Fix subtitle extraction when input path contains quotes

MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs

@@ -501,11 +501,11 @@ namespace MediaBrowser.MediaEncoding.Subtitles
             List<MediaStream> subtitleStreams,
             CancellationToken cancellationToken)
         {
-            var inputPath = mediaSource.Path;
+            var inputPath = _mediaEncoder.GetInputArgument(mediaSource.Path, mediaSource);
             var outputPaths = new List<string>();
             var args = string.Format(
                 CultureInfo.InvariantCulture,
-                "-i \"{0}\" -copyts",
+                "-i {0} -copyts",
                 inputPath);
 
             foreach (var subtitleStream in subtitleStreams)
@@ -676,7 +676,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
 
             var processArgs = string.Format(
                 CultureInfo.InvariantCulture,
-                "-i \"{0}\" -copyts -map 0:{1} -an -vn -c:s {2} \"{3}\"",
+                "-i {0} -copyts -map 0:{1} -an -vn -c:s {2} \"{3}\"",
                 inputPath,
                 subtitleStreamIndex,
                 outputCodec,