remix

[taro@fitPC2i lame]$ ll
合計 1412
-rw-rw---- 1 taro apache 1445348  2月 29 04:00 2012 lame-3.99.5.tar.gz
[taro@fitPC2i lame]$ tar zxvf lame-3.99.5.tar.gz
	：
[taro@fitPC2i lame]$ ll
合計 1416
drwxr-x--- 15 taro apache    4096  2月 29 03:56 2012 lame-3.99.5
-rw-rw----  1 taro apache 1445348  2月 29 04:00 2012 lame-3.99.5.tar.gz

●『lame』のコンパイル

[taro@fitPC2i lame]$ cd lame-3.99.5

[taro@fitPC2i lame-3.99.5]$ ./configure

	：


[taro@fitPC2i lame-3.99.5]$ su

パスワード:

[root@fitPC2i lame-3.99.5]# make install

Making install in mpglib

	：

[root@fitPC2i lame-3.99.5]# exit

exit

●インストール完了

[root@fitPC2i lame-3.99.5]# cd ~/

[taro@fitPC2i ~]$ which lame

/usr/local/bin/lame

●コマンドの使い方

[taro@fitPC2i ~]$ lame --longhelp

LAME 32bits version 3.99.5 (http://lame.sf.net)


usage: lame [options] <infile> [outfile]

    <infile> and/or <outfile> can be "-", which means stdin/stdout.

RECOMMENDED:

    lame -V2 input.wav output.mp3

OPTIONS:

  Input options:

    --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>

    --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 <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

  Input options for RAW PCM:

    -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)

    --signed        input is signed (default)

    --unsigned      input is unsigned

    --little-endian input is little-endian (default)

    --big-endian    input is big-endian



  Operational options:

    -a              downmix from stereo to mono file for mono encoding

    -m <mode>       (j)oint, (s)imple, (f)orce, (d)ual-mono, (m)ono (l)eft (r)ight

                    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  <arg>   choose bitrate to achieve a compression ratio of <arg>

    --replaygain-fast   compute RG fast but slightly inaccurately (default)

    --replaygain-accurate   compute RG more accurately and find the peak sample

    --noreplaygain  disable ReplayGain analysis

    --clipdetect    enable --replaygain-accurate and print a message whether

                    clipping occurs and how far the waveform is from full scale

    --flush         flush output stream as soon as possible

    --freeformat    produce a free format bitstream

    --decode        input=mp3 file, output=wav

    --swap-channel  swap L/R channels

    -t              disable writing wav header when using --decode



  Verbosity:

    --disptime <arg>print progress report every arg seconds

    -S              don't print progress report, VBR histograms

    --nohist        disable VBR histogram display

    --quiet         don't print anything on screen

    --silent        don't print anything on screen, but fatal errors

    --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 n            quality setting for VBR.  default n=4

                    0=high quality,bigger files. 9=smaller files

    -v              the same as -V 4

    --vbr-old       use old variable bitrate (VBR) routine

    --vbr-new       use new variable bitrate (VBR) routine (default)

    -Y              lets LAME ignore noise in sfb21, like in CBR

    -b <bitrate>    specify minimum allowed bitrate, default  32 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



  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

    --buffer-constraint <constraint> available values for constraint:

                                     default, strict, maximum

  Filter options:

  --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[/total]>   audio/song track number and (optionally) the total

                           number of tracks on the original recording. (track

                           and total each 1 to 255. just the track number

                           creates v1.1 tag, providing a total forces v2.0).

    --tg <genre>    audio/song genre (name or number in list)

    --ti <file>     audio/song albumArt (jpeg/png/gif file, v2.3 tag)

    --tv <id=value> user-defined frame specified by id and value (v2.3 tag)

    --add-id3v2     force addition of version 2 tag

    --id3v1-only    add only a version 1 tag

    --id3v2-only    add only a version 2 tag

    --id3v2-utf16   add following options in unicode text encoding

    --id3v2-latin1  add following options in latin-1 text encoding

    --space-id3v1   pad version 1 tag with spaces instead of nulls

    --pad-id3v2     same as '--pad-id3v2-size 128'

    --pad-id3v2-size <value> adds version 2 tag, pad with extra <value> bytes

    --genre-list    print alphabetically sorted ID3 genre list and exit

    --ignore-tag-errors  ignore 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.

Misc:

    --license       print License information



MPEG-1   layer III sample frequencies (kHz):  32  48  44.1

bitrates (kbps): 32 40 48 56 64 80 96 112 128 160 192 224 256 320

MPEG-2   layer III sample frequencies (kHz):  16  24  22.05

bitrates (kbps):  8 16 24 32 40 48 56 64 80 96 112 128 144 160

MPEG-2.5 layer III sample frequencies (kHz):   8  12  11.025

bitrates (kbps):  8 16 24 32 40 48 56 64

●例：モノラル、ID3タグ アーチスト名 "TOKYO FM"、固定ビットレート48kbps

[taro@fitPC2i ~]$ lame -b 48 -m m --ta "TOKYO FM" AD13051423.wav

LAME 3.99.5 32bits (http://lame.sf.net)

Resampling:  input 44.1 kHz  output 32 kHz

Using polyphase lowpass filter, transition band: 10968 Hz - 11355 Hz

Encoding AD13051423.wav to AD13051423.mp3

Encoding as 32 kHz single-ch MPEG-1 Layer III (10.7x)  48 kbps qval=3

    Frame          |  CPU time/estim | REAL time/estim | play/CPU |    ETA

 99914/99914 (100%)|    7:31/    7:31|    7:34/    7:34|   7.9694x|    0:00

-------------------------------------------------------------------------------

   kbps       mono %     long switch short %

   48.0      100.0        94.1   3.2   2.7

Writing LAME Tag...done

ReplayGain: -15.3dB

モノラルなので固定ビットレートは通常の半分。

『午後のこーだ』に比べ、エンコードはかなり遅い。モノラル１時間で７分３１秒。
（Ｗｉｎ７稼動時のパフォーマンス評価、プロセッサ2.3、メモリ4.3、ハードディスク4.2）

●環境
CentOS release 6.2 (Final)