Date: Wed, 21 Jul 1999 22:03:46 -0700 From: Chris Piazza <cpiazza@home.net> To: "James C. Durham" <durham@w2xo.pgh.pa.us> Cc: "Daniel J. O'Connor" <doconnor@gsoft.com.au>, freebsd-multimedia@FreeBSD.ORG Subject: Re: Blade Encoder speed Message-ID: <19990721220346.A3006@norn.ca.eu.org> In-Reply-To: <37953B26.7C7A57C8@w2xo.pgh.pa.us>; from James C. Durham on Tue, Jul 20, 1999 at 11:14:46PM -0400 References: <XFMail.990721130459.doconnor@gsoft.com.au> <37953B26.7C7A57C8@w2xo.pgh.pa.us>
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On Tue, Jul 20, 1999 at 11:14:46PM -0400, James C. Durham wrote:
> "Daniel J. O'Connor" wrote:
> >
> > You should express the compression time as a ratio of realtime to play vs
> > compression time..
> >
> > I find I can get about 1:1 on a PII-350. I think the compressors for Windows
> > are much more optmized, or so it would seem..
> >
>
> Hmmm.. In those terms, I'm saying that 3 minutes
> of play time (using the default 128K rate) takes
> about 15 minutes , or 5:1 .
>
> I'm loathe to have to boot M$ to encode. However,
> I have hundreds of hours of old audio tape I'd like
> to encode before it falls apart, but at that speed,
> it becomes a grueling task 8-) .
Ouch.. I've never encoded an mp3 before so I thought
I'd take a stab at it. Here are my results.
I have a K6-2 350 w/ 128mb of ram (running -current)
using the 'gogo no coder' port (ports/audio/gogo)
which includes 3D-Now! optimisations so that may help.
The track is 8:12 long (a nice tune from the rave
scene in '92, btw). Encoded at 128kbps, the output
from the encoder is below (mostly in Japanese so excuse
the mess :):
norn[~/mp3]% gogo trip_ii_the_moon.wav out.mp3
午後のこ〜だ ver.0606
3D Now! is available.
ファイル入力形式 : RIFF-WAVE FMT
再生周波数 : 44100 Hz
入力チャネル : 2 ch
入力サイズ(byte) : 87081984 byte
データ始点(byte) : 44 byte
MPEG 1, layer 3, 聴覚心理 2, ステレオモード
周波数=44.1kHz 全ビットレート=128kbps
エラー保護[無効]
入力ファイル名 `trip_ii_the_moon.wav'
出力ファイル名 `out.mp3'
frac SpF=0.959 slots/frame = 417
音声データの読み込み終了 (x 0.72) re:[00:00:00] to:[00:05:54]
平均 slots/frame = 417.959; b/smp = 2.90; br = 128.000 kbps
エンコード終了
passed time= 354.18sec
354:492 = 0.71:1.. not bad. (The quality is good too, btw ;-)
-Chris
--
cpiazza@home.net cpiazza@FreeBSD.org
"I don't like principles. I prefer prejudices."
-Oscar Wilde
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