Enable enhanced Nvdec by default for using DoVi tone-mapping

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

MediaBrowser.Model/Configuration/EncodingOptions.cs

@@ -34,7 +34,8 @@ namespace MediaBrowser.Model.Configuration
             DeinterlaceMethod = "yadif";
             EnableDecodingColorDepth10Hevc = true;
             EnableDecodingColorDepth10Vp9 = true;
-            EnableEnhancedNvdecDecoder = false;
+            // Enhanced Nvdec or system native decoder is required for DoVi to SDR tone-mapping.
+            EnableEnhancedNvdecDecoder = true;
             PreferSystemNativeHwDecoder = true;
             EnableIntelLowPowerH264HwEncoder = false;
             EnableIntelLowPowerHevcHwEncoder = false;