diff --git a/bash/make_pr4444.sh b/bash/make_pr4444.sh
index c3a9ebf..425fdea 100755
--- a/bash/make_pr4444.sh
+++ b/bash/make_pr4444.sh
@@ -1,3 +1,40 @@
+while getopts "n:r:" opt; do
+  case ${opt} in
+    n )
+      start_number=$OPTARG
+      ;;
+	r )
+      frame_rate=$OPTARG
+      ;;
+    \? )
+      echo "Invalid option: $OPTARG" 1>&2
+      ;;
+    : )
+      echo "Invalid option: $OPTARG requires an argument" 1>&2
+      ;;
+  esac
+done
+
+if [ -z "$start_number" ]
+then
+	n=;
+else
+	n='-start_number '$start_number;
+fi
+
+if [ -z "$frame_rate" ]
+then
+	r=;
+else
+	r='-r '$frame_rate;
+fi
+
+shift "$(($OPTIND -1))"
+
+
+
 for i;
-	do ffmpeg -i "$i" -f mov -c:v prores_ks -profile:v 4444 -pix_fmt yuva444p10le -strict -2 -vendor ap10 "${i%.*}_pr4444.mov" ;
+	do 
+	output=$(echo $i | sed 's/_%0[[:digit:]]d//');
+	ffmpeg $n $r -i "$i" -f mov -c:v prores_ks -profile:v 4444 -pix_fmt yuva444p10le -strict -2 -vendor ap10 "${output%.*}_pr4444.mov" ;
 done;