--- /dev/null
+#! /bin/sh
+
+
+if [ -z "$1" ]; then
+ echo "Usage: $0 input.avi"
+ exit 1
+fi
+
+
+# mencoder only copies ONE audiostream from the input;
+# I don't know how to overcome this.
+
+mencoder -idx "$1" -ovc copy -oac copy -o output.avi &&
+exec mv output.avi "$1"