Re: [AVTCORE] New Version Notification for draft-wu-avtcore-dynamic-pt-usage-00.txt
Colin Perkins <csp@csperkins.org> Thu, 05 September 2013 13:17 UTC
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From: Colin Perkins <csp@csperkins.org>
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Date: Thu, 05 Sep 2013 14:17:37 +0100
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To: Roni Even <ron.even.tlv@gmail.com>
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Subject: Re: [AVTCORE] New Version Notification for draft-wu-avtcore-dynamic-pt-usage-00.txt
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Why? You know whether RTP and RTCP are multiplexed or not. Colin On 5 Sep 2013, at 14:11, "Roni Even" <ron.even.tlv@gmail.com> wrote: > Colin, > One other reason and it would be added is to say that when selecting which pt numbers to use always assume that multiplexing of RTP/RTCP is used. > Roni > >> -----Original Message----- >> From: Colin Perkins [mailto:csp@csperkins.org] >> Sent: 05 September, 2013 3:28 PM >> To: Qin Wu >> Cc: Roni Even; avt@ietf.org >> Subject: Re: [AVTCORE] New Version Notification for draft-wu-avtcore- >> dynamic-pt-usage-00.txt >> >> Qin, >> >> On 5 Sep 2013, at 03:42, Qin Wu <bill.wu@huawei.com> wrote: >>> Hi,Colin: >>> For motivation, May I point you to look at the following discussion on >> MMUSIC mailing list: >>> http://www.ietf.org/mail-archive/web/payload/current/msg00542.html >>> http://www.ietf.org/mail-archive/web/mmusic/current/msg11062.html >>> http://www.ietf.org/mail-archive/web/mmusic/current/msg11107.html >>> >>> I don't know it is sufficient to just send some proposed IANA changes to >> IANA. >>> Usually based on my understanding, a document is needed to let IANA to >> take action. >> >> If your goal is simply to correct the registry to match RFC 5761, then I > don't >> believe you need a new document. Just email the IANA, and ask them to >> make the correction to match RFC 5761. >> >>> For your comments, I do think we give a new policy for new payload > format >> coming up, please see my reply below. >> ... >>> [Qin]: I disagree. just like two policies given in section 4 of RFC5761, > one >> new policy we want to give in this draft is since the registry for RTP > Payload >> types (PT) for standard audio and video >>> encodings is closed, new payload format *MUST* use dynamic payload >> type number assignment and Each new payload format is named by a >> registered media subtype. >>> >>> However RFC3551 section 3.1 only said,to register additional encoding, > you >> may either assign each encoding a short name, in some context, you refer > to >> these encodings in the form of a MIME content-type, or assigns static RTP >> payload type numbers, or assign with dynamic payload type number. >> >> I don't understand your message, but I do not believe there is a conflict >> between RFC 3551 and 5761. >> >>> [Qin]: I see. However one thing I don't understand, RFC5761only >>> proposes Multiplexing RTP Data and Control Packets on a Single Port, Why >> two policies defined in RFC5761 can affect RFC3551 and proposed payload >> type usage can be used to update RFC3551. >> >> Because the payload type in RTP and RTCP packet occupies the same byte, >> but is 7 bits in RTP and 8 bits in RTCP. When multiplexing RTP and RTCP >> packets on the same port it is necessary to specify how to distinguish. > That is >> the reason why RFC 5761 updates RFC 3551. >> >> >> -- >> Colin Perkins >> http://csperkins.org/ >> > > -- Colin Perkins http://csperkins.org/
- [AVTCORE] FW: New Version Notification for draft-… Roni Even
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Roni Even
- Re: [AVTCORE] New Version Notification for draft-… Magnus Westerlund
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Qin Wu
- Re: [AVTCORE] New Version Notification for draft-… Roni Even
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Qin Wu
- Re: [AVTCORE] New Version Notification for draft-… Qin Wu
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Roni Even
- Re: [AVTCORE] New Version Notification for draft-… Colin Perkins
- Re: [AVTCORE] New Version Notification for draft-… Adam Roach