Merge branch 'master' into bhowe34/fix-replace-missing-metadata-for-music

29 files changed, 244 insertions, 165 deletions

diff --git a/Jellyfin.Api/Controllers/ArtistsController.cs b/Jellyfin.Api/Controllers/ArtistsController.cs
index e7d3e694a..8b931f162 100644
--- a/Jellyfin.Api/Controllers/ArtistsController.cs
+++ b/Jellyfin.Api/Controllers/ArtistsController.cs
@@ -6,6 +6,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -126,7 +127,7 @@ public class ArtistsController : BaseJellyfinApiController
         User? user = null;
         BaseItem parentItem = _libraryManager.GetParentItem(parentId, userId);
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             user = _userManager.GetUserById(userId.Value);
         }
@@ -330,7 +331,7 @@ public class ArtistsController : BaseJellyfinApiController
         User? user = null;
         BaseItem parentItem = _libraryManager.GetParentItem(parentId, userId);
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             user = _userManager.GetUserById(userId.Value);
         }
@@ -469,7 +470,7 @@ public class ArtistsController : BaseJellyfinApiController
 
         var item = _libraryManager.GetArtist(name, dtoOptions);
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             var user = _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/AudioController.cs b/Jellyfin.Api/Controllers/AudioController.cs
index 5bc533086..cd09d2bfa 100644
--- a/Jellyfin.Api/Controllers/AudioController.cs
+++ b/Jellyfin.Api/Controllers/AudioController.cs
@@ -6,6 +6,7 @@ using Jellyfin.Api.Attributes;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.Models.StreamingDtos;
 using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Streaming;
 using MediaBrowser.Model.Dlna;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
diff --git a/Jellyfin.Api/Controllers/ChannelsController.cs b/Jellyfin.Api/Controllers/ChannelsController.cs
index fdc16ee23..f83c71b57 100644
--- a/Jellyfin.Api/Controllers/ChannelsController.cs
+++ b/Jellyfin.Api/Controllers/ChannelsController.cs
@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Channels;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
@@ -126,7 +127,7 @@ public class ChannelsController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] ItemFields[] fields)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -201,7 +202,7 @@ public class ChannelsController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] Guid[] channelIds)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/DevicesController.cs b/Jellyfin.Api/Controllers/DevicesController.cs
index aa200a722..6d9ec343e 100644
--- a/Jellyfin.Api/Controllers/DevicesController.cs
+++ b/Jellyfin.Api/Controllers/DevicesController.cs
@@ -42,16 +42,15 @@ public class DevicesController : BaseJellyfinApiController
     /// <summary>
     /// Get Devices.
     /// </summary>
-    /// <param name="supportsSync">Gets or sets a value indicating whether [supports synchronize].</param>
     /// <param name="userId">Gets or sets the user identifier.</param>
     /// <response code="200">Devices retrieved.</response>
     /// <returns>An <see cref="OkResult"/> containing the list of devices.</returns>
     [HttpGet]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    public async Task<ActionResult<QueryResult<DeviceInfo>>> GetDevices([FromQuery] bool? supportsSync, [FromQuery] Guid? userId)
+    public async Task<ActionResult<QueryResult<DeviceInfo>>> GetDevices([FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        return await _deviceManager.GetDevicesForUser(userId, supportsSync).ConfigureAwait(false);
+        return await _deviceManager.GetDevicesForUser(userId).ConfigureAwait(false);
     }
 
     /// <summary>
diff --git a/Jellyfin.Api/Controllers/DynamicHlsController.cs b/Jellyfin.Api/Controllers/DynamicHlsController.cs
index 9e9c610cc..dda1e9d56 100644
--- a/Jellyfin.Api/Controllers/DynamicHlsController.cs
+++ b/Jellyfin.Api/Controllers/DynamicHlsController.cs
@@ -9,8 +9,8 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using Jellyfin.Api.Attributes;
+using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
-using Jellyfin.Api.Models.PlaybackDtos;
 using Jellyfin.Api.Models.StreamingDtos;
 using Jellyfin.Data.Enums;
 using Jellyfin.Extensions;
@@ -19,6 +19,7 @@ using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Streaming;
 using MediaBrowser.MediaEncoding.Encoder;
 using MediaBrowser.Model.Configuration;
 using MediaBrowser.Model.Dlna;
@@ -51,7 +52,7 @@ public class DynamicHlsController : BaseJellyfinApiController
     private readonly IServerConfigurationManager _serverConfigurationManager;
     private readonly IMediaEncoder _mediaEncoder;
     private readonly IFileSystem _fileSystem;
-    private readonly TranscodingJobHelper _transcodingJobHelper;
+    private readonly ITranscodeManager _transcodeManager;
     private readonly ILogger<DynamicHlsController> _logger;
     private readonly EncodingHelper _encodingHelper;
     private readonly IDynamicHlsPlaylistGenerator _dynamicHlsPlaylistGenerator;
@@ -67,7 +68,7 @@ public class DynamicHlsController : BaseJellyfinApiController
     /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
     /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
     /// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
-    /// <param name="transcodingJobHelper">Instance of the <see cref="TranscodingJobHelper"/> class.</param>
+    /// <param name="transcodeManager">Instance of the <see cref="ITranscodeManager"/> interface.</param>
     /// <param name="logger">Instance of the <see cref="ILogger{DynamicHlsController}"/> interface.</param>
     /// <param name="dynamicHlsHelper">Instance of <see cref="DynamicHlsHelper"/>.</param>
     /// <param name="encodingHelper">Instance of <see cref="EncodingHelper"/>.</param>
@@ -79,7 +80,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         IServerConfigurationManager serverConfigurationManager,
         IMediaEncoder mediaEncoder,
         IFileSystem fileSystem,
-        TranscodingJobHelper transcodingJobHelper,
+        ITranscodeManager transcodeManager,
         ILogger<DynamicHlsController> logger,
         DynamicHlsHelper dynamicHlsHelper,
         EncodingHelper encodingHelper,
@@ -91,7 +92,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         _serverConfigurationManager = serverConfigurationManager;
         _mediaEncoder = mediaEncoder;
         _fileSystem = fileSystem;
-        _transcodingJobHelper = transcodingJobHelper;
+        _transcodeManager = transcodeManager;
         _logger = logger;
         _dynamicHlsHelper = dynamicHlsHelper;
         _encodingHelper = encodingHelper;
@@ -283,17 +284,17 @@ public class DynamicHlsController : BaseJellyfinApiController
                 _serverConfigurationManager,
                 _mediaEncoder,
                 _encodingHelper,
-                _transcodingJobHelper,
+                _transcodeManager,
                 TranscodingJobType,
                 cancellationToken)
             .ConfigureAwait(false);
 
-        TranscodingJobDto? job = null;
+        TranscodingJob? job = null;
         var playlistPath = Path.ChangeExtension(state.OutputFilePath, ".m3u8");
 
         if (!System.IO.File.Exists(playlistPath))
         {
-            var transcodingLock = _transcodingJobHelper.GetTranscodingLock(playlistPath);
+            var transcodingLock = _transcodeManager.GetTranscodingLock(playlistPath);
             await transcodingLock.WaitAsync(cancellationToken).ConfigureAwait(false);
             try
             {
@@ -302,11 +303,11 @@ public class DynamicHlsController : BaseJellyfinApiController
                     // If the playlist doesn't already exist, startup ffmpeg
                     try
                     {
-                        job = await _transcodingJobHelper.StartFfMpeg(
+                        job = await _transcodeManager.StartFfMpeg(
                                 state,
                                 playlistPath,
                                 GetCommandLineArguments(playlistPath, state, true, 0),
-                                Request,
+                                Request.HttpContext.User.GetUserId(),
                                 TranscodingJobType,
                                 cancellationTokenSource)
                             .ConfigureAwait(false);
@@ -331,11 +332,11 @@ public class DynamicHlsController : BaseJellyfinApiController
             }
         }
 
