diff --git a/pack-vid b/pack-vid
index 7b3c660..6161ad3 100755
--- a/pack-vid
+++ b/pack-vid
@@ -8,6 +8,7 @@
 // Picks bitrate to match
 // Picks resolution based on bitrate target
 // 2-pass encoding with libx264 veryslow
+// fps limiter: warning requires newer ffmpeg than debian-buster
 
 $args = $_SERVER['argv'];
 $self = array_shift( $args );
@@ -233,8 +234,8 @@ function convert( $src, $dest, $options ) {
         array_merge( [
             '-i', $src,
             '-f', 'mp4',
-            //'-fpsmax', $fps,
-            '-r', $fps,
+            '-fpsmax', $fps,
+            //'-r', $fps,
             '-vf', $vf,
             '-c:v', 'libx264',
             '-b:v', $bitrate,
@@ -250,8 +251,8 @@ function convert( $src, $dest, $options ) {
         array_merge( [
             '-i', $src,
             '-vf', $vf,
-            //'-fpsmax', $fps,
-            '-r', $fps,
+            '-fpsmax', $fps,
+            //'-r', $fps,
             '-c:v', 'libx264',
             '-b:v', $bitrate,
             '-preset', $preset,