1 files changed, 5 insertions, 4 deletions
diff --git a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
index d19538730..39bec8da1 100644
--- a/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
@@ -25,7 +25,7 @@ using UtfUnknown;
 
 namespace MediaBrowser.MediaEncoding.Subtitles
 {
-    public class SubtitleEncoder : ISubtitleEncoder
+    public sealed class SubtitleEncoder : ISubtitleEncoder
     {
         private readonly ILogger<SubtitleEncoder> _logger;
         private readonly IApplicationPaths _appPaths;
@@ -484,7 +484,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
             {
                 _logger.LogError("ffmpeg subtitle conversion failed for {Path}", inputPath);
 
-                throw new Exception(
+                throw new FfmpegException(
                     string.Format(CultureInfo.InvariantCulture, "ffmpeg subtitle conversion failed for {0}", inputPath));
             }
 
@@ -637,7 +637,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
 
                 _logger.LogError(msg);
 
-                throw new Exception(msg);
+                throw new FfmpegException(msg);
             }
             else
             {
@@ -677,7 +677,8 @@ namespace MediaBrowser.MediaEncoding.Subtitles
 
             if (!string.Equals(text, newText, StringComparison.Ordinal))
             {
-                using (var fileStream = new FileStream(file, FileMode.Create, FileAccess.Write, FileShare.Read))
+                // use FileShare.None as this bypasses dotnet bug dotnet/runtime#42790 .
+                using (var fileStream = new FileStream(file, FileMode.Create, FileAccess.Write, FileShare.None))
                 using (var writer = new StreamWriter(fileStream, encoding))
                 {
                     await writer.WriteAsync(newText.AsMemory(), cancellationToken).ConfigureAwait(false);