-        job ??= _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
+        job ??= _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
 
         if (job is not null)
         {
-            _transcodingJobHelper.OnTranscodeEndRequest(job);
+            _transcodeManager.OnTranscodeEndRequest(job);
         }
 
         var playlistText = HlsHelpers.GetLivePlaylistText(playlistPath, state);
@@ -1383,7 +1384,7 @@ public class DynamicHlsController : BaseJellyfinApiController
                 _serverConfigurationManager,
                 _mediaEncoder,
                 _encodingHelper,
-                _transcodingJobHelper,
+                _transcodeManager,
                 TranscodingJobType,
                 cancellationTokenSource.Token)
             .ConfigureAwait(false);
@@ -1421,7 +1422,7 @@ public class DynamicHlsController : BaseJellyfinApiController
                 _serverConfigurationManager,
                 _mediaEncoder,
                 _encodingHelper,
-                _transcodingJobHelper,
+                _transcodeManager,
                 TranscodingJobType,
                 cancellationToken)
             .ConfigureAwait(false);
@@ -1432,16 +1433,16 @@ public class DynamicHlsController : BaseJellyfinApiController
 
         var segmentExtension = EncodingHelper.GetSegmentFileExtension(state.Request.SegmentContainer);
 
-        TranscodingJobDto? job;
+        TranscodingJob? job;
 
         if (System.IO.File.Exists(segmentPath))
         {
-            job = _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
+            job = _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
             _logger.LogDebug("returning {0} [it exists, try 1]", segmentPath);
             return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, segmentId, job, cancellationToken).ConfigureAwait(false);
         }
 
-        var transcodingLock = _transcodingJobHelper.GetTranscodingLock(playlistPath);
+        var transcodingLock = _transcodeManager.GetTranscodingLock(playlistPath);
         await transcodingLock.WaitAsync(cancellationToken).ConfigureAwait(false);
         var released = false;
         var startTranscoding = false;
@@ -1450,7 +1451,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         {
             if (System.IO.File.Exists(segmentPath))
             {
-                job = _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
+                job = _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
                 transcodingLock.Release();
                 released = true;
                 _logger.LogDebug("returning {0} [it exists, try 2]", segmentPath);
@@ -1488,7 +1489,7 @@ public class DynamicHlsController : BaseJellyfinApiController
                     // If the playlist doesn't already exist, startup ffmpeg
                     try
                     {
-                        await _transcodingJobHelper.KillTranscodingJobs(streamingRequest.DeviceId, streamingRequest.PlaySessionId, p => false)
+                        await _transcodeManager.KillTranscodingJobs(streamingRequest.DeviceId, streamingRequest.PlaySessionId, p => false)
                             .ConfigureAwait(false);
 
                         if (currentTranscodingIndex.HasValue)
@@ -1499,11 +1500,11 @@ public class DynamicHlsController : BaseJellyfinApiController
                         streamingRequest.StartTimeTicks = streamingRequest.CurrentRuntimeTicks;
 
                         state.WaitForPath = segmentPath;
-                        job = await _transcodingJobHelper.StartFfMpeg(
+                        job = await _transcodeManager.StartFfMpeg(
                             state,
                             playlistPath,
                             GetCommandLineArguments(playlistPath, state, false, segmentId),
-                            Request,
+                            Request.HttpContext.User.GetUserId(),
                             TranscodingJobType,
                             cancellationTokenSource).ConfigureAwait(false);
                     }
@@ -1517,7 +1518,7 @@ public class DynamicHlsController : BaseJellyfinApiController
                 }
                 else
                 {
-                    job = _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
+                    job = _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
                     if (job?.TranscodingThrottler is not null)
                     {
                         await job.TranscodingThrottler.UnpauseTranscoding().ConfigureAwait(false);
@@ -1534,7 +1535,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         }
 
         _logger.LogDebug("returning {0} [general case]", segmentPath);
-        job ??= _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
+        job ??= _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType);
         return await GetSegmentResult(state, playlistPath, segmentPath, segmentExtension, segmentId, job, cancellationToken).ConfigureAwait(false);
     }
 
@@ -1922,7 +1923,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         string segmentPath,
         string segmentExtension,
         int segmentIndex,
-        TranscodingJobDto? transcodingJob,
+        TranscodingJob? transcodingJob,
         CancellationToken cancellationToken)
     {
         var segmentExists = System.IO.File.Exists(segmentPath);
@@ -1991,7 +1992,7 @@ public class DynamicHlsController : BaseJellyfinApiController
         return GetSegmentResult(state, segmentPath, transcodingJob);
     }
 
-    private ActionResult GetSegmentResult(StreamState state, string segmentPath, TranscodingJobDto? transcodingJob)
+    private ActionResult GetSegmentResult(StreamState state, string segmentPath, TranscodingJob? transcodingJob)
     {
         var segmentEndingPositionTicks = state.Request.CurrentRuntimeTicks + state.Request.ActualSegmentLengthTicks;
 
@@ -2001,7 +2002,7 @@ public class DynamicHlsController : BaseJellyfinApiController
             if (transcodingJob is not null)
             {
                 transcodingJob.DownloadPositionTicks = Math.Max(transcodingJob.DownloadPositionTicks ?? segmentEndingPositionTicks, segmentEndingPositionTicks);
-                _transcodingJobHelper.OnTranscodeEndRequest(transcodingJob);
+                _transcodeManager.OnTranscodeEndRequest(transcodingJob);
             }
 
             return Task.CompletedTask;
@@ -2012,7 +2013,7 @@ public class DynamicHlsController : BaseJellyfinApiController
 
     private int? GetCurrentTranscodingIndex(string playlist, string segmentExtension)
     {
-        var job = _transcodingJobHelper.GetTranscodingJob(playlist, TranscodingJobType);
+        var job = _transcodeManager.GetTranscodingJob(playlist, TranscodingJobType);
 
         if (job is null || job.HasExited)
         {
diff --git a/Jellyfin.Api/Controllers/FilterController.cs b/Jellyfin.Api/Controllers/FilterController.cs
index baeb8b81a..d6e043e6a 100644
--- a/Jellyfin.Api/Controllers/FilterController.cs
+++ b/Jellyfin.Api/Controllers/FilterController.cs
@@ -3,6 +3,7 @@ using System.Linq;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -53,7 +54,7 @@ public class FilterController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] MediaType[] mediaTypes)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -146,7 +147,7 @@ public class FilterController : BaseJellyfinApiController
         [FromQuery] bool? recursive)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/GenresController.cs b/Jellyfin.Api/Controllers/GenresController.cs
index 062e1062d..54d48aec2 100644
--- a/Jellyfin.Api/Controllers/GenresController.cs
+++ b/Jellyfin.Api/Controllers/GenresController.cs
@@ -6,6 +6,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -95,7 +96,7 @@ public class GenresController : BaseJellyfinApiController
             .AddClientFields(User)
             .AddAdditionalDtoOptions(enableImages, false, imageTypeLimit, enableImageTypes);
 
-        User? user = userId.Value.Equals(default)
+        User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -131,8 +132,8 @@ public class GenresController : BaseJellyfinApiController
 
         QueryResult<(BaseItem, ItemCounts)> result;
         if (parentItem is ICollectionFolder parentCollectionFolder
-            && (parentCollectionFolder.CollectionType == CollectionType.Music
-                || parentCollectionFolder.CollectionType == CollectionType.MusicVideos))
+            && (parentCollectionFolder.CollectionType == CollectionType.music
+                || parentCollectionFolder.CollectionType == CollectionType.musicvideos))
         {
             result = _libraryManager.GetMusicGenres(query);
         }
@@ -172,7 +173,7 @@ public class GenresController : BaseJellyfinApiController
 
         item ??= new Genre();
 
