diff --git a/pack-vid b/pack-vid
index b703222..fb01a40 100755
--- a/pack-vid
+++ b/pack-vid
@@ -198,12 +198,12 @@ function convert( $src, $dest, $options ) {
 
     $filters = [ "scale=w=$scaleWidth:h=$scaleHeight" ];
     if ( $hdr ) {
-        $filters[] = "zscale=t=linear:p=bt709";
+        $filters[] = "zscale=t=linear:p=bt2020";
         if ( $exposure ) {
             $filters[] = "exposure=$exposure";
         }
         $filters[] = "tonemap=hable:peak=$peak";
-        $filters[] = "zscale=t=bt709:m=bt709:r=full";
+        $filters[] = "zscale=t=bt709:p=bt709:m=bt709:r=full";
     }
     $filters[] = "format=yuv420p";
     if ( $crop ) {