[vorbis] Speed!

[Olaf Marzocchi]

At 12.55 01/08/2002, you wrote:
>Hai!
>
>I'm from Hungary, and my English is not so good. Excuse me! I'm
>using Linux Debian woody, with kernel 2.4.18
>Now I try to encode my music files, that are in .wav format to .ogg
>format. I used to use the lame program to encode my music files to
>.mp3 format. I try it now on a Windows NT 4, and this 2 version:
>
>Lame version 3.92 MMX
>OggEnc v1.0 (libvorbis 1.0)
>
>I have a question, why is this procedure so slow, when I the same
>track.wav file, that I've encoded with oggenc and lame, with the
>same quality, then with oggenc it has taken 4:35 sec and with lame
>it has taken 1:49. Oggenc ist mor then 2 times slower. Is it
>possible with oggenc to encode a .wav file with 192 kbs, but a
>little bit faster???
>
>Theese are the command lines:
>lame -b 192 -m s -f track.wav track.mp3
>oggenc -q 7 -o track.ogg track.wav
>I've tried this one too: oggenc -b 192 -m 192 -M 192 -o track.ogg
>track.wav

If you downloaded LAME from mitiok's site you have an optimized 
(compile-time) version: it has been compiled with the Intel C compiler, 
that produces faster code than gcc on intel processors. For example (but I 
don't think it applies in this case), it automatically parallelize the code 
to use the vector unit (MMX, SSE or SSE2).

Anyway, I also noted this problem with oggenc, compared to LAME doing VBR 
mp3s (q=2).

Olaf

<p><olaf@ kjws.com> for every kind of mail, except spam! :-)

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