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/HlsSegmentController.cs b/Jellyfin.Api/Controllers/HlsSegmentController.cs
index 392d9955f..1927a332b 100644
--- a/Jellyfin.Api/Controllers/HlsSegmentController.cs
+++ b/Jellyfin.Api/Controllers/HlsSegmentController.cs
@@ -24,22 +24,22 @@ public class HlsSegmentController : BaseJellyfinApiController
 {
     private readonly IFileSystem _fileSystem;
     private readonly IServerConfigurationManager _serverConfigurationManager;
-    private readonly TranscodingJobHelper _transcodingJobHelper;
+    private readonly ITranscodeManager _transcodeManager;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="HlsSegmentController"/> class.
     /// </summary>
     /// <param name="fileSystem">Instance of the <see cref="IFileSystem"/> interface.</param>
     /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
-    /// <param name="transcodingJobHelper">Initialized instance of the <see cref="TranscodingJobHelper"/>.</param>
+    /// <param name="transcodeManager">Instance of the <see cref="ITranscodeManager"/> interface.</param>
     public HlsSegmentController(
         IFileSystem fileSystem,
         IServerConfigurationManager serverConfigurationManager,
-        TranscodingJobHelper transcodingJobHelper)
+        ITranscodeManager transcodeManager)
     {
         _fileSystem = fileSystem;
         _serverConfigurationManager = serverConfigurationManager;
-        _transcodingJobHelper = transcodingJobHelper;
+        _transcodeManager = transcodeManager;
     }
 
     /// <summary>
@@ -112,7 +112,7 @@ public class HlsSegmentController : BaseJellyfinApiController
         [FromQuery, Required] string deviceId,
         [FromQuery, Required] string playSessionId)
     {
-        _transcodingJobHelper.KillTranscodingJobs(deviceId, playSessionId, path => true);
+        _transcodeManager.KillTranscodingJobs(deviceId, playSessionId, _ => true);
         return NoContent();
     }
 
@@ -174,13 +174,13 @@ public class HlsSegmentController : BaseJellyfinApiController
 
     private ActionResult GetFileResult(string path, string playlistPath)
     {
-        var transcodingJob = _transcodingJobHelper.OnTranscodeBeginRequest(playlistPath, TranscodingJobType.Hls);
+        var transcodingJob = _transcodeManager.OnTranscodeBeginRequest(playlistPath, TranscodingJobType.Hls);
 
         Response.OnCompleted(() =>
         {
             if (transcodingJob is not null)
             {
-                _transcodingJobHelper.OnTranscodeEndRequest(transcodingJob);
+                _transcodeManager.OnTranscodeEndRequest(transcodingJob);
             }
 
             return Task.CompletedTask;
diff --git a/Jellyfin.Api/Controllers/InstantMixController.cs b/Jellyfin.Api/Controllers/InstantMixController.cs
index 4dc2a4253..e7ff1f986 100644
--- a/Jellyfin.Api/Controllers/InstantMixController.cs
+++ b/Jellyfin.Api/Controllers/InstantMixController.cs
@@ -5,6 +5,7 @@ using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -76,7 +77,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var item = _libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -113,7 +114,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var album = _libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -150,7 +151,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var playlist = (Playlist)_libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -186,7 +187,7 @@ public class InstantMixController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] ImageType[] enableImageTypes)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -223,7 +224,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var item = _libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -260,7 +261,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var item = _libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -334,7 +335,7 @@ public class InstantMixController : BaseJellyfinApiController
     {
         var item = _libraryManager.GetItemById(id);
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
diff --git a/Jellyfin.Api/Controllers/ItemUpdateController.cs b/Jellyfin.Api/Controllers/ItemUpdateController.cs
index 4e5ed60d5..9800248c6 100644
--- a/Jellyfin.Api/Controllers/ItemUpdateController.cs
+++ b/Jellyfin.Api/Controllers/ItemUpdateController.cs
@@ -171,7 +171,7 @@ public class ItemUpdateController : BaseJellyfinApiController
                 info.ContentTypeOptions = GetContentTypeOptions(true).ToArray();
                 info.ContentType = configuredContentType;
 
-                if (inheritedContentType is null || inheritedContentType == CollectionType.TvShows)
+                if (inheritedContentType is null || inheritedContentType == CollectionType.tvshows)
                 {
                     info.ContentTypeOptions = info.ContentTypeOptions
                         .Where(i => string.IsNullOrWhiteSpace(i.Value)
diff --git a/Jellyfin.Api/Controllers/ItemsController.cs b/Jellyfin.Api/Controllers/ItemsController.cs
index 4e46e808a..d10fba920 100644
--- a/Jellyfin.Api/Controllers/ItemsController.cs
+++ b/Jellyfin.Api/Controllers/ItemsController.cs
@@ -5,6 +5,7 @@ using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
@@ -34,6 +35,7 @@ public class ItemsController : BaseJellyfinApiController
     private readonly IDtoService _dtoService;
     private readonly ILogger<ItemsController> _logger;
     private readonly ISessionManager _sessionManager;
+    private readonly IUserDataManager _userDataRepository;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="ItemsController"/> class.
@@ -44,13 +46,15 @@ public class ItemsController : BaseJellyfinApiController
     /// <param name="dtoService">Instance of the <see cref="IDtoService"/> interface.</param>
     /// <param name="logger">Instance of the <see cref="ILogger"/> interface.</param>
     /// <param name="sessionManager">Instance of the <see cref="ISessionManager"/> interface.</param>
+    /// <param name="userDataRepository">Instance of the <see cref="IUserDataManager"/> interface.</param>
     public ItemsController(
         IUserManager userManager,
         ILibraryManager libraryManager,
         ILocalizationManager localization,
         IDtoService dtoService,
         ILogger<ItemsController> logger,
-        ISessionManager sessionManager)
+        ISessionManager sessionManager,
+        IUserDataManager userDataRepository)
     {
         _userManager = userManager;
         _libraryManager = libraryManager;
@@ -58,6 +62,7 @@ public class ItemsController : BaseJellyfinApiController
         _dtoService = dtoService;
         _logger = logger;
         _sessionManager = sessionManager;
+        _userDataRepository = userDataRepository;
     }
 
     /// <summary>
@@ -241,7 +246,7 @@ public class ItemsController : BaseJellyfinApiController
         var isApiKey = User.GetIsApiKey();
         // if api key is used (auth.IsApiKey == true), then `user` will be null throughout this method
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = !isApiKey && !userId.Value.Equals(default)
+        var user = !isApiKey && !userId.IsNullOrEmpty()
             ? _userManager.GetUserById(userId.Value) ?? throw new ResourceNotFoundException()
             : null;
 
@@ -275,7 +280,7 @@ public class ItemsController : BaseJellyfinApiController
             collectionType = hasCollectionType.CollectionType;
         }
 
