[theora] Indexing Ogg files for faster seeking

[Silvia Pfeiffer]

Further - it actually encourages the implementation of Skeleton
support. Thus we catch to birds with one stone.

Cheers,
Silvia.

2009/9/24 Ivo Emanuel Gonçalves <justivo at gmail.com>:
> On 9/24/09, Chris Pearce <chris at pearce.org.nz> wrote:
>> (...) and we won't break existing decoders which expect the skeleton
>> to be encoded in  the current format. Best to not break skeleton if possible.
>
> Not necessarily.  In fact, I predict the opposite.  Skeleton is a very
> recent addition in the Ogg world, and most current decoders don't
> interact with it -- they play the Theora/Vorbis/whatever ignoring the
> Skeleton because they don't recognize it.
>
> Moreover, there are one or two buggy parsers out there that actually
> refuse to read the entirety of the Ogg file because they expected the
> file to begin with a Theora or a Vorbis stream.
>
> When you add yet another stream to the mix which, if I read the spec
> properly, starts before Skeleton, when decoders are just now
> understanding that the initial stream is the one that pin-points all
> of the content within the Ogg... well, it will get messy.
>
> However, were this index idea an expansion on Skeleton, you would
> remove the unecessary complexity of adding yet another metadata stream
> to the mix and build on what exists.  Win-win, I say.
>
> -Ivo
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