diff --git a/pack-set b/pack-set
index 6bb3c85..0491e22 100755
--- a/pack-set
+++ b/pack-set
@@ -1,7 +1,7 @@
 #!/bin/sh
 INFILE="$1"
 shift
-COMMON="--quality=0.67 --exposure=-3 --peak=125 --crop"
+COMMON="--quality=0.67 --exposure=-3 --peak=100 --preset=slow"
 pack-vid $COMMON --size=4m  "$INFILE" "${INFILE%.mp4}-small.mp4" &
 pack-vid $COMMON --size=25m "$INFILE" "${INFILE%.mp4}-large.mp4" &
 wait
diff --git a/pack-vid b/pack-vid
index cd345ce..b2ed547 100755
--- a/pack-vid
+++ b/pack-vid
@@ -20,6 +20,7 @@ $options = [
     'no-audio' => false,
     'exposure' => '0', // stops
     'peak' => '1000', // '10000' is max
+    'preset' => 'slow',
     'fps' => '60000/1001',
     'size' => $maxBytes,
     'quality' => 1.0,
@@ -44,6 +45,7 @@ if ( count ( $args ) < 2 ) {
         "  --no-audio     strip audio\n" .
         "  --exposure=n   adjust exposure\n" .
         "  --peak=n       set HDR peak nits\n" .
+        "  --preset=key   set h.264 encoding preset\n" .
         "  --fps=n        frame rate limit\n" .
         "  --size=n       target file size in bytes (default 3.5M)\n" .
         "  --quality=n    fraction of base bitrate to break on (deafult 0.75)\n"
@@ -220,9 +222,7 @@ function convert( $src, $dest, $options ) {
 
     $fps = $options['fps'];
 
-    // $preset = 'veryslow'; // annoying at higher resolutions
-    $preset = 'slow';
-    //$preset = 'fast';
+    $preset = $options['preset'];
 
     $tempPrefix = 'pack-vid-passlog' . rand(0,1 << 31);
     $passlog = tempnam( '.', $tempPrefix );