Re: [MMUSIC] RID update (draft-pthatcher-mmusic-rid-01,> )
Adam Roach <adam@nostrum.com> Fri, 16 October 2015 16:42 UTC
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To: Paul Kyzivat <pkyzivat@alum.mit.edu>, mmusic@ietf.org
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From: Adam Roach <adam@nostrum.com>
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Date: Fri, 16 Oct 2015 11:41:57 -0500
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Subject: Re: [MMUSIC] RID update (draft-pthatcher-mmusic-rid-01,> )
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On 10/15/15 22:04, Paul Kyzivat wrote: > * Section 7.1: > > In: > > 1. It MUST generate a 'rid-identifier' that is unique within a media > description > > IIUC, the rid-identifier must be unique within an RTP session, > including all the media descriptions pertaining to that RTP session. Added: Note that 'rid's are only required to be unique within a media section ("m-line"); they do not necessarily need to be unique within an entire RTP session. In traditional usage, each media section is sent on its own unique 5-tuple, which provides an unambiguous scope. Similarly, when using BUNDLE [I-D.ietf-mmusic-sdp-bundle-negotiation], MID values associate RTP streams uniquely to a single media description. > > * Section 7.2.2, item 2: > > Restating my earlier comment, why not simply check the PT against > those listed in the m-line? There could be default PTs in use that > have no rtpmap or fmtp. Those are only defined for audio, but there > *could* be rid constraints applied to audio. (I think max-br would > potentially be applicable. Or new ones might be defined that apply.) > At least it seems harmless to define it this way. Updated to: ...payload types is verified against the list of valid payload types for the media section (that is, those listed on the "m=" line). If there is no match for the Payload Type listed in the "a=rid" line, then remove the "a=rid" line. > > > * Section 7.4, item 4: > > I think there should be a check that the PTs in the answer are a > subset of those in the offer. Added: 4. If the "a=rid" line contains a "pt=" parameter, the offerer verifies that the list of payload types is a subset of those sent in the corresponding "a=rid" line in the offer. > (And, while it can be inferred, it might be good to state somewhere > that in cases where the answerer m-line PT values differ from those in > the offer, the PTs in the answer rid use the offerer's PT values.) Added: Note: in the case that the answerer uses different PT values to represent a codec than the offerer did, the "a=rid" values in the answer use the PT values that were sent in the offer. /a
- [MMUSIC] RID update Adam Roach
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Mo Zanaty (mzanaty)
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Adam Roach
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Mo Zanaty (mzanaty)
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Paul Kyzivat
- Re: [MMUSIC] RID update Cullen Jennings
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Adam Roach
- Re: [MMUSIC] RID update (draft-pthatcher-mmusic-r… Paul Kyzivat
- [MMUSIC] draft-pthatcher-mmusic-rid-02 Adam Roach
- Re: [MMUSIC] draft-pthatcher-mmusic-rid-02 Paul Kyzivat
- Re: [MMUSIC] RID update Christian Groves