[vorbis] Encoding speed reports (was: Choosing a processor)

[Segher Boessenkool]

Beni Cherniavsky wrote:
> 
> On Tue, 29 May 2001, Segher Boessenkool wrote:
> 
> > > Keeping it on topic, Oggenc encodes at 4.2 times normal
> > > speed on my 1GHz Athlon.
> >
> >
> > It does that on a G4 500MHz as well :-)
> >
> > Ciao,
> >
> > Segher
> >
> For clarity, all reports of encoding speed should indicate what and how
> was encoded, or a default standard should be agreed upon:
> - The encoding time is proportional to the number of channels (with same
>   bitrate per channel).  Mono is the natural default but maybe stereo is
>   better as people frequenlty rip CDs.
> - The "X times normal speed" measure should also be propotional to the
>   sampling rate.  44100 is the obvious default.
> - Bits per sample hardly affect anything (unless the HD is the
>   bottleneck).
> - Does the target bitrate (encoder mode) affect the speed?
> 
> If these are not agreed upon nor specified in speed reports, the data is
> meaningless.

Standard oggenc settings:
16bit stereo 44.1kHz, 128kbps.

The settings don't affect encoding speed much, really.

And _of course_ it's stereo; Vorbis is a music codec.

Cheers,

Segher

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