[icecast] quality setting vs cpu utilisation

Michael Smith msmith at labyrinth.net.au
Fri Mar 22 05:45:23 PST 2002



At 02:54 PM 3/22/02 +0200, you wrote:
>I only have a 4% cpu utilisation decrease  when setting quality to 1 
>(0.1) against setting quality to 9.
>Is this normal ?

Yes. 

>Also I don't see any CPU % decrease when lowering bitrates (on managed 
>modes)
>The only things that realy reduce the cpu usage is sample rate and 
>number of channels.

That's correct. Vorbis doesn't have any options to do things the fast
way (and thus get lower quality) - it does things the 'best' way all
the time. 

>
>I am a little used with lame which with a quality setting of 9 (aka 0.1 
>in vorbis_enc) greatly reduce CPU usage.
>
>P.S. How can Vorbis Stereo modes can be selectable by user ?
>I readed in stereo.html (from docs) that this modes are user selectable 
>but I didn't see any api reference.
>

In rc3, stereo modes are not user-selectable.

Michael

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