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<HTML>
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<P><B><A NAME=2.4>2.4. Encoding with MEncoder</A></B></P>
<P><B><I>Overview</I></B>
<P><B>MEncoder</B> (<B>MPlayer</B>'s Movie Encoder) is a simple movie encoder,
designed to encode MPlayer-playable movies
(<B>AVI/DVD/VCD/VOB/MPG/MOV/VIV/NET</B>) to other MPlayer-playable formats (see
below). Currently it's in beta stage, and encodes only to <B>DivX4</B> (1 or 2
passes) video, <B>PCM</B>/<B>MP3</B>/<B>VBRMP3</B> audio. Also has stream
copying abilities. In the future, there will be cropping, resizing filters, and
other interesting stuff.</P>
<P><B><I>Compiling</I></B>
<UL>
<LI>read <B>MPlayer</B>'s compilation instructions, it contains info about
how to install <I>libdvdread</I> for <B>DVD</B> support, etc.</LI>
<LI>download the newest <B>DivX4linux</B> libs
from <A HREF="http://avifile.sourceforge.net/download.htm">avifile.sourceforge.net</A>,
and have them PROPERLY installed. This is needed for DivX4 (1/2 pass)
encoding.</LI>
<LI>download and install <B>libmp3lame</B> (from lame 3.89beta or lame CVS). This
is needed for CBR/VBR MP3 audio encoding ability. Note that a single
<CODE>lame</CODE> binary isn't sufficient. BTW: the less optimization
you use for lame, the better the quality will be. You can test
quality by running <CODE>make test</CODE> after lame's compiling process
is over. The resulting number should be less than <B>30</B>. Don't
panic if it's <B>400</B> or so, you shouldn't heard any audible
quality decrease. Oh, and if your compiler doesn't even run <CODE>make test</CODE> ...
Well, delete that <B>GCC 2.96</B>.</LI>
<LI>use <CODE>./configure</CODE> with optional parameters as usual
(use <CODE>--enable-tv</CODE> to include V4L tuner grabbing code), and
type : <CODE>make mencoder</CODE> , then <CODE>make install</CODE> .
</UL>
</P>
<P>You are ready. As you probably know, other encoding tools need the
<I>avifile</I> library installed. <B>MEncoder</B> doesn't need it at all.</P>
<P><B><I>MEncoder features</I></B> :
<UL>
<LI>encoding from the wide range of fileformats and decoders of <B>MPlayer</B></LI>
<LI>encoding from <B>V4L compatible TV tuners</B></LI>
<LI>encoding/multiplexing to interleaved AVI files with proper index</LI>
<LI>1 or 2 pass <B>DivX4</B> video</LI>
<LI><B>VBR</B> MP3 audio</LI>
<LI>PCM audio</LI>
<LI>stream copying (only from AVI/ASF now, and CBR audio only)</LI>
<LI>input A/V synchronizing (PTS-based, can be disabled with -mc 0 option)</LI>
<LI>FPS correction with <CODE>-ofps</CODE> option (useful when encoding
29.97fps VOB to 24fps AVI)</LI>
</UL>
</P>
<P><B><I>Planned features</I></B> :
<UL>
<LI>using audio from separate file (AC3, MP3, OGG)</LI>
<LI>VBR audio stream copy</LI>
<LI>even wider variety of available en/decoding formats/codecs
(creating VOB files with DivX4/Indeo5/VIVO streams :)</LI>
</UL>
</P>
<P><B><I>Encoding 2-pass DivX4</I></B></P>
<P>The name comes from the fact that this method encodes the file <I>twice</I>.
