[vorbis] RC2 better than RC3 ???

[MARK JAMES HETHERINGTON]

As I understand it quality=0.0 isn't necessarily 64k bitrate. That's
it's nominal bitrate, but it is likely to end up less then that (so the
file is actually not 64k bitrate). Check the size of the files at q=0.5,
it's likely that their average bitrate is more like 64k, and that is why
they sound as good as rc2 @ 64k. Another thing you could use to compare
is using -b 64, to see how it sounds, since the quality system works
differently to rc2's system.

I'm encoding my OGGs at q=5, giving me a nice file size (The files had
to be much bigger in mp3s for me to put up with the quality), and
excellent sound.

One thing: Is it possible to encode files with greater than 2 audio
channels? Also how are the channels identified? i.e. How can an encoder
work out "left-front" "center" "Low Frequency Effects" "right-rear"??

Mark

----- Original Message -----
From: Manu/NVO <ereisser at wanadoo.fr>
Date: Tuesday, January 15, 2002 5:39 am
Subject: [vorbis] RC2 better than RC3 ???

> Since 1.0rc2 was released i have found that ogg at 64k
> sounds almost like  mp3 at 128k (in 95% of the 3000 files i encoded...)
> 
> I tested 1.0rc3 and 64k bitrate (quality=0.0) gives
> less good quality than before.
> And bad : it takes longer to encode !
> (1.7x vs. 2.0x on a P2/500MHz)
> 
> Effectively 64k ogg files encoded with rc3 are smaller than
> files encoded with rc2.
> I hear people debatting on how satisfied they are encoding
> files at quality=3 or 5 or 10 !
> 
> The way i think vorbis format is superior to any other format is not
> quality :
> you already get quality with all other formats at medium/high bitrates
> Ogg gives quality at very low bitrates, and THIS is the most
> important to my eyes !!
> 
> Anyway i need to encode at least at 72k (quality=0.5) with rc3 to
> have the same feeling i used to have with rc2 at 64k !!!
> 
> Emmanuel (aka nvo98xp)
> 
> 
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