diff --git a/Fraktalism/encode.sh b/Fraktalism/encode.sh
index 620d285..6f1233d 100755
--- a/Fraktalism/encode.sh
+++ b/Fraktalism/encode.sh
@@ -1,15 +1,25 @@
 #!/bin/bash
 
-DDIR="frames/pick3d"
+if [ $# -ne 2 ] ; then
+	echo
+	echo "need two arguments:"
+	echo "    source dir"
+	echo "    mp4 filename"
+	exit 1
+fi
 
-echo "Encoding from " $DDIR
+SDIR="$1"
+FNAME="$2"
+echo "Encoding from " $SDIR " to " $FNAME
+
+TITLE='---{ experimental }---'
 
 ffmpeg  -nostdin					\
-        -loglevel warning				\
-        -y -r 25 -f image2 -i $DDIR/%05d.png 		\
-	-metadata artist='---[ tTh ]---'		\
-	-metadata title='---[ experiment ]---'		\
-        -c:v libx264 -pix_fmt yuv420p			\
-        clifford-evolv-0.mp4
+	-loglevel warning				\
+	-y -r 25 -f image2 -i $SDIR/%05d.png 		\
+	-metadata artist='---{ tTh }---'		\
+	-metadata title="${TITLE}"			\
+	-c:v libx264 -pix_fmt yuv420p			\
+	$FNAME