Re: [AVTCORE] IANAs payload type number registry and RFC 5761

Magnus Westerlund <magnus.westerlund@ericsson.com> Wed, 05 March 2014 18:35 UTC

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Date: Wed, 05 Mar 2014 18:35:43 +0000
From: Magnus Westerlund <magnus.westerlund@ericsson.com>
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Subject: Re: [AVTCORE] IANAs payload type number registry and RFC 5761
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WG,

Got word smithed text from Stephen Casner:

    The RFC "RTP Profile for Audio and Video Conferences with Minimal
    Control" [RFC3551] specified an initial set "payload types".  This
    registry maintained that list. The registry is now closed, see RFC
    3551. No additional registrations will be done.  The payload types
    that have a static mapping are the ones listed below (0-34).

    The set of types marked "Reserved for RTCP conflict avoidance" in
    this table may not be kept current.  [RTCP Control Packet types
    (PT)] below lists the RTCP types that have actually been
    registered.  Subtract 128 from the RTCP Packet Type value to find
    the corresponding PT value with collision risk.  For further
    information see RFC 5761.

    If you seek guidance on which PT values to use for assigning
    dynamic payload types, see RFC 3551 (Section 3) and RFC 5761
    (Section 4).

Thanks,

Magnus


On 2014-03-05 17:09, Magnus Westerlund wrote:
> WG,
> 
> I received some feedback on this from Stephen Casner, so I have proposed
> some changes. This merges the first and second paragraph and addresses
> the tenses.
> 
> AVTCORE WG requests that IANA adds the below note to the registry:
> 
> RTP Payload types (PT) for standard audio and video encodings
> http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xhtml#rtp-parameters-1
> 
> The current note reads:
> 
> Note
> 
>     The RFC "RTP Profile for Audio and Video Conferences with Minimal
>     Control" [RFC3551] specifies an initial set "payload types".  This
>     list maintains and extends that list.
> 
> The WG requests that this is change to:
> 
> Note
> 
>     The RFC "RTP Profile for Audio and Video Conferences with Minimal
>     Control" [RFC3551] specified an initial set "payload types".  This
>     registry maintained that list. The registry is now closed, see
>     RFC 3551. No additional registrations will be done. The payload
>     types that have a static mapping are the below ones (0-34).
> 
>     The "Reserved for RTCP conflict avoidance" in this table is not up
>     to date. [RTCP Control Packet types (PT)] below lists the RTCP
>     types that has actually been registered. Subtract 128 from the
>     RTCP Packet Type value to find the corresponding PT value with
>     collision risk. For further information see RFC 5761.
> 
>     If you seek guidance on which PT values to use for assigning
>     dynamic payload types, then that is present in RFC 3551 (Section 3)
>     and RFC 5761 (Section 4).
> 
> 
> Note, if possible I would request that "[RTCP Control Packet types
> (PT)]" is made into ling with the following URL:
> 
> http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xhtml#rtp-parameters-4
> 
> 


-- 

Magnus Westerlund

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