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-rw-r--r--DOCS/xml/en/mencoder.xml18
1 files changed, 18 insertions, 0 deletions
diff --git a/DOCS/xml/en/mencoder.xml b/DOCS/xml/en/mencoder.xml
index 26531fd2a0..be9b857e70 100644
--- a/DOCS/xml/en/mencoder.xml
+++ b/DOCS/xml/en/mencoder.xml
@@ -131,6 +131,24 @@ them. This section is about <emphasis role="bold">copying</emphasis>.
for this.
</para></listitem>
</itemizedlist>
+
+<para>
+ Using <option>-oac copy</option> to copy from one container format to
+ another may require the use of <option>-fafmttag</option> to keep the
+ audio format tag of the original file.
+ 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>