[MPlayer-DOCS] CVS: main/DOCS/xml/en encoding-guide.xml,1.38,1.39

[Guillaume Poirier CVS]

CVS change done by Guillaume Poirier CVS

Update of /cvsroot/mplayer/main/DOCS/xml/en
In directory mail:/var2/tmp/cvs-serv9466/en

Modified Files:
	encoding-guide.xml 
Log Message:
MEncoder's MPEG muxer needs -vf harddup to function properly, no add a note about this.


Index: encoding-guide.xml
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/xml/en/encoding-guide.xml,v
retrieving revision 1.38
retrieving revision 1.39
diff -u -r1.38 -r1.39
--- encoding-guide.xml	27 Dec 2005 13:01:22 -0000	1.38
+++ encoding-guide.xml	16 Jan 2006 20:49:07 -0000	1.39
@@ -4214,6 +4214,23 @@
 
 </sect3>
 
+<sect3 id="menc-feat-vcd-dvd-a-v-sync">
+<title>Maintaining A/V sync</title>
+<para>
+  In order to maintain audio/video synchronization throughout the encode,
+  <application>MEncoder</application> has to drop or duplicate frames.
+  This works rather well when muxing into an AVI file, but is almost
+  guaranteed to fail to maintain A/V sync with other muxers such as MPEG.
+  This is why it is necessary to append the
+  <option>harddup</option> video filter at the end of the filter chain
+  to avoid this kind of problem.
+  You can find more technical information about <option>harddup</option>
+  in the section
+  <link linkend="menc-feat-dvd-mpeg4-muxing-filter-issues">Improving muxing and A/V sync reliability</link>
+  or in the manual page.
+</para>
+</sect3>
+
 <sect3 id="menc-feat-vcd-dvd-output-srate">
 <title>Sample Rate Conversion</title>
 <para>