bladeenc.html

功能非常完善的MP3编译码器,输入文件WAV或AIFF,能够方便的嵌入到你自己的系统当中.

encode track1.wav and send the mp3 file through the standard output stream.</i>
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<li>
And all this can be combined into one big operation.</li>

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<p>&nbsp;
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<p>Example: <b><tt>bladeenc -160 track1.wav stdout -mono track2.wav track3.wav
output.mp3 -crc stdin stdout -112 </tt></b><i>will do all the following:
Encode track1.wav into a 160 kBit mono mp3 that is sent to stdout. Encode
track2.wav into a 160 kBit mp3 named track2.mp3. Encode track3.wav into
a 160 kBit mp3 with CRC named output.mp3. Encode what comes through the
stdin into a 112 kBit mp3 that is appended to the data that is allready
sent to stdout.</i></ol>

<p><br><font size=+2>Commandline Switches</font>
<p>All commandline switches are case-insensitive, so you can enter them
in either upper- or lower-case.
<br>&nbsp;
<table BORDER CELLSPACING=0 CELLPADDING=8 >
<tr>
<td VALIGN=TOP>-[bitrate],
<br>-br [bitrate]</td>

<td>Defines the bitrate for the MP3-file. Higher bitrates gives better
quality, but also bigger files. Most people prefer to generate 128 kBit
MP3s. Please note that it's the total bitrate that is specified, so if
you're generating a stereo MP3-file at 128 kBit you get 64 kBit for left
channel and 64 kBit for the right channel. The default setting is 128 kBit
for stereo files and 64 kBit for mono files.&nbsp;
<p>Allowed bitrates are: 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192,
224, 256 and 320.</td>
</tr>

<tr>
<td VALIGN=TOP>-crc</td>

<td>Adds checksum data to each frame in the MP3 file. The checksum data
is needed for error-correction when streaming the MP3 in realtime over
internet (as done by internet radiostations). It lowers the quality of
the sound slightly since the checksum data also needs to fit in the specified
bitrate and is not needed for normal use.</td>
</tr>

<tr>
<td VALIGN=TOP>-delete,
<br>-del</td>

<td>The WAV-file is automatically deleted after having been encoded. Be
careful with this switch because the WAV-file is deleted even if the encoding
process failed (for example due to insufficient drivespace).</td>
</tr>

<tr>
<td VALIGN=TOP>-mono,
<br>-dm</td>

<td>Downmixes stereo input files to mono before they are compressed, thus
generating mono MP3 files. This switch does nothing if the input file allready
is mono.</td>
</tr>

<tr>
<td>-leftmono,
<br>-lm</td>

<td>Takes only the left channel of the input file and encodes it into a
mono MP3. If the input file is mono it will be compressed as it is.</td>
</tr>

<tr>
<td>-rightmono,
<br>-rm</td>

<td>Takes only the right channel of the input file and encodes it into
a mono MP3. If the input file is mono it will be compressed as it is.</td>
</tr>

<tr>
<td>-swap</td>

<td>Swaps the left and right channels of stereo input files before encoding
them.&nbsp;</td>
</tr>

<tr>
<td VALIGN=TOP>-private,
<br>-p</td>

<td>Sets the private-flag in the MP3-file, specifying that this is a private
MP3. As far as I know there is no program that treats private MP3's differently
from normal ones so it is practically useless.&nbsp;
<p>Setting this flag doesn't affect the encoding time, filesize or quality
in any way, so set it if it makes you happy.</td>
</tr>

<tr>
<td VALIGN=TOP>-copyright,
<br>-c</td>

<td>Sets the copyright-flag in the MP3-file, specifying that this is a
copyrighted MP3. As far as I know there is no program that treats copyrighted
MP3's differently from normal ones so it is practically useless.&nbsp;
<p>Setting this flag doesn't affect the encoding time, filesize or quality
in any way, so set it if it makes you happy.</td>
</tr>

<tr>
<td>-copy</td>

<td>This switch clears the MP3 file's original-flag that is set by default
from version 0.50 of BladeEnc.&nbsp;
<p>Clearing the original-flag doesn't affect the encoding time, filesize
or quality in any way, so do it if it makes you happy.</td>
</tr>

<tr>
<td>-quiet</td>

<td>Prevents BladeEnc from doing any screen output, except for error messages.
This is mostly usefull if you want to run bladeenc as a background process
on UNIX systems. The screen output takes nearly no time at all, so you
won't even save 1% by disabling screen output.<b> This switch is global
only.</b></td>
</tr>

<tr>
<td>-quit,
<br>-q</td>

<td>Makes BladeEnc quit automatically when all files have been encoded.
Normally BladeEnc waits for someone to press RETURN before quitting. <b>This
switch is global only.</b></td>
</tr>

