[请教]请问现在lame默认压缩都是混合立体声的，难道比立体声要好吗？

引用

最初由 superkidx 发布
noath 根本没有这个

LAME 32bits version 3.97 (http://www.mp3dev.org/)

usage: D:\music\RazorLame\lame.exe [options] [outfile]

and/or can be "-", which means stdin/stdout.

RECOMMENDED:
lame -V2 input.wav output.mp3

OPTIONS:
Input options:
-r input is raw pcm
-x force byte-swapping of input
-s sfreqsampling frequency of input file (kHz) - default 44.1 kHz
--bitwidth winput bit width is w (default 16)
--scale scale input (multiply PCM data) by
--scale-l scale channel 0 (left) input (multiply PCM data) by
--scale-r scale channel 1 (right) input (multiply PCM data) by
--mp1input input file is a MPEG Layer I file
--mp2input input file is a MPEG Layer II file
--mp3input input file is a MPEG Layer III file
--nogap <...>
gapless encoding for a set of contiguous files
--nogapout
output dir for gapless encoding (must precede --nogap)
--nogaptags allow the use of VBR tags in gapless encoding

Operational options:
-a downmix from stereo to mono file for mono encoding
-m (j)oint, (s)imple, (f)orce, (d)dual-mono, (m)ono
default is (j) or (s) depending on bitrate
joint = joins the best possible of MS and LR stereo
simple = force LR stereo on all frames
force = force MS stereo on all frames.
--preset type type must be "medium", "standard", "extreme", "insane",
or a value for an average desired bitrate and depending
on the value specified, appropriate quality settings will
be used.
"--preset help" gives more info on these
--comp choose bitrate to achive a compression ratio of
--replaygain-fast compute RG fast but slightly inaccurately (default)
--replaygain-accurate compute RG more accurately and find the peak sample
--noreplaygain disable ReplayGain analysis
--clipdetectenable --replaygain-accurate and print a message whether
clipping occurs and how far the waveform is from full scale
--freeformatproduce a free format bitstream
--decodeinput=mp3 file, output=wav
-t disable writing wav header when using --decode


Verbosity:
--disptime print progress report every arg seconds
-S don't print progress report, VBR histograms
--nohistdisable VBR histogram display
--silentdon't print anything on screen
--quiet don't print anything on screen
--brief print more useful information
--verbose print a lot of useful information

Noise shaping & psycho acoustic algorithms:
-q = 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


CBR (constant bitrate, the default) options:
-b set the bitrate in kbps, default 128 kbps
--cbr enforce use of constant bitrate

ABR options:
--abr specify average bitrate desired (instead of quality)

VBR options:
-v use variable bitrate (VBR) (--vbr-old)
--vbr-old use old variable bitrate (VBR) routine
--vbr-new use new variable bitrate (VBR) routine
-V nquality setting for VBR. default n=4
0=high quality,bigger files. 9=smaller files
-b specify minimum allowed bitrate, default 32 kbps
-B specify maximum allowed bitrate, default 320 kbps
-F strictly enforce the -b option, for use with players that
do not support low bitrate mp3
-t disable writing LAME Tag
-T enable and force writing LAME Tag


PSY related:
--short use short blocks when appropriate
--noshort do not use short blocks
--allshort use only short blocks
--notempdisable temporal masking effect
--nssafejoint M/S switching criterion
--nsmsfix M/S switching tuning [effective 0-3.5]
--interch x adjust inter-channel masking ratio
--ns-bass x adjust masking for sfbs 0 - 6 (long) 0 - 5 (short)
--ns-alto x adjust masking for sfbs 7 - 13 (long) 6 - 10 (short)
--ns-treble x adjust masking for sfbs 14 - 21 (long) 11 - 12 (short)
--ns-sfb21 xchange ns-treble by x dB for sfb21


experimental switches:
-X n[,m]selects between different noise measurements
n for long block, m for short. if m is omitted, m = n
-Y lets LAME ignore noise in sfb21, like in CBR
-Z [n] currently no effects


MP3 header/stream options:
-e de-emphasis n/5/c (obsolete)
-c mark as copyright
-o mark as non-original
-p error protection. adds 16 bit checksum to every frame
(the checksum is computed correctly)
--nores disable the bit reservoir
--strictly-enforce-ISO comply as much as possible to ISO MPEG spec

Filter options:
-k keep ALL frequencies (disables all filters),
Can cause ringing and twinkling
--lowpass frequency(kHz), lowpass filter cutoff above freq
--lowpass-width frequency(kHz) - default 15% of lowpass freq
--highpass frequency(kHz), highpass filter cutoff below freq
--highpass-width frequency(kHz) - default 15% of highpass freq
--resample sampling frequency of output file(kHz)- default=automatic


ID3 tag options:
--tt