[media-types] Conclusion of indication of RTP Payload formats in Media Types registry

AVTCORE and Mediaman

In today’s Mediaman WG meeting the question of indication of RTP payload format in the IANA Media Type registry was discussed. The github issue for this issue: https://github.com/ietf-wg-mediaman/6838bis/issues/18

The problem with adding an indication in the IANA table is that it creates a precedence of having information in the table that is only useful for a particular user set of the media types, and not everyone. I see the issues with this. The conclusion of the issue was to close it without any further changes to media types registration rule or the registry.

It is important to note that RTP payload formats are still detectable if one look at their Media Types registration as they use both Encoding: framed, as well as Restriction and usages. However, for older RTP payload types this has not be consistently applied.

Mark Nottingham also asked if AVTCORE could not create a new registry for RTP Payload types to correctly include all that are RTP payload types?

>From my perspective this is possible. There is a construction that could ensure that in the future one do not miss to registration in both registries. If the RTP Payload format only register in the new registry and that registry has a rule that any registration in this table MUST be first added to the Media Types registry one can avoid mistakes as IANA will follow the rules for the new registry and ensure consistency.

So the above would be if there are significant value to have a single table that contains all RTP payload formats. If that is desirable the actions for someone in AVTCORE would be the following:

Write new registration rules for RTP payload format that defines a new registry, the registry rules for this registry are:

  *   Request registration in the new registry that list media type and reference
  *   Registratnts must create a filled in Media Type registry request that can complete the Media Types registration process including expert review in applicable cases.
  *   Registaration in this registry require that IANA request Media Types registration for the request type
  *   If the registration is granted IESG or Expert approval then the entry is added to the new registry.

I am not volunteering to write this document.

Cheers

Magnus Westerlund

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