[vorbis-dev] ogg pic format (again).. here's why

[Olaf van der Spek]

----- Original Message -----
From: <rillian at telus.net>
To: "Gerry" <gerry at c64.org>
Cc: <vorbis-dev at xiph.org>
Sent: Friday, January 26, 2001 11:13 PM
Subject: Re: [vorbis-dev] ogg pic format (again).. here's why

> > The ogg video-format [...]needs a way to compress its
> > frames. Are you going to use MNG for that ? :) ..
>
> No. The advantage of MNG is that it offers lossless compression if you
want
> it. Tarkin will be a (very) lossy encoder specifically for video; the
design
> requirements there are quite different and are best implemented as a
separate
> format.
>
> MNG can be used as a high quality "source" format for video such as one
needs
> for editing and effects work. Tarkin would be the final output format for
electronic
> distribution.
>
> It was also my proposal that we use MNG for overlays on top of tarkin
video,
> a la DVD subtitles. With text and other annotations the lossless nature
and
> support of limited color palettes is a real win. And because of jng,
there's
> support for lossy continuous-tone images as well. (think "pop-up-video")

AFAIK MNG doesn't support paletized images.

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