The first encoding (dubbed <I>pass</I>) creates a temporary file with a size
of few megabytes. In the second pass, the output file is created, using the
bitrate data from the temporary file. The resulting file will have much
better image quality. If this is the first time you heard about this, you
should consult some guides available on the Net.</P>
<P>This example shows how to encode a DVD to a 2-pass DivX4 AVI. Just two
commands are needed :<BR>
<CODE> mencoder -dvd 2 -ovc divx4 -oac mp3lame -divx4opts br=1100
-o movie.avi -pass 1<BR>
mencoder -dvd 2 -ovc divx4 -oac mp3lame -divx4opts br=1100 -o movie.avi -pass 2</CODE></P>
<P><B><I>Syntax</I></B></P>
<P> <CODE>mencoder [options] <input file> [options] ...</P>
<P><B><I>Available options</I></B></P>
<P>NOTE : for all available options, <B>read the manpage !</B></P>
<TABLE BORDER=0>
<TR>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
<I>-o</I> filename</TD>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
specify output filename
</TD>
</TR>
<TR>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
<I>-ovc</I> codecname</TD>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
Encode with the given codec (codec names are from codecs.conf). Examples:<BR>
<B>help</B> - get list of available codecs<BR>
<B>copy</B> - no encoding, just copy the stream (only from AVI/ASF now)<BR>
<B>divx4</B> - encode to DivX4<BR>
</TD>
</TR>
<TR>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
<I>-oac</I> codecname</TD>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
Encode with the given codec (codec names are from codecs.conf). Examples:<BR>
<B>help</B> - get list of available codecs<BR>
<B>copy</B> - no encoding, just copy the stream (only from AVI/ASF now)<BR>
<B>pcm</B> - encode to uncompressed PCM<BR>
<B>mp3lame</B> - encode to MP3 (using Lame)<BR>
</TD>
</TR>
<TR>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
<I>-divx4opts</I></TD>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
If encoding to DivX4, you can specify its parameters here, like:<BR>
<CODE>-divx4opts br=1800:deinterlace:key=250</CODE><BR>
Common options: <B>(for full list, check the manpage!)</B><BR>
<B>help</B> - get help<BR>
<B>br</B>=XXX - specify bitrate in kbit <4-16000> or bit <16001-24000000><BR>
<B>q</B>=XXXX - quality (1-fastest, 5-best - default 5)<BR>
</TD>
</TR>
<TR>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
<I>-lameopts</I></TD>
<TD> </TD>
<TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
If encoding to MP3 with libmp3lame, you can specify its parameters here, like:<BR>
<CODE>-lameopts q=3</CODE><BR>
<CODE>-lameopts br=192:cbr</CODE><BR>
Common options: <B>(for full list, check the manpage!)</B><BR>
<B>help</B> - get help<BR>
<B>cbr</B> - select <B>CBR</B> MP3 (default is <B>VBR</B>)<BR>
<B>br</B>=XXX - specify bitrate in kbit <0-1024> (this is for <B>CBR</B> only!)<BR>
<B>q</B>=XXXX - quality (0-highest, 9-fastest - default 0) (this is for <B>VBR</B> only!)<BR>
</TD>
</TR>
</TABLE>
<P><B><I>Examples</I></B></P>
<P>Using <B>MEncoder</B> is the easiest thing on Earth. See the following :</P>
<P>Encoding from DVD, title 2 :<BR>
<CODE> mencoder -dvd 2 -o title2.avi</CODE></P>
<P>Encoding from HTTP :<BR>
<CODE> mencoder http://mplayer.hq/example.avi -o example.avi</CODE></P>
<P>Encoding from a pipe :<BR>
<CODE> rar p test-SVCD.rar | mencoder -divx4opts br=800 -ofps 24 -pass 1 -- -</CODE></P>
<P>Encoding multiple *.vob files :<BR>
<CODE> cat *.vob | mencoder <options> -</CODE></P>
<P>Encoding from tuner (for tuner options <A HREF="documentation.html#2.5">see the TV input section !</A>) :<BR>
<CODE> mencoder -tv on:driver=v4l:width=640:height=480 <options> -</CODE></P>
<P>For all available options, <B><I>check the MEncoder man page !</I></B>
<P>
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