diff --git a/tools/mkloop.sh b/tools/mkloop.sh
index 5d95f1b..024c16d 100755
--- a/tools/mkloop.sh
+++ b/tools/mkloop.sh
@@ -17,7 +17,7 @@ echo "$0 $SEQNAME from $START" >> WS/log
 
 DIMS="-W$Img_Width -H$Img_Height"
 NBFR=" Declare=NbFrames=$NBFRAMES "
-POVOPT="+q9 +A0.02 -d ${DIMS} ${NBFR} -WT5"
+POVOPT="+q9 +A0.02 -d ${DIMS} ${NBFR} -WT4"
 echo $NBFR "frames."
 echo $POVOPT ; echo ; sleep 2
 
@@ -53,7 +53,7 @@ do
 		-annotate +0+5 "$txt"			\
 		${img}
 	fin=$(date +%s)
-	echo
+	echo ; sleep 1
 	printf "%-12s %5d %5d\n" 	\
 		${SEQNAME} $frame $(( fin-debut )) | \
 				tee -a WS/mp4.timing