).attr('endpoint'),
                 expire: self.channelExpire
             });
-            if (config.useRtcpMux) {
-                change.c('rtcp-mux').up();
-            }
 
             var rtpmap = SDPUtil.find_lines(remoteSDP.media[channel], 'a=rtpmap:');
             rtpmap.forEach(function (val) {
                 endpoint: $(self.channels[participant][channel]).attr('endpoint'),
                 expire: self.channelExpire
             });
-
-            if (config.useRtcpMux) {
-                change.c('rtcp-mux').up();
-            }
         }
         else
         {
                 pwd: $(this).attr('pwd'),
                 xmlns: $(this).attr('xmlns')
             });
+            if (config.useRtcpMux
+                  && 'channel' === change.node.parentNode.nodeName) {
+                change.c('rtcp-mux').up();
+            }
 
             $(this).find('>candidate').each(function () {
                 /* not yet
                     endpoint: $(this.mychannel[cands[0].sdpMLineIndex]).attr('endpoint'),
                     expire: self.channelExpire
                 });
-                if (config.useRtcpMux) {
-                    mycands.c('rtcp-mux').up();
-                }
-
             }
             else
             {
                 });
             }
             mycands.c('transport', {xmlns: 'urn:xmpp:jingle:transports:ice-udp:1'});
+            if (config.useRtcpMux && name !== 'data') {
+                mycands.c('rtcp-mux').up();
+            }
             for (var i = 0; i < cands.length; i++) {
                 mycands.c('candidate', SDPUtil.candidateToJingle(cands[i].candidate)).up();
             }