Merge branch 'master' into unharden-for-lxc

54 files changed, 639 insertions, 629 deletions

diff --git a/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs b/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
index d38535634..5ba4749a6 100644
--- a/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
+++ b/Emby.Server.Implementations/AppBase/BaseConfigurationManager.cs
@@ -301,7 +301,7 @@ namespace Emby.Server.Implementations.AppBase
         {
             return _configurations.GetOrAdd(
                 key,
-                (k, configurationManager) =>
+                static (k, configurationManager) =>
                 {
                     var file = configurationManager.GetConfigurationFile(k);
 
diff --git a/Emby.Server.Implementations/AppBase/ConfigurationHelper.cs b/Emby.Server.Implementations/AppBase/ConfigurationHelper.cs
index 3a916e5c0..f923e59ef 100644
--- a/Emby.Server.Implementations/AppBase/ConfigurationHelper.cs
+++ b/Emby.Server.Implementations/AppBase/ConfigurationHelper.cs
@@ -1,6 +1,5 @@
 using System;
 using System.IO;
-using System.Linq;
 using MediaBrowser.Model.Serialization;
 
 namespace Emby.Server.Implementations.AppBase
diff --git a/Emby.Server.Implementations/Archiving/ZipClient.cs b/Emby.Server.Implementations/Archiving/ZipClient.cs
index 9e1d550eb..6a3b250d2 100644
--- a/Emby.Server.Implementations/Archiving/ZipClient.cs
+++ b/Emby.Server.Implementations/Archiving/ZipClient.cs
@@ -1,11 +1,8 @@
 using System.IO;
 using MediaBrowser.Model.IO;
-using SharpCompress.Archives.SevenZip;
-using SharpCompress.Archives.Tar;
 using SharpCompress.Common;
 using SharpCompress.Readers;
 using SharpCompress.Readers.GZip;
-using SharpCompress.Readers.Zip;
 
 namespace Emby.Server.Implementations.Archiving
 {
@@ -14,55 +11,6 @@ namespace Emby.Server.Implementations.Archiving
     /// </summary>
     public class ZipClient : IZipClient
     {
-        /// <summary>
-        /// Extracts all.
-        /// </summary>
-        /// <param name="sourceFile">The source file.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAll(string sourceFile, string targetPath, bool overwriteExistingFiles)
-        {
-            using var fileStream = File.OpenRead(sourceFile);
-            ExtractAll(fileStream, targetPath, overwriteExistingFiles);
-        }
-
-        /// <summary>
-        /// Extracts all.
-        /// </summary>
-        /// <param name="source">The source.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAll(Stream source, string targetPath, bool overwriteExistingFiles)
-        {
-            using var reader = ReaderFactory.Open(source);
-            var options = new ExtractionOptions
-            {
-                ExtractFullPath = true
-            };
-
-            if (overwriteExistingFiles)
-            {
-                options.Overwrite = true;
-            }
-
-            Directory.CreateDirectory(targetPath);
-            reader.WriteAllToDirectory(targetPath, options);
-        }
-
-        /// <inheritdoc />
-        public void ExtractAllFromZip(Stream source, string targetPath, bool overwriteExistingFiles)
-        {
-            using var reader = ZipReader.Open(source);
-            var options = new ExtractionOptions
-            {
-                ExtractFullPath = true,
-                Overwrite = overwriteExistingFiles
-            };
-
-            Directory.CreateDirectory(targetPath);
-            reader.WriteAllToDirectory(targetPath, options);
-        }
-
         /// <inheritdoc />
         public void ExtractAllFromGz(Stream source, string targetPath, bool overwriteExistingFiles)
         {
@@ -94,69 +42,5 @@ namespace Emby.Server.Implementations.Archiving
                 reader.WriteEntryToFile(Path.Combine(targetPath, filename));
             }
         }
-
-        /// <summary>
-        /// Extracts all from7z.
-        /// </summary>
-        /// <param name="sourceFile">The source file.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAllFrom7z(string sourceFile, string targetPath, bool overwriteExistingFiles)
-        {
-            using var fileStream = File.OpenRead(sourceFile);
-            ExtractAllFrom7z(fileStream, targetPath, overwriteExistingFiles);
-        }
-
-        /// <summary>
-        /// Extracts all from7z.
-        /// </summary>
-        /// <param name="source">The source.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAllFrom7z(Stream source, string targetPath, bool overwriteExistingFiles)
-        {
-            using var archive = SevenZipArchive.Open(source);
-            using var reader = archive.ExtractAllEntries();
-            var options = new ExtractionOptions
-            {
-                ExtractFullPath = true,
-                Overwrite = overwriteExistingFiles
-            };
-
-            Directory.CreateDirectory(targetPath);
-            reader.WriteAllToDirectory(targetPath, options);
-        }
-
-        /// <summary>
-        /// Extracts all from tar.
-        /// </summary>
-        /// <param name="sourceFile">The source file.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAllFromTar(string sourceFile, string targetPath, bool overwriteExistingFiles)
-        {
-            using var fileStream = File.OpenRead(sourceFile);
-            ExtractAllFromTar(fileStream, targetPath, overwriteExistingFiles);
-        }
-
-        /// <summary>
-        /// Extracts all from tar.
-        /// </summary>
-        /// <param name="source">The source.</param>
-        /// <param name="targetPath">The target path.</param>
-        /// <param name="overwriteExistingFiles">if set to <c>true</c> [overwrite existing files].</param>
-        public void ExtractAllFromTar(Stream source, string targetPath, bool overwriteExistingFiles)
-        {
-            using var archive = TarArchive.Open(source);
-            using var reader = archive.ExtractAllEntries();
-            var options = new ExtractionOptions
-            {
-                ExtractFullPath = true,
-                Overwrite = overwriteExistingFiles
-            };
-
-            Directory.CreateDirectory(targetPath);
-            reader.WriteAllToDirectory(targetPath, options);
-        }
     }
 }
diff --git a/Emby.Server.Implementations/Channels/ChannelManager.cs b/Emby.Server.Implementations/Channels/ChannelManager.cs
index f65eaec1c..8702691d1 100644
--- a/Emby.Server.Implementations/Channels/ChannelManager.cs
+++ b/Emby.Server.Implementations/Channels/ChannelManager.cs
@@ -10,6 +10,7 @@ using System.Threading;
 using System.Threading.Tasks;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using Jellyfin.Extensions.Json;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Progress;
@@ -179,7 +180,7 @@ namespace Emby.Server.Implementations.Channels
                     try
                     {
                         return (GetChannelProvider(i) is IHasFolderAttributes hasAttributes
-                            && hasAttributes.Attributes.Contains("Recordings", StringComparer.OrdinalIgnoreCase)) == val;
+                            && hasAttributes.Attributes.Contains("Recordings", StringComparison.OrdinalIgnoreCase)) == val;
                     }
                     catch
                     {
@@ -541,7 +542,7 @@ namespace Emby.Server.Implementations.Channels
             return _libraryManager.GetItemIds(
                 new InternalItemsQuery
                 {
-                    IncludeItemTypes = new[] { nameof(Channel) },
+                    IncludeItemTypes = new[] { BaseItemKind.Channel },
                     OrderBy = new[] { (ItemSortBy.SortName, SortOrder.Ascending) }
                 }).Select(i => GetChannelFeatures(i)).ToArray();
         }
@@ -1135,7 +1136,7 @@ namespace Emby.Server.Implementations.Channels
 
