[theora-dev] Extension to Skeleton for multi-track media

Silvia Pfeiffer silviapfeiffer1 at gmail.com
Mon Apr 26 17:33:48 PDT 2010

On Tue, Apr 27, 2010 at 8:35 AM, Chris Pearce <chris at pearce.org.nz> wrote:
> On 23/03/2010 6:43 p.m., Silvia Pfeiffer wrote:
>> Discussions about a need for an extension to Skeleton to cater for
>> multi-track media files has been going on for a while. In a recent
>> thread here, in discussions on IRC, and at FOMS between Jan, Ralph,
>> Viktor and I, we discussed some fields. Viktor and I continued that
>> discussion to make more specific recommendations on what fields to
>> add.
>> We now have a wiki page at http://wiki.xiph.org/SkeletonHeaders that
>> has aggregated all the different things that were discussed.
> Other than the the message header fields at the wiki page above, is there a
> list somewhere of the fields you'd like to see added to the skeleton track?

That's the list.

> Do you want any of the above fields to be compulsory in the next version of
> Skeleton?

* Content-type (already is)
* Role
* Name

* Language
* Title
* Display-Hint
* Altitude (or should we still change this to z-index or maybe
Display-Altitude ?)

> It looks like all of those headers would be specified in the
> fisbone packet, which I don't need to change for indexing.

Yes, that's true.

> They also look
> like they're variable length anyway, so including them as message fields
> makes perfect sense.


> I'm trying to nail down a spec for the indexing-related stuff for a skeleton
> 4.0 track, and it would be great if we could produce a unified spec with all
> the changes we both want for a skeleton 4.0 track. :)

I can just add the fields into the wiki page for skeleton - that won't
be difficult. Or did you want a formal spec such as an update of the
I-D ? Happy to help with either.

Thanks so much for taking control of this!


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