diff --git a/normalize-video b/normalize-video
index 37335d1..09828bb 100755
--- a/normalize-video
+++ b/normalize-video
@@ -193,7 +193,7 @@ function move_to_backup {
   if [ ! -d "${base}" ]; then
     continue
   fi
-  base=/multimedia/backup"${base}"
+  base=${BACKUP:-/multimedia/backup}"${base}"
   if [ ! -d "${base}" ]; then
     mkdir -p "${base}" || fail "Unable to mkdir '${base}'"
   fi
@@ -274,7 +274,7 @@ function check_and_convert {
   fi
 
   echo -n "${PREFIX} Counting frames in ${IN}: "
-  FRAMES=$(ffprobe -v error -select_streams v:0 -count_packets -show_entries stream=nb_read_packets -of csv=p=0 "${IN}") || fail "Unable to count frames"
+  FRAMES=$(ffprobe -v error -select_streams v:0 -show_entries stream -of default=noprint_wrappers=1 "${IN}" | sed -ne 's,^TAG:NUMBER_OF_FRAMES=,,p') || fail "Unable to count frames"
   echo -e "\n${PREFIX} ${FRAMES} frames."
 
   IN="$(realpath "${IN}")"
@@ -343,6 +343,11 @@ function check_and_convert {
       false
       break
     fi
+    if [[ "${FRAMES}" == "" ]]; then
+      echo ${line}
+      continue;
+    fi
+
     POS=$(echo $line | sed -n 's/^frame=*\(.*\)/\1/p')
     if [[ "${POS}" == "" ]]; then
       true