[PD] About shoutcast~ linux versions

Yves Degoyon ydegoyon at free.fr
Thu Nov 29 18:13:38 CET 2001


hi,

> 
> >  |the linux version still has a problem :
> >  |resampling does not work,
> >  |you have to use 44100 Hz.
> > 
> > which might be a problem for lower bitrate streams?
> > 96kbit did still work with 44.1 samplerate, but i think below that
> > the encoder soon requires lower samplerates as well.

i did some more testing with shoutcast~.
in fact, the situation's not so bad, resampling will work 
for the values accepted by lame,
these allowed combinations of samplerate/bitrate are :

ALLOWED SAMPLERATE/BITRATES

MPEG-1   layer III sample frequencies (kHz):  32  48  44.1
bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320

MPEG-2   layer III sample frequencies (kHz):  16  24  22.05
bitrates (kbps):  8 16 24 32 40 48 56 64 80 96 112 128 144 160

MPEG-2.5 layer III sample frequencies (kHz):   8  12  11.025
bitrates (kbps):  8 16 24 32 40 48 56 64 80 96 112 128 144 160

be aware that if you use higher samplerates, you'll need more CPU power.

Also, about quality factor, here are the values to use :

ALLOWED QUALITY FACTOR :

    -q <arg>        <arg> = 0...9.  Default  -q 5 
                    -q 0:  Highest quality, very slow 
                    -q 9:  Poor quality, but fast 
    -h              Same as -q 2.   Recommended.
    -f              Same as -q 7.   Fast, ok quality

so, -f stands for quality 7, and the higher is this factor,
the poorer is the quality.

these informations are taken from lame's 3.89 man page.

cheers,

Yves/

PS : these informations should be added to the readmes ( for Windows and Linux ).





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