<tr>
<td>-outdir=[path]</td>

<td>Specifies an output path for the encoded files. Normally the MP3 files
ends up in the same directory as their corresonding WAV-files resides in,
but using this switch you can get them to end up wherever you like. <b>This
switch is global only.</b></td>
</tr>

<tr>
<td>-prio=[setting]</td>

<td>Changes the task priority of BladeEnc. Valid settings are HIGHEST,
HIGHER, NORMAL, LOWER, LOWEST and IDLE. BladeEnc is by default set to LOWEST
priority which basically means that BladeEnc functions fine in the background
without disturbing or slowing down any other program. <b>This switch is
global only.</b>
<br><i>This setting is not available in all ports.</i></td>
</tr>
</table>

<p><font size=+2>L3Enc Emulation Mode</font>
<p>The l3enc emulation mode of older versions of BladeEnc has been removed
in BladeEnc 0.80 since the new way of reading the commandline in this version
makes it understand l3enc commandlines anyway.
<p>Just remember that the default bitrate of BladeEnc is 128 kBit, while
l3enc uses 112 kBit.
<p>However, two small tricks were necessary to make BladeEnc compatible
with l3enc:
<ol>
<li>
If the specified bitrate is over 1000 it is divided by 1000 in order to
convert it from bits/sec to kBit/sec.</li>

<li>
If l3enc's -hq switch is placed on the commandline or a bitrate over 1000
is specified locally using the -br switch, BladeEnc automatically activates
the -quit switch.</li>
</ol>

<p><br><font size=+2>Updates, Questions and Information</font>
<p>The latest version of BladeEnc is available at my homepage together
with an FAQ and some other information. See the top of this document for
the URL and my E-mail address.
<br>&nbsp;
<p><font size=+2>Copyright and Distribution</font>
<p>BladeEnc is copyright Tord Jansson.
<p>BladeEnc is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.
<p>You should have received a copy of the GNU Lesser General Public License
with BladeEnc. If not, please see BladeEnc's homepage or www.fsf.org for
more details.
<br>&nbsp;
<p><font size=+2>Credits</font>
<p>BladeEnc includes code from distribution 10 of ISO's reference code.
The contributors to that reference code have been:
<p>Bill Aspromonte,&nbsp; Shaun Astarabadi,&nbsp; R. Bittner,&nbsp; Karlheinz
Brandenburg,&nbsp; W. Joseph Carter,&nbsp; Jack Chang,&nbsp; Mike Coleman,&nbsp;
Johnathan Devine,&nbsp; Ernst Eberlein,&nbsp; Dan Ellis,&nbsp; Peter Farrett,&nbsp;
Jean-Georges Fritsch,&nbsp; Vlad Fruchter,&nbsp; Hendrik Fuchs,&nbsp; Bernhard
Grill, Amit Gulati,&nbsp; Munsi Haque,&nbsp; Chuck Hsiao,&nbsp; Toshiyuki
Ishino,&nbsp; Masahiro Iwadare,&nbsp; Earl Jennings,&nbsp; James Johnston,&nbsp;
Leon v.d. Kerkhof,&nbsp; Don Lee,&nbsp; Mike Li,&nbsp; Yu-Tang Lin,&nbsp;
Soren Neilsen,&nbsp; Simao F. Campos Neto,&nbsp; Mark Paley,&nbsp; Davis
Pan,&nbsp; Tan Ah Peng,&nbsp; Kevin Peterson,&nbsp; Juan Pineda,&nbsp;
Ernst F. Schroeder,&nbsp; Peter Siebert,&nbsp; Jens Spille,&nbsp; Sam Stewart,&nbsp;
Al Tabayoyon,&nbsp; Kathy Wang,&nbsp; Franz-Otto Witte,&nbsp; Douglas Wong.
<p>All modifications of the reference code in order to create all versions
of BladeEnc up to 0.80 have been made by Tord Jansson.
<br>&nbsp;
<p>Thanks to the following people for contributing code and bugfixes to
BladeEnc:
<p>Mikael Kjellstr&ouml;m, Kevin Doherty, Milan Hodoscek, Wesley Hosking,
Jon Watte, Dmitri Kalintsev, William Thompson, Olaf Pueschel, Marc Schefer,
Lennart B&ouml;rjeson, John DuBois.
<br>&nbsp;
<p>Thanks to the following people for providing binaries of BladeEnc for
various formats:
<p>Trevor Phillips, Zac Livingston, Jon Coyle, Alexey Marinichev, Mikael
Kjellstr&ouml;m, Steve Burns, Markus Ridinger, Giao Nguyen, Joel Fredrikson,
Marca Registrada, Rob Braun.
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