-        if (collectionType == CollectionType.Playlists)
+        if (collectionType == CollectionType.playlists)
         {
             recursive = true;
             includeItemTypes = new[] { BaseItemKind.Playlist };
@@ -836,7 +841,7 @@ public class ItemsController : BaseJellyfinApiController
         var ancestorIds = Array.Empty<Guid>();
 
         var excludeFolderIds = user.GetPreferenceValues<Guid>(PreferenceKind.LatestItemExcludes);
-        if (parentIdGuid.Equals(default) && excludeFolderIds.Length > 0)
+        if (parentIdGuid.IsEmpty() && excludeFolderIds.Length > 0)
         {
             ancestorIds = _libraryManager.GetUserRootFolder().GetChildren(user, true)
                 .Where(i => i is Folder)
@@ -881,4 +886,64 @@ public class ItemsController : BaseJellyfinApiController
             itemsResult.TotalRecordCount,
             returnItems);
     }
+
+    /// <summary>
+    /// Get Item User Data.
+    /// </summary>
+    /// <param name="userId">The user id.</param>
+    /// <param name="itemId">The item id.</param>
+    /// <response code="200">return item user data.</response>
+    /// <response code="404">Item is not found.</response>
+    /// <returns>Return <see cref="UserItemDataDto"/>.</returns>
+    [HttpGet("Users/{userId}/Items/{itemId}/UserData")]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public ActionResult<UserItemDataDto> GetItemUserData(
+        [FromRoute, Required] Guid userId,
+        [FromRoute, Required] Guid itemId)
+    {
+        if (!RequestHelpers.AssertCanUpdateUser(_userManager, User, userId, true))
+        {
+            return StatusCode(StatusCodes.Status403Forbidden, "User is not allowed to view this item user data.");
+        }
+
+        var user = _userManager.GetUserById(userId) ?? throw new ResourceNotFoundException();
+        var item = _libraryManager.GetItemById(itemId);
+
+        return (item == null) ? NotFound() : _userDataRepository.GetUserDataDto(item, user);
+    }
+
+    /// <summary>
+    /// Update Item User Data.
+    /// </summary>
+    /// <param name="userId">The user id.</param>
+    /// <param name="itemId">The item id.</param>
+    /// <param name="userDataDto">New user data object.</param>
+    /// <response code="200">return updated user item data.</response>
+    /// <response code="404">Item is not found.</response>
+    /// <returns>Return <see cref="UserItemDataDto"/>.</returns>
+    [HttpPost("Users/{userId}/Items/{itemId}/UserData")]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status404NotFound)]
+    public ActionResult<UserItemDataDto> UpdateItemUserData(
+        [FromRoute, Required] Guid userId,
+        [FromRoute, Required] Guid itemId,
+        [FromBody, Required] UpdateUserItemDataDto userDataDto)
+    {
+        if (!RequestHelpers.AssertCanUpdateUser(_userManager, User, userId, true))
+        {
+            return StatusCode(StatusCodes.Status403Forbidden, "User is not allowed to update this item user data.");
+        }
+
+        var user = _userManager.GetUserById(userId) ?? throw new ResourceNotFoundException();
+        var item = _libraryManager.GetItemById(itemId);
+        if (item == null)
+        {
+            return NotFound();
+        }
+
+        _userDataRepository.SaveUserData(user, item, userDataDto, UserDataSaveReason.UpdateUserData);
+
+        return _userDataRepository.GetUserDataDto(item, user);
+    }
 }
diff --git a/Jellyfin.Api/Controllers/LibraryController.cs b/Jellyfin.Api/Controllers/LibraryController.cs
index af9a93719..a0bbc961f 100644
--- a/Jellyfin.Api/Controllers/LibraryController.cs
+++ b/Jellyfin.Api/Controllers/LibraryController.cs
@@ -146,12 +146,12 @@ public class LibraryController : BaseJellyfinApiController
         [FromQuery] bool inheritFromParent = false)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
-        var item = itemId.Equals(default)
-            ? (userId.Value.Equals(default)
+        var item = itemId.IsEmpty()
+            ? (userId.IsNullOrEmpty()
                 ? _libraryManager.RootFolder
                 : _libraryManager.GetUserRootFolder())
             : _libraryManager.GetItemById(itemId);
@@ -213,12 +213,12 @@ public class LibraryController : BaseJellyfinApiController
         [FromQuery] bool inheritFromParent = false)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
-        var item = itemId.Equals(default)
-            ? (userId.Value.Equals(default)
+        var item = itemId.IsEmpty()
+            ? (userId.IsNullOrEmpty()
                 ? _libraryManager.RootFolder
                 : _libraryManager.GetUserRootFolder())
             : _libraryManager.GetItemById(itemId);
@@ -339,7 +339,7 @@ public class LibraryController : BaseJellyfinApiController
     {
         var isApiKey = User.GetIsApiKey();
         var userId = User.GetUserId();
-        var user = !isApiKey && !userId.Equals(default)
+        var user = !isApiKey && !userId.IsEmpty()
             ? _userManager.GetUserById(userId) ?? throw new ResourceNotFoundException()
             : null;
         if (!isApiKey && user is null)
@@ -382,7 +382,7 @@ public class LibraryController : BaseJellyfinApiController
     {
         var isApiKey = User.GetIsApiKey();
         var userId = User.GetUserId();
-        var user = !isApiKey && !userId.Equals(default)
+        var user = !isApiKey && !userId.IsEmpty()
             ? _userManager.GetUserById(userId) ?? throw new ResourceNotFoundException()
             : null;
 
@@ -428,7 +428,7 @@ public class LibraryController : BaseJellyfinApiController
         [FromQuery] bool? isFavorite)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -471,7 +471,7 @@ public class LibraryController : BaseJellyfinApiController
 
         var baseItemDtos = new List<BaseItemDto>();
 
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -702,8 +702,8 @@ public class LibraryController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] ItemFields[] fields)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var item = itemId.Equals(default)
-            ? (userId.Value.Equals(default)
+        var item = itemId.IsEmpty()
+            ? (userId.IsNullOrEmpty()
                 ? _libraryManager.RootFolder
                 : _libraryManager.GetUserRootFolder())
             : _libraryManager.GetItemById(itemId);
@@ -718,7 +718,7 @@ public class LibraryController : BaseJellyfinApiController
             return new QueryResult<BaseItemDto>();
         }
 
