MP3转码工具：Lame下载（命令行程序）
Lame主页：http://www.mp3dev.org/
http://lame.sourceforge.net/
下载链接在1楼底部。
这个是Lame转码工具，是个命令行程序，使用需要有命令行的使用基础。调用：
lame 命令参数 输入文件 -o 输出文件
我们经常需要用到的编码WAV为MP3命令参数是：
设置音质：
-qN N是音质参数，0到9。0是音质最好，9是编码最快。
这个命令指定了编码的侧重点，你要编码快一些还是音质好一些。
举例：
-q0（这个是音质好的）。
-q9（这个是速度快的）。
这里对音质的影响和位率不一样，它不影响文件大小。
-bN N是位率。最低8，最高320
这里对音质的影响非常大。位率8的音质不敢恭维，但是文件非常小。位率320的音质最好，但是产生的MP3文件一般都比较大。
一首6分钟的歌，如果位率是320，文件大小应该是16 MB左右。百度音乐下载到的“高品质”一般指的就是位率。
你要是实在拿不定注意，你就直接输-q0 -b320就行了。这个编码的是最好音质。
举例：
编码1.WAV到1.MP3，最好的音质：（最慢编码，最大文件）
lame -q0 -b320 1.WAV -o 1.MP3
编码2.WAV到2.MP3，最快编码，最小文件：（最烂音质）
lame -q9 -b8 2.WAV -o 2.MP3
这里我们用到的解码MP3为WAV的参数是：
--decode
解码很简单，这样的命令：
lame --decode 输入文件 -o 输出文件
举例：
将1.MP3解码为1.WAV：
lame --decode 1.MP3 -o 1.WAV
就可以了。
FAQ：
1、为什么提示文件没找到？
答：长文件名如果路径包含空格，那么你就必须用半角双引号将路径括起来，如下：
把D:\Halo 2 CD\1.WAV编码为D:\Halo 2 CD\1.MP3：
lame -q0 -b320 D:\Halo 2 CD\1.WAV -o D:\Halo 2 CD\1.MP3
这是不行的！
必须写成这样：
lame -q0 -b320 "D:\Halo 2 CD\1.WAV" -o "D:\Halo 2 CD\1.MP3"
这就OK啦。
exe下载地址(32位)：（版本：3.99.5）
http://www.rarewares.org/files/mp3/lame3.99.5.zip
exe下载地址(64位)：（版本：3.99.5）
http://www.rarewares.org/files/mp3/lame3.99.5-64.zip
论坛备份：（版本貌似是3.99）
http://pan.baidu.com/s/1bnqwRrL
源码下载地址：（版本：3.99.5）
http://nchc.dl.sourceforge.net/project/lame/lame/3.99/lame-3.99.5.tar.gz
Lame命令行
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<div style="float: left; white-space: pre; line-height: 1; background: #FFFFFF; "><span class="sc0">Microsoft Windows [版本 6.1.7601]
版权所有 (c) 2009 Microsoft Corporation。保留所有权利。
C:\Users\0xAA55>lame
LAME version 3.97 MMX (alpha 2, May 28 2004 06:00:28) (</span><span class="sc64">http://www.mp3dev.org/)</span><span class="sc0">
warning: alpha versions should be used for testing only
usage: lame <infile>
<infile> and/or <outfile> can be "-", which means stdin/stdout.
Try:
"lame --help" for general usage information
or:
"lame --preset help" for information on suggested predefined settings
or:
"lame --longhelp"
or "lame -?" for a complete options list
C:\Users\0xAA55>lame --longhelp
LAME version 3.97 MMX (alpha 2, May 28 2004 06:00:28) (</span><span class="sc64">http://www.mp3dev.org/)</span><span class="sc0">
warning: alpha versions should be used for testing only
usage: lame <infile>
<infile> and/or <outfile> can be "-", which means stdin/stdout.
RECOMMENDED:
lame -h input.wav output.mp3
OPTIONS:
Input options:
-r input is raw pcm
-x force byte-swapping of input
-s sfreq sampling frequency of input file (kHz) - default 44.1 kHz
--bitwidth w input bit width is w (default 16)
--mp1input input file is a MPEG Layer I file
--mp2input input file is a MPEG Layer IIfile
--mp3input input file is a MPEG Layer III file
--nogap <file1> <file2> <...>
gapless encoding for a set of contiguous files
--nogapout <dir>
output dir for gapless encoding (must precede --nogap)
--nogaptags allow the use of VBR tags in gapless encoding
Operational options:
-m <mode> (s)tereo, (j)oint, (f)orce, (m)ono
default is (s) or (j) depending on bitrate
force = force ms_stereo on all frames.
