diff --git a/TOOLS/aconvert b/TOOLS/aconvert
index 70591d4887..bbaef5523e 100755
--- a/TOOLS/aconvert
+++ b/TOOLS/aconvert
@@ -14,4 +14,4 @@ else
     options=$3
 fi
  
-mencoder -rawvideo on:w=1:h=1 -ovc copy -of rawaudio -endpos `mplayer -identify $1 -frames 0 2>&1 | grep ID_LENGTH | cut -d "=" -f 2` -audiofile $1 -o $2 $options $1
+mencoder -demuxer rawvideo -rawvideo w=1:h=1 -ovc copy -of rawaudio -endpos `mplayer -identify $1 -frames 0 2>&1 | grep ID_LENGTH | cut -d "=" -f 2` -audiofile $1 -o $2 $options $1