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

"Ali C. Begen (abegen)" <abegen@cisco.com> Mon, 11 March 2013 03:32 UTC

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From: "Ali C. Begen (abegen)" <abegen@cisco.com>
To: Brett Tate <brett@broadsoft.com>
Thread-Topic: [MMUSIC] Draft-ietf-mmusic-rfc4566bis-05: session-level attributes
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Date: Mon, 11 Mar 2013 03:32:30 +0000
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Cc: "mmusic@ietf.org" <mmusic@ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>
Subject: Re: [MMUSIC] Draft-ietf-mmusic-rfc4566bis-05: session-level attributes
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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.

-acbegen

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