-a downmix from stereo to mono file for mono encoding
--freeformat produce a free format bitstream
--decode input=mp3 file, output=wav
-t disable writing wav header when using --decode
--comp<arg> choose bitrate to achive a compression ratio of <arg>
--scale <arg> scale input (multiply PCM data) by <arg>
--scale-l <arg> scale channel 0 (left) input (multiply PCM data) by <arg>
--scale-r <arg> scale channel 1 (right) input (multiply PCM data) by <arg>
--replaygain-fast compute RG fast but slightly inaccurately (default)
--replaygain-accurate compute RG more accurately and find the peak sample
--noreplaygaindisable ReplayGain analysis
--clipdetect enable --replaygain-accurate and print a message whether
clipping occurs and how far the waveform is from full scale
--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
Verbosity:
--disptime <arg>print progress report every arg seconds
-S don't print progress report, VBR histograms
--nohist disable VBR histogram display
--silent don'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 <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
CBR (constant bitrate, the default) options:
-b <bitrate> set the bitrate in kbps, default 128 kbps
--cbr enforce use of constant bitrate
ABR options:
--abr <bitrate> 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 n quality setting for VBR.default n=4
0=high quality,bigger files. 9=smaller files
-b <bitrate> specify minimum allowed bitrate, default32 kbps
-B <bitrate> 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
ATH related:
--noath turns ATH down to a flat noise floor
--athshort ignore GPSYCHO for short blocks, use ATH only
--athonly ignore GPSYCHO completely, use ATH only
--athtype n selects between different ATH types
--athlower x lowers ATH by x dB
--athaa-type nATH auto adjust types 1-3, else no adjustment
--athaa-loudapprox n n=1 total energy or n=2 equal loudness curve
--athaa-sensitivity xactivation offset in -/+ dB for ATH auto-adjustment
PSY related:
--short use short blocks when appropriate
--noshort do not use short blocks
--allshort use only short blocks
--cwlimit <freq>compute tonality up to freq (in kHz) default 8.8717
--notemp disable temporal masking effect
--nssafejoint M/S switching criterion
--nsmsfix <arg> M/S switching tuning
--interch x adjust inter-channel masking ratio
--ns-bass x adjust masking for sfbs0 -6 (long)0 -5 (short)
--ns-alto x adjust masking for sfbs7 - 13 (long)6 - 10 (short)
--ns-treble x adjust masking for sfbs 14 - 21 (long) 11 - 12 (short)
--ns-sfb21 x change ns-treble by x dB for sfb21
--shortthreshold x,yshort block switching threshold, x for L/R/M channel,
y for S channel
Noise Shaping related:
--substep n use pseudo substep noise shaping method types 0-2
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 toggles the scalefac-scale and subblock gain feature on
if n is set and minus, only scalefac-scale is enabled
MP3 header/stream options:
-e <emp> 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 <freq> frequency(kHz), lowpass filter cutoff above freq
--lowpass-width <freq>frequency(kHz) - default 15% of lowpass freq
--highpass <freq> frequency(kHz), highpass filter cutoff below freq
--highpass-width <freq> frequency(kHz) - default 15% of highpass freq
--resample <sfreq>sampling frequency of output file(kHz)- default=automatic
ID3 tag options:
--tt <title> audio/song title (max 30 chars for version 1 tag)
--ta <artist> audio/song artist (max 30 chars for version 1 tag)
--tl <album> audio/song album (max 30 chars for version 1 tag)
--ty <year> audio/song year of issue (1 to 9999)
--tc <comment>user-defined text (max 30 chars for v1 tag, 28 for v1.1)
--tn <track> audio/song track number (1 to 255, creates v1.1 tag)
--tg <genre> audio/song genre (name or number in list)
--add-id3v2 force addition of version 2 tag
--id3v1-only add only a version 1 tag
--id3v2-only add only a version 2 tag
--space-id3v1 pad version 1 tag with spaces instead of nulls
--pad-id3v2 pad version 2 tag with extra 128 bytes
--genre-list print alphabetically sorted ID3 genre list and exit
--ignore-tag-errorsignore errors in values passed for tags
Note: A version 2 tag will NOT be added unless one of the input fields
won't fit in a version 1 tag (e.g. the title string is longer than 30
characters), or the '--add-id3v2' or '--id3v2-only' options are used,
or output is redirected to stdout.
MS-Windows-specific options:
--priority <type> sets the process priority:
0,1 = Low priority (IDLE_PRIORITY_CLASS)
2 = normal priority (NORMAL_PRIORITY_CLASS, defau
lt)
3,4 = High priority (HIGH_PRIORITY_CLASS))
Note: Calling '--priority' without a parameter will select priority 0.
Platform specific:
--noasm <instructions> disable assembly optimizations for mmx/3dnow/sse
MPEG-1 layer III sample frequencies (kHz):324844.1
bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320
MPEG-2 layer III sample frequencies (kHz):162422.05
bitrates (kbps):8 16 24 32 40 48 56 64 80 96 112 128 144 160
MPEG-2.5 layer III sample frequencies (kHz): 81211.025
bitrates (kbps):8 16 24 32 40 48 56 64 80 96 112 128 144 160
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