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
@@ -927,15 +927,15 @@ public class LibraryController : BaseJellyfinApiController
     {
         return contentType switch
         {
-            CollectionType.BoxSets => new[] { "BoxSet" },
-            CollectionType.Playlists => new[] { "Playlist" },
-            CollectionType.Movies => new[] { "Movie" },
-            CollectionType.TvShows => new[] { "Series", "Season", "Episode" },
-            CollectionType.Books => new[] { "Book" },
-            CollectionType.Music => new[] { "MusicArtist", "MusicAlbum", "Audio", "MusicVideo" },
-            CollectionType.HomeVideos => new[] { "Video", "Photo" },
-            CollectionType.Photos => new[] { "Video", "Photo" },
-            CollectionType.MusicVideos => new[] { "MusicVideo" },
+            CollectionType.boxsets => new[] { "BoxSet" },
+            CollectionType.playlists => new[] { "Playlist" },
+            CollectionType.movies => new[] { "Movie" },
+            CollectionType.tvshows => new[] { "Series", "Season", "Episode" },
+            CollectionType.books => new[] { "Book" },
+            CollectionType.music => new[] { "MusicArtist", "MusicAlbum", "Audio", "MusicVideo" },
+            CollectionType.homevideos => new[] { "Video", "Photo" },
+            CollectionType.photos => new[] { "Video", "Photo" },
+            CollectionType.musicvideos => new[] { "MusicVideo" },
             _ => new[] { "Series", "Season", "Episode", "Movie" }
         };
     }
diff --git a/Jellyfin.Api/Controllers/LiveTvController.cs b/Jellyfin.Api/Controllers/LiveTvController.cs
index 425086895..1b2f5750f 100644
--- a/Jellyfin.Api/Controllers/LiveTvController.cs
+++ b/Jellyfin.Api/Controllers/LiveTvController.cs
@@ -10,12 +10,12 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using Jellyfin.Api.Attributes;
-using Jellyfin.Api.Constants;
 using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Api.Models.LiveTvDtos;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Api;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Net;
@@ -24,6 +24,8 @@ using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Streaming;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.LiveTv;
@@ -41,43 +43,47 @@ namespace Jellyfin.Api.Controllers;
 public class LiveTvController : BaseJellyfinApiController
 {
     private readonly ILiveTvManager _liveTvManager;
+    private readonly ITunerHostManager _tunerHostManager;
     private readonly IUserManager _userManager;
     private readonly IHttpClientFactory _httpClientFactory;
     private readonly ILibraryManager _libraryManager;
     private readonly IDtoService _dtoService;
     private readonly IMediaSourceManager _mediaSourceManager;
     private readonly IConfigurationManager _configurationManager;
-    private readonly TranscodingJobHelper _transcodingJobHelper;
+    private readonly ITranscodeManager _transcodeManager;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="LiveTvController"/> class.
     /// </summary>
     /// <param name="liveTvManager">Instance of the <see cref="ILiveTvManager"/> interface.</param>
+    /// <param name="tunerHostManager">Instance of the <see cref="ITunerHostManager"/> interface.</param>
     /// <param name="userManager">Instance of the <see cref="IUserManager"/> interface.</param>
     /// <param name="httpClientFactory">Instance of the <see cref="IHttpClientFactory"/> interface.</param>
     /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
     /// <param name="dtoService">Instance of the <see cref="IDtoService"/> interface.</param>
     /// <param name="mediaSourceManager">Instance of the <see cref="IMediaSourceManager"/> interface.</param>
     /// <param name="configurationManager">Instance of the <see cref="IConfigurationManager"/> interface.</param>
-    /// <param name="transcodingJobHelper">Instance of the <see cref="TranscodingJobHelper"/> class.</param>
+    /// <param name="transcodeManager">Instance of the <see cref="ITranscodeManager"/> interface.</param>
     public LiveTvController(
         ILiveTvManager liveTvManager,
+        ITunerHostManager tunerHostManager,
         IUserManager userManager,
         IHttpClientFactory httpClientFactory,
         ILibraryManager libraryManager,
         IDtoService dtoService,
         IMediaSourceManager mediaSourceManager,
         IConfigurationManager configurationManager,
-        TranscodingJobHelper transcodingJobHelper)
+        ITranscodeManager transcodeManager)
     {
         _liveTvManager = liveTvManager;
+        _tunerHostManager = tunerHostManager;
         _userManager = userManager;
         _httpClientFactory = httpClientFactory;
         _libraryManager = libraryManager;
         _dtoService = dtoService;
         _mediaSourceManager = mediaSourceManager;
         _configurationManager = configurationManager;
-        _transcodingJobHelper = transcodingJobHelper;
+        _transcodeManager = transcodeManager;
     }
 
     /// <summary>
@@ -177,7 +183,7 @@ public class LiveTvController : BaseJellyfinApiController
             dtoOptions,
             CancellationToken.None);
 
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -209,10 +215,10 @@ public class LiveTvController : BaseJellyfinApiController
     public ActionResult<BaseItemDto> GetChannel([FromRoute, Required] Guid channelId, [FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
-        var item = channelId.Equals(default)
+        var item = channelId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(channelId);
 
@@ -382,7 +388,7 @@ public class LiveTvController : BaseJellyfinApiController
     public async Task<ActionResult<QueryResult<BaseItemDto>>> GetRecordingFolders([FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var folders = await _liveTvManager.GetRecordingFoldersAsync(user).ConfigureAwait(false);
@@ -405,10 +411,10 @@ public class LiveTvController : BaseJellyfinApiController
     public ActionResult<BaseItemDto> GetRecording([FromRoute, Required] Guid recordingId, [FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
-        var item = recordingId.Equals(default) ? _libraryManager.GetUserRootFolder() : _libraryManager.GetItemById(recordingId);
+        var item = recordingId.IsEmpty() ? _libraryManager.GetUserRootFolder() : _libraryManager.GetItemById(recordingId);
 
         var dtoOptions = new DtoOptions()
             .AddClientFields(User);
@@ -562,7 +568,7 @@ public class LiveTvController : BaseJellyfinApiController
         [FromQuery] bool enableTotalRecordCount = true)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -589,7 +595,7 @@ public class LiveTvController : BaseJellyfinApiController
             GenreIds = genreIds
         };
 
-        if (librarySeriesId.HasValue && !librarySeriesId.Equals(default))
+        if (!librarySeriesId.IsNullOrEmpty())
         {
             query.IsSeries = true;
 
@@ -618,7 +624,7 @@ public class LiveTvController : BaseJellyfinApiController
     [Authorize(Policy = Policies.LiveTvAccess)]
     public async Task<ActionResult<QueryResult<BaseItemDto>>> GetPrograms([FromBody] GetProgramsDto body)
     {
-        var user = body.UserId.Equals(default) ? null : _userManager.GetUserById(body.UserId);
+        var user = body.UserId.IsEmpty() ? null : _userManager.GetUserById(body.UserId);
 
         var query = new InternalItemsQuery(user)
         {
@@ -643,7 +649,7 @@ public class LiveTvController : BaseJellyfinApiController
             GenreIds = body.GenreIds
         };
 
-        if (!body.LibrarySeriesId.Equals(default))
+        if (!body.LibrarySeriesId.IsEmpty())
         {
             query.IsSeries = true;
 
@@ -702,7 +708,7 @@ public class LiveTvController : BaseJellyfinApiController
         [FromQuery] bool enableTotalRecordCount = true)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -741,7 +747,7 @@ public class LiveTvController : BaseJellyfinApiController
         [FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -949,9 +955,7 @@ public class LiveTvController : BaseJellyfinApiController
     [Authorize(Policy = Policies.LiveTvManagement)]
     [ProducesResponseType(StatusCodes.Status200OK)]
     public async Task<ActionResult<TunerHostInfo>> AddTunerHost([FromBody] TunerHostInfo tunerHostInfo)
-    {
-        return await _liveTvManager.SaveTunerHost(tunerHostInfo).ConfigureAwait(false);
-    }
+        => await _tunerHostManager.SaveTunerHost(tunerHostInfo).ConfigureAwait(false);
 
     /// <summary>
     /// Deletes a tuner host.
@@ -1128,10 +1132,8 @@ public class LiveTvController : BaseJellyfinApiController
     [HttpGet("TunerHosts/Types")]
     [Authorize(Policy = Policies.LiveTvAccess)]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    public ActionResult<IEnumerable<NameIdPair>> GetTunerHostTypes()
-    {
-        return _liveTvManager.GetTunerHostTypes();
-    }
+    public IEnumerable<NameIdPair> GetTunerHostTypes()
+        => _tunerHostManager.GetTunerHostTypes();
 
     /// <summary>
     /// Discover tuners.
@@ -1143,10 +1145,8 @@ public class LiveTvController : BaseJellyfinApiController
     [HttpGet("Tuners/Discover")]
     [Authorize(Policy = Policies.LiveTvManagement)]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    public async Task<ActionResult<IEnumerable<TunerHostInfo>>> DiscoverTuners([FromQuery] bool newDevicesOnly = false)
-    {
-        return await _liveTvManager.DiscoverTuners(newDevicesOnly, CancellationToken.None).ConfigureAwait(false);
-    }
+    public IAsyncEnumerable<TunerHostInfo> DiscoverTuners([FromQuery] bool newDevicesOnly = false)
+        => _tunerHostManager.DiscoverTuners(newDevicesOnly);
 
