[vorbis] Low sample rates / bit rates

[Michael Smith]

At 09:06 PM 11/20/00 -0800, you wrote:
>Hey guys. I think Vorbis is pretty cool, but since the current OggEnc only
offers 44.1kHz, it

Wrong. Oggenc supports different sample rates correctly. Libvorbis itself
also supports different sample rates, but is tuned for 44.1kHz, so other
things aren't handled optimally yet (the information on sample rates is fed
through to the encode engine, it just doesn't do all that much with it yet).

Last I checked, lame still didn't have updated vorbis support - has this
changed recently? If not, it's possibly worse than oggenc at different
sample rates. It most likely isn't any different.

>number of 22kHz/56kbps MP3s floating around.) What sort of changes would
need to be made to enable
>encoding of all sample rates? And I must also mention that "lame --ogg
-v4" outshines "lame -b32"
>in this realm, & is comparable to "lame -V8".

It already allows encoding of different sample rates - but a lot more
changes will be needed for optimal performance at these bitrates and sample
rates (changes in the codebooks, the psychoacoustics, etc.) It'll be done
eventually, but finishing off the 1.0 feature list is higher in priority
than tuning for other sampling frequencies, I think.

What does -v4 do? I thought lame just ignored all the options when encoding
vorbis. Maybe this did get updated.

Michael

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