Index: mencoder.xml
===================================================================
RCS file: /cvsroot/mplayer/main/DOCS/xml/en/mencoder.xml,v
retrieving revision 1.87
diff -u -r1.87 mencoder.xml
--- mencoder.xml	31 Jul 2005 21:44:57 -0000	1.87
+++ mencoder.xml	15 Aug 2005 15:46:29 -0000
@@ -131,6 +131,22 @@
   for this.
   </para></listitem>
 </itemizedlist>
+
+<para>
+  Using <option>-oac copy</option> to copy audio from one format
+  to another may require the use of <option>-fafmttag</option>.
+  For example, if you are converting an nsv file with aac audio to an avi
+  container, the audio format tag will be incorrect and it will have to
+  be changed. For a list of audio format tags, check <filename>codecs.conf</filename>.
+</para>
+
+<para>
+Example:
+<screen>
+mencoder <replaceable>input.nsv</replaceable> -oac copy -fafmttag 0x706D -ovc lavc -lavcopts vcodec=mpeg4 -o <replaceable>output.avi</replaceable>
+</screen>
+</para>
+
 </sect1>