[vorbis] CVS RC4 -q0 too good!

[Mark Hetherington]

I haven't been able to get vorbis to compile from CVS, I checked out the 
source today, and had little luck from my first CVS experience... I did get 
icecast2 to compile (but not ices2!)

Anyway, I think it may be useful to be able to encode some exteremly low 
bitrates, either for modem transfer (I know you can use managed bitrates 
instead), or just for interests sake. I guess I can't see any *really* 
convincing reasons for it though.

I'm wonder how close to bit identical it would be if you encoded a vorbis file 
at 600+kbps.... In fact I might examine that....

MArk

On Thu, 4 Jul 2002 21:01, Moritz Grimm wrote:
> Mark Hetherington wrote:
>
> Patching oggenc (oggenc/oggenc.c) around row 680, commenting out the
> lines checking that q values aren't lower than 0, allows you to use -q
> -1 which currently gives the 48kbps nominal mode. That's how it is right
> now, but for the sake of consistency, I'd second the old scale from 0 to
> 10 (or maybe 0 to 11?). We don't care about bitrates anyways, so q ==
> quality makes most sense, imo.
>
>
> Afaik, Vorbis has no theoretical limit in bitrate - it could go up to
> anywhere ... a realistic upper limit would propably be around 700-800
> kbps, which would be a compression ratio of ~50-60%; something that
> lossless codecs achieve on some, i.e. most music.
>
>
> Moritz
>
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