[Mplayer-cvslog] CVS: main/DOCS documentation.html,1.183,1.184 encoding.html,1.23,1.24
Winner of tha face compo
gabucino at mplayer.dev.hu
Mon Jan 28 15:01:32 CET 2002
Update of /cvsroot/mplayer/main/DOCS
In directory mplayer:/var/tmp.root/cvs-serv30187
Modified Files:
documentation.html encoding.html
Log Message:
3-pass encoding dox
Index: documentation.html
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/documentation.html,v
retrieving revision 1.183
retrieving revision 1.184
diff -u -r1.183 -r1.184
--- documentation.html 26 Jan 2002 16:49:58 -0000 1.183
+++ documentation.html 28 Jan 2002 14:01:21 -0000 1.184
@@ -140,7 +140,7 @@
<LI><A HREF="encoding.html#2.4.3">2.4.3 Features</A></LI>
<UL>
<LI><A HREF="encoding.html#2.4.3">2.4.3 Summary</A></LI>
- <LI><A HREF="encoding.html#2.4.3.1">2.4.3.1 Encoding 2-pass DivX4</A></LI>
+ <LI><A HREF="encoding.html#2.4.3.1">2.4.3.1 Encoding 2 or 3-pass DivX4</A></LI>
<LI><A HREF="encoding.html#2.4.3.2">2.4.3.2 Rescaling movies</A></LI>
<LI><A HREF="encoding.html#2.4.3.3">2.4.3.3 Streamcopy</A></LI>
<LI><A HREF="encoding.html#2.4.3.4">2.4.3.4 Fixing AVIs with broken index</A></LI>
Index: encoding.html
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/encoding.html,v
retrieving revision 1.23
retrieving revision 1.24
diff -u -r1.23 -r1.24
--- encoding.html 15 Jan 2002 17:04:00 -0000 1.23
+++ encoding.html 28 Jan 2002 14:01:21 -0000 1.24
@@ -9,11 +9,10 @@
<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/FLI/RM/NUV/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>
+(<B>AVI/DVD/VCD/VOB/MPG/MOV/VIV/FLI/RM/NUV/NET</B>) to other MPlayer-playable
+formats (see below). It can encode with various codecs, like <B>DivX4</B> (1 or
+2 passes), libavcodec, <B>PCM</B>/<B>MP3</B>/<B>VBRMP3</B> audio. Also has
+stream copying and video resizing abilities.</P>
<P><B><A NAME=2.4.2>2.4.2. Compiling</B></P>
@@ -54,7 +53,7 @@
<A HREF=codecs.html#2.2.1.2>libavcodec</A></LI>
<LI>video 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>1, 2 or 3 pass <B>DivX4</B> video</LI>
<LI><B>VBR</B> MP3 audio - <B>IMPORTANT NOTE</B> : VBR MP3 audio doesn't
always play nicely on windows players! If you intend to encode AVIs
mainly for windows, encode with CBR!</LI>
@@ -77,9 +76,9 @@
</UL>
</P>
-<P><B><A NAME=2.4.3.1>2.4.3.1. Encoding 2-pass DivX4</B></P>
+<P><B><A NAME=2.4.3.1>2.4.3.1. Encoding 2 or 3-pass DivX4</B></P>
-<P>The name comes from the fact that this method encodes the file <I>twice</I>.
+<P><U><B>2-pass encoding :</B></U> the name comes from the fact that this method encodes the file <I>twice</I>.
The first encoding (dubbed <I>pass</I>) creates some temporary files (*.log) with a
size of few megabytes, do not delete them yet (you can delete the AVI). In the second pass, the
2-pass output file is created, using the bitrate data from the temporary files. The resulting
@@ -88,9 +87,71 @@
<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
+<CODE> rm frameno.avi</CODE> - remove this file, which
+ can come from a previous 3-pass encoding (it interferes with current one)<BR>
+<CODE> mencoder -dvd 2 -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>
+ mencoder -dvd 2 -divx4opts br=1100 -o movie.avi -pass 2</CODE></P>
+
+<P><U><B>3-pass encoding :</B></U> this is an extension of 2-pass encoding,
+ where the audio encoding takes place in a separate pass. This method enables
+ estimation of recommended video bitrate in order to fit on a CD. Also, the
+ audio is encoded only once, unlike in 2-pass mode. The schematics :</P>
+
+<P>
+ <TABLE>
+ <TR>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <CODE>rm frameno.avi</CODE></TD>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <B>remove conflicting temporary file</B></TD>
+ </TR>
+ <TR>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <CODE>mencoder <file/DVD> -ovc frameno -o
+ frameno.avi</CODE></TD>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <B><U>First pass</U> : an audio-only avi file will be created, containing
+ ONLY the requested audio stream. Don't forget <CODE>-lameopts</CODE>, if
+ you need to set it. If you were encoding a long movie, MEncoder prints
+ the recommended bitrate values for 650Mb, 700Mb, and 800Mb destination
+ sizes, after this pass finishes.</B></TD>
+ </TR>
+ <TR>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <CODE>mencoder <file/DVD> -oac copy -pass 1
+ -divx4opts br=<bitrate></CODE></TD>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <B><U>Second pass</U> : alias the first pass of DivX4 video encoding.
+ Optionally specify the video bitrate MEncoder printed at the end of the
+ previous pass.</B></TD>
+ </TR>
+ <TR>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <CODE>mencoder <file/DVD> -oac copy -pass 2
+ -divx4opts br=<bitrate></CODE></TD>
+ <TD><FONT face="Verdana, Arial, Helvetica, sans-serif" size=2>
+ <B><U>Third pass</U> : alias the second pass of DivX4 video encoding.
+ Optionally specify the video bitrate MEncoder printed at the end of the
+ previous pass. In this pass, audio from <CODE>frameno.avi</CODE> will be
+ inserted into the destination file.. and it's all ready!</B></TD>
+ </TR>
+ </TABLE>
+</P>
+
+<P><B>Example for 3-pass encoding :</B></P>
+
+<P><CODE> rm frameno.avi</CODE> - remove this file,
+ which can come from a previous 3-pass encoding (it interferes with current
+ one)<BR>
+<CODE> mencoder -dvd 2 -ovc frameno
+ -o frameno.avi<BR>
+<CODE> mencoder -dvd 2
+ -divx4opts br=1100 -oac copy -o movie.avi -pass 1<BR>
+ mencoder -dvd 2
+ -divx4opts br=1100 -oac copy -o movie.avi -pass 2</CODE>
+</P>
+
<P><B><A NAME=2.4.3.2>2.4.3.2. Rescaling movies</B></P>
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