Backport pull request #8174 from jellyfin/release-10.8.z

Disable auto inserted SW scaler for HW decoders

Authored-by: nyanmisaka <nst799610810@gmail.com>

Merged-by: Bond-009 <bond.009@outlook.com>

Original-merge: 7297431f23

Jellyfin.Api/Controllers/DynamicHlsController.cs

@@ -1790,7 +1790,8 @@ namespace Jellyfin.Api.Controllers
                 || string.Equals(codec, "hevc", StringComparison.OrdinalIgnoreCase))
             {
                 if (EncodingHelper.IsCopyCodec(codec)
-                    && (string.Equals(state.VideoStream.CodecTag, "dovi", StringComparison.OrdinalIgnoreCase)
+                    && (string.Equals(state.VideoStream.VideoRangeType, "DOVI", StringComparison.OrdinalIgnoreCase)
+                        || string.Equals(state.VideoStream.CodecTag, "dovi", StringComparison.OrdinalIgnoreCase)
                         || string.Equals(state.VideoStream.CodecTag, "dvh1", StringComparison.OrdinalIgnoreCase)
                         || string.Equals(state.VideoStream.CodecTag, "dvhe", StringComparison.OrdinalIgnoreCase)))
                 {

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -931,6 +931,13 @@ namespace MediaBrowser.Controller.MediaEncoding
                 arg.Append(" -i \"").Append(state.AudioStream.Path).Append('"');
             }
 
+            // Disable auto inserted SW scaler for HW decoders in case of changed resolution.
+            var isSwDecoder = string.IsNullOrEmpty(GetHardwareVideoDecoder(state, options));
+            if (!isSwDecoder)
+            {
+                arg.Append(" -autoscale 0");
+            }
+
             return arg.ToString();
         }