[theora] A comparison of VP3, and two MPEG-4 variants

[Dan Miller]

well we can agree to disagree.  There is no reason why a properly designed multi-pass encoder cannot compress a file to a very close approximation of the desired total bit allocation using a fixed-Q approach.  At worst, it may dither between two sequential Q values simply because the codec's Q levels are too coarse.

 ___  Dan Miller
(++,) Founder, CTO, On2 Technologies 

> -----Original Message-----
> From: Christoph Lampert [mailto:chl at math.uni-bonn.de]
> Sent: Monday, March 24, 2003 5:53 PM
> To: theora at xiph.org
> Subject: RE: [theora] A comparison of VP3, and two MPEG-4 variants
> 
> 
> On Mon, 24 Mar 2003, Dan Miller wrote:
> 
> > 2-pass encoding may still imply constant Q.  The problem is to find
> > the right Q; it's not necessary to vary it over the whole file.
> 
> I doubt it.
> 
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to 
> 'theora-request at xiph.org'
> containing only the word 'unsubscribe' in the body.  No 
> subject is needed.
> Unsubscribe messages sent to the list will be ignored/filtered.
> 
--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'theora-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.