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Re: [MMUSIC] Draft-ietf-mmusic-rfc4566bis-05: session-level attributes

Paul Kyzivat <pkyzivat@alum.mit.edu> Mon, 11 March 2013 11:26 UTC

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Date: Mon, 11 Mar 2013 19:26:06 +0800
From: Paul Kyzivat <pkyzivat@alum.mit.edu>
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To: "Ali C. Begen (abegen)" <abegen@cisco.com>
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Brett Tate <brett@broadsoft.com>
Subject: Re: [MMUSIC] Draft-ietf-mmusic-rfc4566bis-05: session-level attributes
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On 3/11/13 11:32 AM, Ali C. Begen (abegen) wrote:
> Hi Brett,
>
> On Mar 10, 2013, at 10:27 AM, Brett Tate <brett@broadsoft.com> wrote:
>
>>>>      An example SDP description is:
>>>>
>>>>         v=0
>>>>         o=jdoe 2890844526 2890842807 IN IP4 198.51.100.1
>>>>         s=SDP Seminar
>>>>         i=A Seminar on the session description protocol
>>>>         u=http://www.example.com/seminars/sdp.pdf
>>>>         e=j.doe@example.com (Jane Doe)
>>>>         c=IN IP4 233.252.0.1/127
>>>>         t=2873397496 2873404696
>>>>         a=recvonly
>>>>         m=audio 49170 RTP/AVP 0
>>>>         m=video 51372 RTP/AVP 99
>>>>         a=rtpmap:99 h263-1998/90000
>>>>         a=recvonly
>>>>
>>>
>>> Is not the last/second "recvonly" redundant?
>>
>>
>> Yes; although is simplifies the example.  The following example/description adjustment reflects a potential change to the session level attribute.
>>
>> Within the following SDP example, the "inactive" attribute applies to audio media and the "recvonly" attribute applies to video media.
>>
>>        v=0
>>        o=jdoe 2890844526 2890842807 IN IP4 198.51.100.1
>>        s=SDP Seminar
>>        i=A Seminar on the session description protocol
>>        u=http://www.example.com/seminars/sdp.pdf
>>        e=j.doe@example.com (Jane Doe)
>>        c=IN IP4 233.252.0.1/127
>>        t=2873397496 2873404696
>>        a=inactive
>>        m=audio 49170 RTP/AVP 0
>>        m=video 51372 RTP/AVP 99
>>        a=rtpmap:99 h263-1998/90000
>>        a=recvonly
>
> Yes, I like this example better. I will put this instead.
>
> Paul, I think this also satisfies the "more complex" example you considered.

Yes it does.

	Thanks,
	Paul

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