[vorbis] Ogg Vorbis Quality Analisis (+ bug) (+ misc)

[Craig Dickson]

Gian-Carlo Pascutto wrote:

> > One thing I have found is a bug, as it is cleary shown
> > by the blue lines.
> 
> Hmm, you mention you couldn't hear any difference even
> at -q0 with that file, so it could also be that Ogg can
> encode it perfectly with a minimal amount of bits :)

But the blue line sometimes goes _down_ from one -q to the next. Meaning
that Vorbis at -q X used _fewer_ bits than Vorbis at -q (X - 0.5). Is
that not strange? Is it not reasonable to expect that any given q value
will always use at least as many bits as any lower q value? How can
higher quality require fewer bits?

Craig

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