[ogg-dev] Re: Updating the Ogg mapping for Dirac

xiphmont at xiph.org xiphmont at xiph.org
Thu Feb 28 10:16:16 PST 2008


On Thu, Feb 28, 2008 at 1:53 AM, Ralph Giles <giles at xiph.org> wrote:
> On 27-Feb-08, at 10:44 PM, Conrad Parker wrote:
>
>  > Sure: I'm thinking about Ogg demuxers and seeking implementations.
>  > These need to know the framerate in order to be able to interpret the
>  > granulepos in terms of time. If they did not have to extract that from
>  > the sequence header, but could just read it directly out of le32
>  > fields in the bos page, there would be less room for error.
>
>  How is this better than reading he same info out of a fishbone packet?

The 'shim' paradigm does not use fishbone.  The Ogg spec currently
needs information necessary to interpret granulepos and granpos
indexing in the initial header...

Monty


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