At the Taipei IETF I presented the BUNDLE draft, written by myself and Harald, which extends the SDP grouping framework in order to allow the usage of identical port values in multiple m- lines in an SDP offer/answer.
It can be used when negotiating the usage of multiplexing of multiple media streams. Such mechanism is very likely going to be needed e.g. in the work being done in RTCWEB.
When presented, some people indicated that they may want to look at other alternatives.
However, as no alternative solutions have been brought forward since then, my question is whether people now would be interested in moving ahead with the BUNDLE mechanism, and adopt the above draft as a starting point?