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>