5 files changed, 6 insertions, 26 deletions
diff --git a/Jellyfin.Api/Controllers/RemoteImageController.cs b/Jellyfin.Api/Controllers/RemoteImageController.cs
index bcb2b50c7a..8a33b12f4c 100644
--- a/Jellyfin.Api/Controllers/RemoteImageController.cs
+++ b/Jellyfin.Api/Controllers/RemoteImageController.cs
@@ -206,7 +206,7 @@ namespace Jellyfin.Api.Controllers
             var fullCacheDirectory = Path.GetDirectoryName(fullCachePath) ?? throw new ResourceNotFoundException($"Provided path ({fullCachePath}) is not valid.");
             Directory.CreateDirectory(fullCacheDirectory);
             // use FileShare.None as this bypasses dotnet bug dotnet/runtime#42790 .
-            await using var fileStream = new FileStream(fullCachePath, FileMode.Create, FileAccess.Write, FileShare.None, IODefaults.FileStreamBufferSize, AsyncFile.UseAsyncIO);
+            await using var fileStream = new FileStream(fullCachePath, FileMode.Create, FileAccess.Write, FileShare.None, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous);
             await response.Content.CopyToAsync(fileStream).ConfigureAwait(false);
 
             var pointerCacheDirectory = Path.GetDirectoryName(pointerCachePath) ?? throw new ArgumentException($"Provided path ({pointerCachePath}) is not valid.", nameof(pointerCachePath));
diff --git a/Jellyfin.Api/Controllers/SystemController.cs b/Jellyfin.Api/Controllers/SystemController.cs
index e6584f0fe6..741bdfee97 100644
--- a/Jellyfin.Api/Controllers/SystemController.cs
+++ b/Jellyfin.Api/Controllers/SystemController.cs
@@ -201,7 +201,7 @@ namespace Jellyfin.Api.Controllers
 
             // For older files, assume fully static
             var fileShare = file.LastWriteTimeUtc < DateTime.UtcNow.AddHours(-1) ? FileShare.Read : FileShare.ReadWrite;
-            FileStream stream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read, fileShare, IODefaults.FileStreamBufferSize, AsyncFile.UseAsyncIO);
+            FileStream stream = new FileStream(file.FullName, FileMode.Open, FileAccess.Read, fileShare, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous);
             return File(stream, "text/plain; charset=utf-8");
         }
 
diff --git a/Jellyfin.Api/Helpers/HlsHelpers.cs b/Jellyfin.Api/Helpers/HlsHelpers.cs
index f36769dc2a..4567621470 100644
--- a/Jellyfin.Api/Helpers/HlsHelpers.cs
+++ b/Jellyfin.Api/Helpers/HlsHelpers.cs
@@ -38,7 +38,7 @@ namespace Jellyfin.Api.Helpers
                         FileAccess.Read,
                         FileShare.ReadWrite,
                         IODefaults.FileStreamBufferSize,
-                        (AsyncFile.UseAsyncIO ? FileOptions.Asynchronous : FileOptions.None) | FileOptions.SequentialScan);
+                        FileOptions.Asynchronous | FileOptions.SequentialScan);
                     await using (fileStream.ConfigureAwait(false))
                     {
                         using var reader = new StreamReader(fileStream);
diff --git a/Jellyfin.Api/Helpers/ProgressiveFileStream.cs b/Jellyfin.Api/Helpers/ProgressiveFileStream.cs
index c570183514..61e18220a1 100644
--- a/Jellyfin.Api/Helpers/ProgressiveFileStream.cs
+++ b/Jellyfin.Api/Helpers/ProgressiveFileStream.cs
@@ -17,7 +17,6 @@ namespace Jellyfin.Api.Helpers
         private readonly TranscodingJobDto? _job;
         private readonly TranscodingJobHelper? _transcodingJobHelper;
         private readonly int _timeoutMs;
-        private readonly bool _allowAsyncFileRead;
         private int _bytesWritten;
         private bool _disposed;
 
@@ -34,17 +33,7 @@ namespace Jellyfin.Api.Helpers
             _transcodingJobHelper = transcodingJobHelper;
             _timeoutMs = timeoutMs;
 
-            var fileOptions = FileOptions.SequentialScan;
-            _allowAsyncFileRead = false;
-
-            // use non-async filestream along with read due to https://github.com/dotnet/corefx/issues/6039
-            if (AsyncFile.UseAsyncIO)
-            {
-                fileOptions |= FileOptions.Asynchronous;
-                _allowAsyncFileRead = true;
-            }
-
-            _stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, IODefaults.FileStreamBufferSize, fileOptions);
+            _stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous | FileOptions.SequentialScan);
         }
 
         /// <summary>
@@ -57,7 +46,6 @@ namespace Jellyfin.Api.Helpers
             _job = null;
             _transcodingJobHelper = null;
             _timeoutMs = timeoutMs;
-            _allowAsyncFileRead = AsyncFile.UseAsyncIO;
             _stream = stream;
         }
 
@@ -103,15 +91,7 @@ namespace Jellyfin.Api.Helpers
             while (remainingBytesToRead > 0)
             {
                 cancellationToken.ThrowIfCancellationRequested();
-                int bytesRead;
-                if (_allowAsyncFileRead)
-                {
-                    bytesRead = await _stream.ReadAsync(buffer, newOffset, remainingBytesToRead, cancellationToken).ConfigureAwait(false);
-                }
-                else
-                {
-                    bytesRead = _stream.Read(buffer, newOffset, remainingBytesToRead);
-                }
+                int bytesRead = await _stream.ReadAsync(buffer, newOffset, remainingBytesToRead, cancellationToken).ConfigureAwait(false);
 
                 remainingBytesToRead -= bytesRead;
                 newOffset += bytesRead;
diff --git a/Jellyfin.Api/Helpers/TranscodingJobHelper.cs b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
index 4e1e98df0d..14f287aef6 100644
--- a/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
+++ b/Jellyfin.Api/Helpers/TranscodingJobHelper.cs
@@ -557,7 +557,7 @@ namespace Jellyfin.Api.Helpers
                 $"{logFilePrefix}{DateTime.Now:yyyy-MM-dd_HH-mm-ss}_{state.Request.MediaSourceId}_{Guid.NewGuid().ToString()[..8]}.log");
 
             // FFmpeg writes debug/error info to stderr. This is useful when debugging so let's put it in the log directory.
-            Stream logStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, IODefaults.FileStreamBufferSize, AsyncFile.UseAsyncIO);
+            Stream logStream = new FileStream(logFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, IODefaults.FileStreamBufferSize, FileOptions.Asynchronous);
 
             var commandLineLogMessageBytes = Encoding.UTF8.GetBytes(request.Path + Environment.NewLine + Environment.NewLine + JsonSerializer.Serialize(state.MediaSource) + Environment.NewLine + Environment.NewLine + commandLineLogMessage + Environment.NewLine + Environment.NewLine);
             await logStream.WriteAsync(commandLineLogMessageBytes, 0, commandLineLogMessageBytes.Length, cancellationTokenSource.Token).ConfigureAwait(false);