diff --git a/.zprezto/runcoms/zalias b/.zprezto/runcoms/zalias
index 60f774d..27d8b9e 100644
--- a/.zprezto/runcoms/zalias
+++ b/.zprezto/runcoms/zalias
@@ -178,6 +178,11 @@ function testo2() {
 
 function ffmpeg_timelapse() {
   local DATE=$1
+  local PRESET=$2
+
+  if [[ -z $PRESET ]]; then
+    local PRESET="ultrafast"
+  fi
 
   ls /mnt/a/snaps/$DATE | wc -l || return