     /// <summary>
     /// Gets a live tv recording stream.
@@ -1171,7 +1171,7 @@ public class LiveTvController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var stream = new ProgressiveFileStream(path, null, _transcodingJobHelper);
+        var stream = new ProgressiveFileStream(path, null, _transcodeManager);
         return new FileStreamResult(stream, MimeTypes.GetMimeType(path));
     }
 
diff --git a/Jellyfin.Api/Controllers/MoviesController.cs b/Jellyfin.Api/Controllers/MoviesController.cs
index e1145481f..471bcd096 100644
--- a/Jellyfin.Api/Controllers/MoviesController.cs
+++ b/Jellyfin.Api/Controllers/MoviesController.cs
@@ -7,6 +7,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Dto;
@@ -69,7 +70,7 @@ public class MoviesController : BaseJellyfinApiController
         [FromQuery] int itemLimit = 8)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         var dtoOptions = new DtoOptions { Fields = fields }
diff --git a/Jellyfin.Api/Controllers/MusicGenresController.cs b/Jellyfin.Api/Controllers/MusicGenresController.cs
index 69b904264..5411baa3e 100644
--- a/Jellyfin.Api/Controllers/MusicGenresController.cs
+++ b/Jellyfin.Api/Controllers/MusicGenresController.cs
@@ -6,6 +6,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
@@ -95,7 +96,7 @@ public class MusicGenresController : BaseJellyfinApiController
             .AddClientFields(User)
             .AddAdditionalDtoOptions(enableImages, false, imageTypeLimit, enableImageTypes);
 
-        User? user = userId.Value.Equals(default)
+        User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -164,7 +165,7 @@ public class MusicGenresController : BaseJellyfinApiController
             return NotFound();
         }
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             var user = _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/PersonsController.cs b/Jellyfin.Api/Controllers/PersonsController.cs
index b4c6f490a..6ca308601 100644
--- a/Jellyfin.Api/Controllers/PersonsController.cs
+++ b/Jellyfin.Api/Controllers/PersonsController.cs
@@ -5,6 +5,7 @@ using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -83,7 +84,7 @@ public class PersonsController : BaseJellyfinApiController
             .AddClientFields(User)
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
-        User? user = userId.Value.Equals(default)
+        User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -129,7 +130,7 @@ public class PersonsController : BaseJellyfinApiController
             return NotFound();
         }
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             var user = _userManager.GetUserById(userId.Value);
             return _dtoService.GetBaseItemDto(item, dtoOptions, user);
diff --git a/Jellyfin.Api/Controllers/PlaylistsController.cs b/Jellyfin.Api/Controllers/PlaylistsController.cs
index c4c89ccde..921cc6031 100644
--- a/Jellyfin.Api/Controllers/PlaylistsController.cs
+++ b/Jellyfin.Api/Controllers/PlaylistsController.cs
@@ -9,6 +9,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Api.Models.PlaylistDtos;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Playlists;
@@ -188,7 +189,7 @@ public class PlaylistsController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var user = userId.Equals(default)
+        var user = userId.IsEmpty()
             ? null
             : _userManager.GetUserById(userId);
 
diff --git a/Jellyfin.Api/Controllers/PlaystateController.cs b/Jellyfin.Api/Controllers/PlaystateController.cs
index 8ad553bcb..bde2f4d1a 100644
--- a/Jellyfin.Api/Controllers/PlaystateController.cs
+++ b/Jellyfin.Api/Controllers/PlaystateController.cs
@@ -8,6 +8,7 @@ using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
+using MediaBrowser.Controller.MediaEncoding;
 using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Session;
@@ -30,7 +31,7 @@ public class PlaystateController : BaseJellyfinApiController
     private readonly ILibraryManager _libraryManager;
     private readonly ISessionManager _sessionManager;
     private readonly ILogger<PlaystateController> _logger;
-    private readonly TranscodingJobHelper _transcodingJobHelper;
+    private readonly ITranscodeManager _transcodeManager;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="PlaystateController"/> class.
@@ -40,14 +41,14 @@ public class PlaystateController : BaseJellyfinApiController
     /// <param name="libraryManager">Instance of the <see cref="ILibraryManager"/> interface.</param>
     /// <param name="sessionManager">Instance of the <see cref="ISessionManager"/> interface.</param>
     /// <param name="loggerFactory">Instance of the <see cref="ILoggerFactory"/> interface.</param>
-    /// <param name="transcodingJobHelper">Th <see cref="TranscodingJobHelper"/> singleton.</param>
+    /// <param name="transcodeManager">Instance of the <see cref="ITranscodeManager"/> interface.</param>
     public PlaystateController(
         IUserManager userManager,
         IUserDataManager userDataRepository,
         ILibraryManager libraryManager,
         ISessionManager sessionManager,
         ILoggerFactory loggerFactory,
-        TranscodingJobHelper transcodingJobHelper)
+        ITranscodeManager transcodeManager)
     {
         _userManager = userManager;
         _userDataRepository = userDataRepository;
@@ -55,7 +56,7 @@ public class PlaystateController : BaseJellyfinApiController
         _sessionManager = sessionManager;
         _logger = loggerFactory.CreateLogger<PlaystateController>();
 
-        _transcodingJobHelper = transcodingJobHelper;
+        _transcodeManager = transcodeManager;
     }
 
     /// <summary>
@@ -188,7 +189,7 @@ public class PlaystateController : BaseJellyfinApiController
     [ProducesResponseType(StatusCodes.Status204NoContent)]
     public ActionResult PingPlaybackSession([FromQuery, Required] string playSessionId)
     {
-        _transcodingJobHelper.PingTranscodingJob(playSessionId, null);
+        _transcodeManager.PingTranscodingJob(playSessionId, null);
         return NoContent();
     }
 
@@ -205,7 +206,7 @@ public class PlaystateController : BaseJellyfinApiController
         _logger.LogDebug("ReportPlaybackStopped PlaySessionId: {0}", playbackStopInfo.PlaySessionId ?? string.Empty);
         if (!string.IsNullOrWhiteSpace(playbackStopInfo.PlaySessionId))
         {
-            await _transcodingJobHelper.KillTranscodingJobs(User.GetDeviceId()!, playbackStopInfo.PlaySessionId, s => true).ConfigureAwait(false);
+            await _transcodeManager.KillTranscodingJobs(User.GetDeviceId()!, playbackStopInfo.PlaySessionId, s => true).ConfigureAwait(false);
         }
 
         playbackStopInfo.SessionId = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
@@ -354,7 +355,7 @@ public class PlaystateController : BaseJellyfinApiController
         _logger.LogDebug("ReportPlaybackStopped PlaySessionId: {0}", playbackStopInfo.PlaySessionId ?? string.Empty);
         if (!string.IsNullOrWhiteSpace(playbackStopInfo.PlaySessionId))
         {
-            await _transcodingJobHelper.KillTranscodingJobs(User.GetDeviceId()!, playbackStopInfo.PlaySessionId, s => true).ConfigureAwait(false);
+            await _transcodeManager.KillTranscodingJobs(User.GetDeviceId()!, playbackStopInfo.PlaySessionId, s => true).ConfigureAwait(false);
         }
 
         playbackStopInfo.SessionId = await RequestHelpers.GetSessionId(_sessionManager, _userManager, HttpContext).ConfigureAwait(false);
@@ -388,7 +389,7 @@ public class PlaystateController : BaseJellyfinApiController
     {
         if (method == PlayMethod.Transcode)
         {
-            var job = string.IsNullOrWhiteSpace(playSessionId) ? null : _transcodingJobHelper.GetTranscodingJob(playSessionId);
+            var job = string.IsNullOrWhiteSpace(playSessionId) ? null : _transcodeManager.GetTranscodingJob(playSessionId);
             if (job is null)
             {
                 return PlayMethod.DirectPlay;
diff --git a/Jellyfin.Api/Controllers/SearchController.cs b/Jellyfin.Api/Controllers/SearchController.cs
index 5b4594165..413b7b834 100644
--- a/Jellyfin.Api/Controllers/SearchController.cs
+++ b/Jellyfin.Api/Controllers/SearchController.cs
@@ -209,7 +209,7 @@ public class SearchController : BaseJellyfinApiController
                 break;
         }
 
