Re: [rtcweb] [MMUSIC] FW: New Version Notification for draft-holmberg-mmusic-sdp-multiplex-negotiation-00.txt

Hi,
I think that you MUST have unique payload type numbers in all m-lines.
As for parameters I am not sure what will be the outcome of the bandwidth if
they appear in both m-lines. Or for encryption parameters if you offer
SAVP/SAVPF.

BTW: This solution is not limited to RTCWEB, at least it does not say it is.

Regards
Roni Even 

> -----Original Message-----
> From: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] On
> Behalf Of Christer Holmberg
> Sent: Friday, September 16, 2011 2:36 PM
> To: Muthu Arul Mozhi Perumal (mperumal); rtcweb@ietf.org; IETF - MMUSIC
> Subject: Re: [MMUSIC] [rtcweb] FW: New Version Notification for draft-
> holmberg-mmusic-sdp-multiplex-negotiation-00.txt
> 
> 
> Hi Muthu,
> 
> You suggestion looks good, and I'll implement it in the next version of
> the draft.
> 
> Thanks!
> 
> Regards,
> 
> Christer
> 
> 
> > -----Original Message-----
> > From: Muthu Arul Mozhi Perumal (mperumal) [mailto:mperumal@cisco.com]
> > Sent: 16. syyskuuta 2011 14:26
> > To: Christer Holmberg; rtcweb@ietf.org; IETF - MMUSIC
> > Subject: RE: [rtcweb] FW: New Version Notification for
> > draft-holmberg-mmusic-sdp-multiplex-negotiation-00.txt
> >
> > The approach looks good overall. A quick comment on section
> > 5. SDP Offer/Answer Procedures:
> >
> > |When an SDP offerer wants to offer multiplexed media, it inserts the
> > |same port number value for each "m=" line that is part of
> > the offered
> > |multiplex.  In addition, the SDP offerer inserts an SDP
> > session-level
> > |"a=group" attribute, with a "MULTIPLEX" value, and assigns an SDP
> > |media-level "a=mid" attribute value for each "m=" line that
> > is part of
> > |the offered multiplex.
> >
> > Suggestion:
> >
> > An entity generating an SDP offer or answer describing
> > multiplexed media does the following:
> > 1. Inserts the same port number for each "m=" line that is part of
> >    the multiplex.
> > 2. Uses the same connection data ("c=" line) values for each media
> >    stream that is part of the multiplex.
> > 3. Inserts the same RTCP port number in the "a=rtcp" attribute for
> >    each media stream that is part of the multiplex, when the RTCP
> >    port is not the next higher (odd) port number following the RTP
> >    port described in the "m=" line.
> > 4. Inserts an "a=rtcp-mux" attribute for each media stream that is
> >    part of the multiplex, when RTCP is multiplexed with RTP on the
> >    same port.
> > 5. Inserts an SDP session-level "a=group" attribute, with a
> > "MULTIPLEX"
> >    value, and assigns an SDP media-level "a=mid" attribute value for
> >    each "m=" line that is part of the multiplex.
> >
> > Muthu
> >
> > |-----Original Message-----
> > |From: rtcweb-bounces@ietf.org [mailto:rtcweb-bounces@ietf.org] On
> > Behalf Of Christer Holmberg
> > |Sent: Wednesday, September 14, 2011 4:17 PM
> > |To: rtcweb@ietf.org
> > |Subject: [rtcweb] FW: New Version Notification for
> > draft-holmberg-mmusic-sdp-multiplex-negotiation-
> > |00.txt
> > |
> > |
> > |
> > |Hi,
> > |
> > |I've submitted a draft in MMUSIC, which defines a mechanism and
> > grouping framework extension in order
> > |to negotiate multiplexing of media associated with multiple m=
> lines.
> > |
> > |The main difference from Harald's previous proposal is that
> > it defines
> > the usage of the same port
> > |number value for multiple m= lines, and every m= line is used to
> > describe media even in the case of
> > |multiplex.
> > |
> > |Comments are welcome :)
> > |
> > |Regards,
> > |
> > |Christer
> > |
> > |
> > |
> > |
> > |> -----Original Message-----
> > |> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> > |> Sent: 14. syyskuuta 2011 13:32
> > |> To: Christer Holmberg
> > |> Cc: Christer Holmberg
> > |> Subject: New Version Notification for
> > |> draft-holmberg-mmusic-sdp-multiplex-negotiation-00.txt
> > |>
> > |> A new version of I-D,
> > |> draft-holmberg-mmusic-sdp-multiplex-negotiation-00.txt has been
> > |> successfully submitted by Christer Holmberg and posted to the IETF
> > |> repository.
> > |>
> > |> Filename:	 draft-holmberg-mmusic-sdp-multiplex-negotiation
> > |> Revision:	 00
> > |> Title:		 Multiplexing Negotiation Using Session
> > |> Description Protocol (SDP) Port Numbers
> > |> Creation date:	 2011-09-14
> > |> WG ID:		 Individual Submission
> > |> Number of pages: 9
> > |>
> > |> Abstract:
> > |>    This document defines how to use the Session
> > Description Protocol
> > |>    (SDP) in order to negotiate the usage of multiplexed media.
> > |>
> > |>
> > |>
> > |>
> > |>
> > |> The IETF Secretariat
> > |>
> > |_______________________________________________
> > |rtcweb mailing list
> > |rtcweb@ietf.org
> > |https://www.ietf.org/mailman/listinfo/rtcweb
> >
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