Fix #9642 backport

Signed-off-by: nyanmisaka <nst799610810@gmail.com>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -2966,7 +2966,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (string.Equals(hwTonemapSuffix, "vaapi", StringComparison.OrdinalIgnoreCase))
             {
-                args = "procamp_vaapi=b={2}:c={3}," + args + ":extra_hw_frames=32";
+                args = "procamp_vaapi=b={1}:c={2},tonemap_vaapi=format={0}:p=bt709:t=bt709:m=bt709:extra_hw_frames=32";
 
                 return string.Format(
                         CultureInfo.InvariantCulture,