[vorbis-dev] RFC draft for Vorbis over RTP

[Aaron Colwell]

On Thu, May 27, 2004 at 11:45:30AM +0800, illiminable wrote:
> 
> ----- Original Message ----- 
> From: "Aaron Colwell" <acolwell at real.com>
> To: <vorbis-dev at xiph.org>
> Sent: Thursday, May 27, 2004 7:29 AM
> Subject: Re: [vorbis-dev] RFC draft for Vorbis over RTP
> 
> 
> > One solution that could help the codebook administration problem that I
> > mentioned is to specify an offset and size with the URL. Then the URL can
> just
> > be an HTTP url to the source file and the offset and size can allow you to
> grab
> > the codebook chunk right out of it assuming you are using HTTP 1.1. The
> > streaming server will likely know where the codebook is in the file so you
> > don't have to worry about keeping the codebook and ogg file in sync with
> > eachother. For live streams you can just put the codebook in a file and
> use
> > a 0 offset.
> >
> > I'll think about the HTTP solution a little more and see if I can think of
> any
> > other problems or benefits of this solution.
> >
> 
> The only problem with the grab a byte offset chunk is that it assumes that
> the codebook is a contiguous chunk of data, if it is then it's true a byte
> offset and length wouold be able to specificy the packet within the page
> framing and pluck it out neatly.
> 
> Unfortunately, it is possible for the codebook to extend over multiple
> pages, many ogg vorbis files have the codebook spanning over two pages,
> which means that the server would actually have to know how to read the ogg
> page headers and put together spanning packets.

Good point. I forgot about that. :)

> 
> Zen.
> 
> 
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