%% You should probably cite rfc3388 instead of this I-D. @techreport{ietf-mmusic-fid-06, number = {draft-ietf-mmusic-fid-06}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-mmusic-fid/06/}, author = {Henning Schulzrinne and Gonzalo Camarillo and Goran AP Eriksson and Jan Holler}, title = {{Grouping of Media Lines in the Session Description Protocol (SDP)}}, pagetotal = 11, year = 2002, month = feb, day = 28, abstract = {This document defines two SDP attributes: 'groupe' and 'mid'. They allow to group together several 'm' lines for two different purposes: for lip synchronization and for receiving media from a single flow (several media streams), encoded in different formats during a particular session, in different ports and host interfaces.}, }