Re: [AVTCORE] draft-hsyang-avtcore-rtp-haptics-02: Needs to register "haptics" as an SDP <media>

[Christer Holmberg <[e-mail]>]

Hi,

 

>The document making "haptics" a new top-level media type, coming out of the mediaman WG, has IETF

>consensus (see https://datatracker.ietf.org/doc/draft-ietf-mediaman-haptics/ <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fdraft-ietf-mediaman-haptics%2F&data=05%7C02%7Cchrister.holmberg%40ericsson.com%7C870c8c51c6b14d77c8a408dc4f3c58b1%7C92e84cebfbfd47abbe52080c6b87953f%7C0%7C0%7C638472367805840311%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=E0Kd3B9xCIkyhTi7DNfqNv4ZRH83j8x0OjEI7aKpzK0%3D&reserved=0> ).

> 

>Since RTP payload types follow media types, I don't think that decision needs be revisited here for SDP specifically.

 

RFC 8866 (SDP) says:

 

“The set of media types is intended to be small and SHOULD NOT be extended except under rare circumstances.”

 

Why is “haptics” considered a rare circumstance?

 

Now, draft-ietf-mediaman-haptics-05 does have some text on why “application” isn’t suitable. But, that text could be applied to many things, in my opinion.

 

Regards,

 

Christer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On Thu, Mar 28, 2024, 5:46 AM Christer Holmberg <[e-mail] <mailto:[e-mail]> > wrote:

Hi,

If this work is adopted I think there should be a discussion e.g., with MMUSIC whether the registration of a new media-type for this is the correct way, instead of using e.g., "application" (or even "data"). There should be some justification for using a new media type.

Regards,

Christer

> -----Original Message-----
> From: mmusic <[e-mail] <mailto:[e-mail]> > On Behalf Of Hyunsik Yang
> Sent: Wednesday, 13 March 2024 17.16
> To: Jonathan Lennox <[e-mail] <mailto:[e-mail]> >; IETF AVTCore WG
> <[e-mail] <mailto:[e-mail]> >; [e-mail] <mailto:[e-mail]> 
> Cc: [e-mail] <mailto:[e-mail]> ; Xavier De Foy <[e-mail] <mailto:[e-mail]> >
> Subject: Re: [MMUSIC] draft-hsyang-avtcore-rtp-haptics-02: Needs to register
> "haptics" as an SDP <media>
> 
> [Some people who received this message don't often get email from
> hyunsik.yang=[e-mail] <mailto:[e-mail]> . Learn why this is important
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> 
> Hello Jonathan!
> 
> First of all, Thanks for reviewing our draft and sharing feedback.
> 
> After our presentation during the IETF 118 meeting, we realized that the
> 'haptics' Top-level Media Type
> (https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatat <https://eur02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatat%2F&data=05%7C02%7Cchrister.holmberg%40ericsson.com%7C870c8c51c6b14d77c8a408dc4f3c58b1%7C92e84cebfbfd47abbe52080c6b87953f%7C0%7C0%7C638472367805852000%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C0%7C%7C%7C&sdata=5G4BS2MFWD8iX8gMBeRoUbZh57zebrT4Oq0VuEjdAFk%3D&reserved=0> 
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> haptics%2F&data=05%7C02%7Cchrister.holmberg%40ericsson.com <http://40ericsson.com> %7C4a91
> ee75e14f47a8b76608dc43708ea5%7C92e84cebfbfd47abbe52080c6b87953f
> %7C0%7C0%7C638459397909128782%7CUnknown%7CTWFpbGZsb3d8eyJW
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> 4u1JB9w%3D&reserved=0) was actually registering the haptic top-level type
> and multiple haptic subtypes (including HMPG) with IANA. That is why we
> modified the draft to update the HMPG subtype registration with IANA (in
> section 6) and refer to the mediaman draft.
> 
> Please let us know if there are any issues with this approach. It's based on our
> best guess, but we may miss something.
> Thanks
> Best regards
> 
> -----Original Message-----
> From: Jonathan Lennox <[e-mail] <mailto:[e-mail]> >
> Sent: Tuesday, March 12, 2024 5:25 PM
> To: IETF AVTCore WG <[e-mail] <mailto:[e-mail]> >; draft-hsyang-avtcore-rtp-
> [e-mail] <mailto:[e-mail]> 
> Cc: [e-mail] <mailto:[e-mail]> 
> Subject: draft-hsyang-avtcore-rtp-haptics-02: Needs to register "haptics" as an
> SDP <media>
> 
> Hi - I’ve read over the rtp-haptics draft, and wanted to send in e-mail one
> comment I’ve made verbally in meetings (but probably not too coherently):
> 
> This draft also needs to register the SDP <media> value “haptics”, so
> “m=haptics” can be sent in SDP.
> 
> See RFC 8866 section 8.2 (specifically 8.2.2) for the details on how this is
> done; see also RFC 6466 which registered “image” as an SDP <media>
> (though that was done under the previous version of the process from RFC
> 4566, which was slightly different).
> 
> I don’t see any reason this registration can’t be done as part of the current
> draft, but I’ve cc’d mmusic to keep that group aware that this is happening.
> 
> --
> Jonathan Lennox (as an individual)
> 
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