Add alltilla to CONTRIBUTORS.md

Signed-off-by: Attila Szakacs <szakacs.attila96@gmail.com>

CONTRIBUTORS.md

@@ -4,6 +4,7 @@
  - [97carmine](https://github.com/97carmine)
  - [Abbe98](https://github.com/Abbe98)
  - [agrenott](https://github.com/agrenott)
+ - [alltilla](https://github.com/alltilla)
  - [AndreCarvalho](https://github.com/AndreCarvalho)
  - [anthonylavado](https://github.com/anthonylavado)
  - [Artiume](https://github.com/Artiume)

MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs

@@ -472,8 +472,8 @@ namespace MediaBrowser.MediaEncoding.Subtitles
         /// <returns>Task.</returns>
         private async Task ExtractAllTextSubtitles(MediaSourceInfo mediaSource, CancellationToken cancellationToken)
         {
-            var semaphores = new List<SemaphoreSlim> { };
-            var extractableStreams = new List<MediaStream> { };
+            var semaphores = new List<SemaphoreSlim>();
+            var extractableStreams = new List<MediaStream>();
 
             try
             {
@@ -521,7 +521,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
             CancellationToken cancellationToken)
         {
             var inputPath = mediaSource.Path;
-            var outputPaths = new List<string> { };
+            var outputPaths = new List<string>();
             var args = string.Format(
                 CultureInfo.InvariantCulture,
                 "-i {0} -copyts",
@@ -531,6 +531,13 @@ namespace MediaBrowser.MediaEncoding.Subtitles
             {
                 var outputPath = GetSubtitleCachePath(mediaSource, subtitleStream.Index, "." + GetTextSubtitleFormat(subtitleStream));
                 var outputCodec = IsCodecCopyable(subtitleStream.Codec) ? "copy" : "srt";
+                var streamIndex = EncodingHelper.FindIndex(mediaSource.MediaStreams, subtitleStream);
+
+                if (streamIndex == -1)
+                {
+                    _logger.LogError("Cannot find subtitle stream index for {InputPath} ({Index}), skipping this stream", inputPath, subtitleStream.Index);
+                    continue;
+                }
 
                 Directory.CreateDirectory(Path.GetDirectoryName(outputPath) ?? throw new FileNotFoundException($"Calculated path ({outputPath}) is not valid."));
 
@@ -538,7 +545,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                 args += string.Format(
                     CultureInfo.InvariantCulture,
                     " -map 0:{0} -an -vn -c:s {1} \"{2}\"",
-                    subtitleStream.Index,
+                    streamIndex,
                     outputCodec,
                     outputPath);
             }
@@ -614,9 +621,9 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                     {
                         _logger.LogError("ffmpeg subtitle extraction failed for {InputPath} to {OutputPath}", inputPath, outputPath);
                         failed = true;
+                        continue;
                     }
-                    else
-                    {
+
                     if (outputPath.EndsWith("ass", StringComparison.OrdinalIgnoreCase))
                     {
                         await SetAssFont(outputPath, cancellationToken).ConfigureAwait(false);
@@ -625,7 +632,6 @@ namespace MediaBrowser.MediaEncoding.Subtitles
                     _logger.LogInformation("ffmpeg subtitle extraction completed for {InputPath} to {OutputPath}", inputPath, outputPath);
                 }
             }
-            }
 
             if (failed)
             {