enable new character set detector

MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs

@@ -700,17 +700,17 @@ namespace MediaBrowser.MediaEncoding.Subtitles
         /// <returns>System.String.</returns>
         public string GetSubtitleFileCharacterSet(string path, string language)
         {
-            //var charset = DetectCharset(path);
+            var charset = DetectCharset(path);
 
-            //if (!string.IsNullOrWhiteSpace(charset))
-            //{
-            //    if (string.Equals(charset, "utf-8", StringComparison.OrdinalIgnoreCase))
-            //    {
-            //        return null;
-            //    }
+            if (!string.IsNullOrWhiteSpace(charset))
+            {
+                if (string.Equals(charset, "utf-8", StringComparison.OrdinalIgnoreCase))
+                {
+                    return null;
+                }
 
-            //    return charset;
-            //}
+                return charset;
+            }
 
             if (GetFileEncoding(path).Equals(Encoding.UTF8))
             {