-        if (!item.ChannelId.Equals(default))
+        if (!item.ChannelId.IsEmpty())
         {
             var channel = _libraryManager.GetItemById(item.ChannelId);
             result.ChannelName = channel?.Name;
diff --git a/Jellyfin.Api/Controllers/SessionController.cs b/Jellyfin.Api/Controllers/SessionController.cs
index fdebb3d45..52b58b8f1 100644
--- a/Jellyfin.Api/Controllers/SessionController.cs
+++ b/Jellyfin.Api/Controllers/SessionController.cs
@@ -10,6 +10,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Api.Models.SessionDtos;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Api;
 using MediaBrowser.Controller.Devices;
 using MediaBrowser.Controller.Library;
@@ -71,7 +72,7 @@ public class SessionController : BaseJellyfinApiController
             result = result.Where(i => string.Equals(i.DeviceId, deviceId, StringComparison.OrdinalIgnoreCase));
         }
 
-        if (controllableByUserId.HasValue && !controllableByUserId.Equals(default))
+        if (!controllableByUserId.IsNullOrEmpty())
         {
             result = result.Where(i => i.SupportsRemoteControl);
 
@@ -83,12 +84,12 @@ public class SessionController : BaseJellyfinApiController
 
             if (!user.HasPermission(PermissionKind.EnableRemoteControlOfOtherUsers))
             {
-                result = result.Where(i => i.UserId.Equals(default) || i.ContainsUser(controllableByUserId.Value));
+                result = result.Where(i => i.UserId.IsEmpty() || i.ContainsUser(controllableByUserId.Value));
             }
 
             if (!user.HasPermission(PermissionKind.EnableSharedDeviceControl))
             {
-                result = result.Where(i => !i.UserId.Equals(default));
+                result = result.Where(i => !i.UserId.IsEmpty());
             }
 
             result = result.Where(i =>
@@ -385,7 +386,6 @@ public class SessionController : BaseJellyfinApiController
     /// <param name="playableMediaTypes">A list of playable media types, comma delimited. Audio, Video, Book, Photo.</param>
     /// <param name="supportedCommands">A list of supported remote control commands, comma delimited.</param>
     /// <param name="supportsMediaControl">Determines whether media can be played remotely..</param>
-    /// <param name="supportsSync">Determines whether sync is supported.</param>
     /// <param name="supportsPersistentIdentifier">Determines whether the device supports a unique identifier.</param>
     /// <response code="204">Capabilities posted.</response>
     /// <returns>A <see cref="NoContentResult"/>.</returns>
@@ -397,7 +397,6 @@ public class SessionController : BaseJellyfinApiController
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] MediaType[] playableMediaTypes,
         [FromQuery, ModelBinder(typeof(CommaDelimitedArrayModelBinder))] GeneralCommandType[] supportedCommands,
         [FromQuery] bool supportsMediaControl = false,
-        [FromQuery] bool supportsSync = false,
         [FromQuery] bool supportsPersistentIdentifier = true)
     {
         if (string.IsNullOrWhiteSpace(id))
@@ -410,7 +409,6 @@ public class SessionController : BaseJellyfinApiController
             PlayableMediaTypes = playableMediaTypes,
             SupportedCommands = supportedCommands,
             SupportsMediaControl = supportsMediaControl,
-            SupportsSync = supportsSync,
             SupportsPersistentIdentifier = supportsPersistentIdentifier
         });
         return NoContent();
diff --git a/Jellyfin.Api/Controllers/StudiosController.cs b/Jellyfin.Api/Controllers/StudiosController.cs
index f434f60f5..708fc7436 100644
--- a/Jellyfin.Api/Controllers/StudiosController.cs
+++ b/Jellyfin.Api/Controllers/StudiosController.cs
@@ -5,6 +5,7 @@ using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -91,7 +92,7 @@ public class StudiosController : BaseJellyfinApiController
             .AddClientFields(User)
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
-        User? user = userId.Value.Equals(default)
+        User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -144,7 +145,7 @@ public class StudiosController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions().AddClientFields(User);
 
         var item = _libraryManager.GetStudio(name);
-        if (!userId.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             var user = _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/SuggestionsController.cs b/Jellyfin.Api/Controllers/SuggestionsController.cs
index 675757fc5..2aa6d25a7 100644
--- a/Jellyfin.Api/Controllers/SuggestionsController.cs
+++ b/Jellyfin.Api/Controllers/SuggestionsController.cs
@@ -3,6 +3,7 @@ using System.ComponentModel.DataAnnotations;
 using Jellyfin.Api.Extensions;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -62,7 +63,7 @@ public class SuggestionsController : BaseJellyfinApiController
         [FromQuery] int? limit,
         [FromQuery] bool enableTotalRecordCount = false)
     {
-        var user = userId.Equals(default)
+        var user = userId.IsEmpty()
             ? null
             : _userManager.GetUserById(userId);
 
diff --git a/Jellyfin.Api/Controllers/TvShowsController.cs b/Jellyfin.Api/Controllers/TvShowsController.cs
index 55a30d469..3d84b61bf 100644
--- a/Jellyfin.Api/Controllers/TvShowsController.cs
+++ b/Jellyfin.Api/Controllers/TvShowsController.cs
@@ -111,7 +111,7 @@ public class TvShowsController : BaseJellyfinApiController
             },
             options);
 
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -150,7 +150,7 @@ public class TvShowsController : BaseJellyfinApiController
         [FromQuery] bool? enableUserData)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -222,7 +222,7 @@ public class TvShowsController : BaseJellyfinApiController
         [FromQuery] ItemSortBy? sortBy)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
@@ -284,7 +284,7 @@ public class TvShowsController : BaseJellyfinApiController
         }
 
         // This must be the last filter
-        if (adjacentTo.HasValue && !adjacentTo.Value.Equals(default))
+        if (!adjacentTo.IsNullOrEmpty())
         {
             episodes = UserViewBuilder.FilterForAdjacency(episodes, adjacentTo.Value).ToList();
         }
@@ -339,7 +339,7 @@ public class TvShowsController : BaseJellyfinApiController
         [FromQuery] bool? enableUserData)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
diff --git a/Jellyfin.Api/Controllers/UniversalAudioController.cs b/Jellyfin.Api/Controllers/UniversalAudioController.cs
index 7177a0440..0a416aedb 100644
--- a/Jellyfin.Api/Controllers/UniversalAudioController.cs
+++ b/Jellyfin.Api/Controllers/UniversalAudioController.cs
@@ -11,6 +11,7 @@ using Jellyfin.Api.Models.StreamingDtos;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Streaming;
 using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.MediaInfo;
 using Microsoft.AspNetCore.Authorization;
diff --git a/Jellyfin.Api/Controllers/UserController.cs b/Jellyfin.Api/Controllers/UserController.cs
index f9f27f148..ea10ee24f 100644
--- a/Jellyfin.Api/Controllers/UserController.cs
+++ b/Jellyfin.Api/Controllers/UserController.cs
@@ -8,6 +8,7 @@ using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.Models.UserDtos;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Api;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Net;
@@ -532,7 +533,7 @@ public class UserController : BaseJellyfinApiController
     public ActionResult<UserDto> GetCurrentUser()
     {
         var userId = User.GetUserId();
-        if (userId.Equals(default))
+        if (userId.IsEmpty())
         {
             return BadRequest();
         }
diff --git a/Jellyfin.Api/Controllers/UserLibraryController.cs b/Jellyfin.Api/Controllers/UserLibraryController.cs
index 2c4fe9186..264e0a3db 100644
--- a/Jellyfin.Api/Controllers/UserLibraryController.cs
+++ b/Jellyfin.Api/Controllers/UserLibraryController.cs
@@ -8,6 +8,7 @@ using Jellyfin.Api.Extensions;
 using Jellyfin.Api.ModelBinders;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
@@ -84,7 +85,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -145,7 +146,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -185,7 +186,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -221,7 +222,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -257,7 +258,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -294,7 +295,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -330,7 +331,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -375,7 +376,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
@@ -558,7 +559,7 @@ public class UserLibraryController : BaseJellyfinApiController
             return NotFound();
         }
 
