Re: Fwd: Re: [AVT] Re: New I-Ds for Ogg technologies (Vorbis overRTP, Ogg file format, Mimetypes)

[Stephen Casner <casner@acm.org>]

On Mon, 27 Jan 2003, Linus Walleij wrote:

> On Fri, 24 Jan 2003, Harald Tveit Alvestrand wrote:
>
> > 2) how to make sure no two codecs pick the same identifier string?
> > (the "registry" problem)
>
> This is a natural pointer to the IANA, in case you want to establish
> something rock-solid. Not that I know if they would like to do this, but
> it it is to be a widely accepted standard for codec identification, IANA
> would be the place to store the strings.

I agree.  And my take is that therefore ogg should not be a MIME
subtype.  Instead, vorbis should be a MIME subtype, and ogg should be
(an aspect of) one encoding for the vorbis subtype, just like the RTP
payload format is another encoding for the vorbis subtype.

The MIME registration for vorbis can explain these different
encodings, and can give the "magic number" string which can be the
same as the MIME subtype name (and therefore unique).

> Alternatively, you could list the magic strings available today, and
> require extensions to file further informational RFCs for the additions.
> (Sort of sticky and slow in comparison to IANA handling it.)

The magic strings already in use would need to be registered as MIME
subtypes (assuming no conflicts with subtypes already registered).

                                                        -- Steve

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