Add back code removed during testing/debugging

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -2203,6 +2203,8 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             if (!string.IsNullOrEmpty(videoDecoder))
             {
+                inputModifier += " " + videoDecoder;
+
                 if ((videoDecoder ?? string.Empty).IndexOf("_cuvid", StringComparison.OrdinalIgnoreCase) != -1)
                 {
                     var videoStream = state.VideoStream;