lame.1

MP3编码程序和资料

.TH lame 1 "November 8, 1999" " " "LAME audio compressor MP3 "
.SH NAME
lame \- create mp3 audio files
.SH SYNOPSIS
.nf
lame [options] <infile> <outfile>
.fi
.SH DESCRIPTION
.PP
Lame is a program which can be used to create compressed audio files.
(Lame aint MP3 encoder).   These audio files can be played back by popular 
mp3 players such as mpg123.  To read from stdin, use "-" for <infile>.
To write to stdout, use a "-" for <outfile>.

.SH OPTIONS
.TP
.BI -m  " mode"
 (s)tereo, (j)oint, (f)orce or (m)ono  (default j)
force = force mid/side stereo on all frames. 
.TP
.BI -b  " bitrate"
set the bitrate, default 128kbps
.TP
.BI -s " sample-freq"
frequency of input file (khz) - default 44.1
.TP
.BI --resample " sfreq"
sampling frequency of output file(kHz)- default=input sfreq
.TP
.BI --mp3input
input file is a MP3 file
.TP
.BI --voice
experimental voice mode
.TP
.BI -v
use variable bitrate (VBR)
.TP
.BI -V " n"
quality setting for VBR. Default n=4, 0=high quality,bigger files.
9=smaller files
.TP
.BI -b " <bitrate>"
specify minimum allowed bitrate for VBR, default 32kbs
.TP
.BI -B " <bitrate>"
specify miximum allowed bitrate for VBR, default 256kbs
.TP
.BI -t
disable Xing VBR informational tag
.TP
.BI --nohist
disable VBR histogram display

.TP
.BI -h
slower, but (maybe) higher quality
.TP
.BI -f
fast mode (low quality)
.TP
.BI -k
disable sfb=21 cutoff
.TP
.BI -d
allow channels to have different blocktypes
.TP
.BI --athonly
only use the ATH for masking
.TP
.BI -r
input is raw pcm
.TP
.BI -x
force byte-swapping of input
.TP
.BI -a
autoconvert from stereo to mono file for mono encoding
.TP
.BI -e " emp"
de-emphasis n/5/c  (default: n)
.TP
.BI -p
add CRC error protection (adds additional 16bits per frame to stream)
.TP
.BI -c
mark as copyright
.TP
.BI -o
mark as non-original (i.e. do not set the original bit)
.TP
.BI -S
don't print progress report, VBR histograms
.TP
.BI -g
run graphical analysis on <infile>.  <infile> can also be a .mp3 file.
(This feature is a compile time option. Your binary may for speed reasons be
compiled without this.)



.SH EXAMPLES
.LP
Recommended way to create a fixed 128kbs mp3 file from a wav file
.IP
.B lame -h
.I foo.wav foo.mp3
.LP
Copy track 7 from a regular audio CD, using cdparanoia

.IP
.B cdparanoia 7 foo.wav  ;
.B  lame -h foo.wav foo.mp3

.LP
Copy track 7 from a regular audio CD with cdda2wav, where the cdrom device is
device /dev/cdrom to an mp3 file foo.mp3

.IP
.B cdda2wav \-O
.I wav
.B \-t 7 \-D
.I /dev/cdrom
.I \-
.B  | lame 
.I \- foo.mp3

.IP

.LP
Streaming from stereo 44.1kHz raw pcm data, encoding mono
at 16kHz.  (you may or may not need the -x option):
.IP
cat inputfile | lame -a -x -r -m m -s 44.1 --resample 16 -b 24  - - > output
.IP



.SH BUGS
.PP
Quality is much better than encoders based on the ISO routines,
but still not as good as the FhG encoder.
.SH SEE ALSO
.BR mpg123 (1) ,
.BR cdparanoia (1) ,
.BR cdda2wav (1) ,
.BR sox (1)
.SH AUTHORS
.nf
LAME originally developed by Mike Cheng and now maintained by
Mark Taylor.  GPSYCHO psycho-acoustic model by Mark Taylor.
(http://www.sulaco.org/mp3).
mpglib by Michael Hipp
Manual page by William Schelter, Nils Faerber
.f