-        var item = itemId.Equals(default)
+        var item = itemId.IsEmpty()
             ? _libraryManager.GetUserRootFolder()
             : _libraryManager.GetItemById(itemId);
 
diff --git a/Jellyfin.Api/Controllers/UserViewsController.cs b/Jellyfin.Api/Controllers/UserViewsController.cs
index 0ffa3ab1a..035d04474 100644
--- a/Jellyfin.Api/Controllers/UserViewsController.cs
+++ b/Jellyfin.Api/Controllers/UserViewsController.cs
@@ -90,7 +90,6 @@ public class UserViewsController : BaseJellyfinApiController
 
         fields.Add(ItemFields.PrimaryImageAspectRatio);
         fields.Add(ItemFields.DisplayPreferencesId);
-        fields.Remove(ItemFields.BasicSyncInfo);
         dtoOptions.Fields = fields.ToArray();
 
         var user = _userManager.GetUserById(userId);
diff --git a/Jellyfin.Api/Controllers/VideosController.cs b/Jellyfin.Api/Controllers/VideosController.cs
index 5d9868eb9..e6c319869 100644
--- a/Jellyfin.Api/Controllers/VideosController.cs
+++ b/Jellyfin.Api/Controllers/VideosController.cs
@@ -11,7 +11,7 @@ using Jellyfin.Api.Constants;
 using Jellyfin.Api.Extensions;
 using Jellyfin.Api.Helpers;
 using Jellyfin.Api.ModelBinders;
-using Jellyfin.Api.Models.StreamingDtos;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Api;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Net;
@@ -20,6 +20,7 @@ using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Controller.Streaming;
 using MediaBrowser.Model.Dlna;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
@@ -43,7 +44,7 @@ public class VideosController : BaseJellyfinApiController
     private readonly IMediaSourceManager _mediaSourceManager;
     private readonly IServerConfigurationManager _serverConfigurationManager;
     private readonly IMediaEncoder _mediaEncoder;
-    private readonly TranscodingJobHelper _transcodingJobHelper;
+    private readonly ITranscodeManager _transcodeManager;
     private readonly IHttpClientFactory _httpClientFactory;
     private readonly EncodingHelper _encodingHelper;
 
@@ -58,7 +59,7 @@ public class VideosController : BaseJellyfinApiController
     /// <param name="mediaSourceManager">Instance of the <see cref="IMediaSourceManager"/> interface.</param>
     /// <param name="serverConfigurationManager">Instance of the <see cref="IServerConfigurationManager"/> interface.</param>
     /// <param name="mediaEncoder">Instance of the <see cref="IMediaEncoder"/> interface.</param>
-    /// <param name="transcodingJobHelper">Instance of the <see cref="TranscodingJobHelper"/> class.</param>
+    /// <param name="transcodeManager">Instance of the <see cref="ITranscodeManager"/> interface.</param>
     /// <param name="httpClientFactory">Instance of the <see cref="IHttpClientFactory"/> interface.</param>
     /// <param name="encodingHelper">Instance of <see cref="EncodingHelper"/>.</param>
     public VideosController(
@@ -68,7 +69,7 @@ public class VideosController : BaseJellyfinApiController
         IMediaSourceManager mediaSourceManager,
         IServerConfigurationManager serverConfigurationManager,
         IMediaEncoder mediaEncoder,
-        TranscodingJobHelper transcodingJobHelper,
+        ITranscodeManager transcodeManager,
         IHttpClientFactory httpClientFactory,
         EncodingHelper encodingHelper)
     {
@@ -78,7 +79,7 @@ public class VideosController : BaseJellyfinApiController
         _mediaSourceManager = mediaSourceManager;
         _serverConfigurationManager = serverConfigurationManager;
         _mediaEncoder = mediaEncoder;
-        _transcodingJobHelper = transcodingJobHelper;
+        _transcodeManager = transcodeManager;
         _httpClientFactory = httpClientFactory;
         _encodingHelper = encodingHelper;
     }
@@ -96,12 +97,12 @@ public class VideosController : BaseJellyfinApiController
     public ActionResult<QueryResult<BaseItemDto>> GetAdditionalPart([FromRoute, Required] Guid itemId, [FromQuery] Guid? userId)
     {
         userId = RequestHelpers.GetUserId(User, userId);
-        var user = userId.Value.Equals(default)
+        var user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
 
-        var item = itemId.Equals(default)
-            ? (userId.Value.Equals(default)
+        var item = itemId.IsEmpty()
+            ? (userId.IsNullOrEmpty()
                 ? _libraryManager.RootFolder
                 : _libraryManager.GetUserRootFolder())
             : _libraryManager.GetItemById(itemId);
@@ -427,7 +428,7 @@ public class VideosController : BaseJellyfinApiController
                 _serverConfigurationManager,
                 _mediaEncoder,
                 _encodingHelper,
-                _transcodingJobHelper,
+                _transcodeManager,
                 _transcodingJobType,
                 cancellationTokenSource.Token)
             .ConfigureAwait(false);
@@ -466,7 +467,7 @@ public class VideosController : BaseJellyfinApiController
 
             if (state.MediaSource.IsInfiniteStream)
             {
-                var liveStream = new ProgressiveFileStream(state.MediaPath, null, _transcodingJobHelper);
+                var liveStream = new ProgressiveFileStream(state.MediaPath, null, _transcodeManager);
                 return File(liveStream, contentType);
             }
 
@@ -482,7 +483,7 @@ public class VideosController : BaseJellyfinApiController
             state,
             isHeadRequest,
             HttpContext,
-            _transcodingJobHelper,
+            _transcodeManager,
             ffmpegCommandLineArguments,
             _transcodingJobType,
             cancellationTokenSource).ConfigureAwait(false);
diff --git a/Jellyfin.Api/Controllers/YearsController.cs b/Jellyfin.Api/Controllers/YearsController.cs
index ca46c38c5..e4aa0ea42 100644
--- a/Jellyfin.Api/Controllers/YearsController.cs
+++ b/Jellyfin.Api/Controllers/YearsController.cs
@@ -90,7 +90,7 @@ public class YearsController : BaseJellyfinApiController
             .AddClientFields(User)
             .AddAdditionalDtoOptions(enableImages, enableUserData, imageTypeLimit, enableImageTypes);
 
-        User? user = userId.Value.Equals(default)
+        User? user = userId.IsNullOrEmpty()
             ? null
             : _userManager.GetUserById(userId.Value);
         BaseItem parentItem = _libraryManager.GetParentItem(parentId, userId);
@@ -110,7 +110,7 @@ public class YearsController : BaseJellyfinApiController
         {
             var folder = (Folder)parentItem;
 
-            if (userId.Equals(default))
+            if (userId.IsNullOrEmpty())
             {
                 items = recursive ? folder.GetRecursiveChildren(Filter) : folder.Children.Where(Filter).ToList();
             }
@@ -182,7 +182,7 @@ public class YearsController : BaseJellyfinApiController
         var dtoOptions = new DtoOptions()
             .AddClientFields(User);
 
-        if (!userId.Value.Equals(default))
+        if (!userId.IsNullOrEmpty())
         {
             var user = _userManager.GetUserById(userId.Value);
             return _dtoService.GetBaseItemDto(item, dtoOptions, user);