             if (!info.IsLiveStream)
             {
-                if (item.Tags.Contains("livestream", StringComparer.OrdinalIgnoreCase))
+                if (item.Tags.Contains("livestream", StringComparison.OrdinalIgnoreCase))
                 {
                     item.Tags = item.Tags.Except(new[] { "livestream" }, StringComparer.OrdinalIgnoreCase).ToArray();
                     _logger.LogDebug("Forcing update due to Tags {0}", item.Name);
@@ -1144,7 +1145,7 @@ namespace Emby.Server.Implementations.Channels
             }
             else
             {
-                if (!item.Tags.Contains("livestream", StringComparer.OrdinalIgnoreCase))
+                if (!item.Tags.Contains("livestream", StringComparison.OrdinalIgnoreCase))
                 {
                     item.Tags = item.Tags.Concat(new[] { "livestream" }).ToArray();
                     _logger.LogDebug("Forcing update due to Tags {0}", item.Name);
diff --git a/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs b/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
index 2391eed42..b358ba4d5 100644
--- a/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
+++ b/Emby.Server.Implementations/Channels/ChannelPostScanTask.cs
@@ -2,6 +2,7 @@ using System;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Channels;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -51,7 +52,7 @@ namespace Emby.Server.Implementations.Channels
 
             var uninstalledChannels = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { nameof(Channel) },
+                IncludeItemTypes = new[] { BaseItemKind.Channel },
                 ExcludeItemIds = installedChannelIds.ToArray()
             });
 
diff --git a/Emby.Server.Implementations/Data/BaseSqliteRepository.cs b/Emby.Server.Implementations/Data/BaseSqliteRepository.cs
index 73c31f49d..5030cbacb 100644
--- a/Emby.Server.Implementations/Data/BaseSqliteRepository.cs
+++ b/Emby.Server.Implementations/Data/BaseSqliteRepository.cs
@@ -4,8 +4,8 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
+using Jellyfin.Extensions;
 using Microsoft.Extensions.Logging;
 using SQLitePCL.pretty;
 
@@ -194,7 +194,7 @@ namespace Emby.Server.Implementations.Data
 
         protected void AddColumn(IDatabaseConnection connection, string table, string columnName, string type, List<string> existingColumnNames)
         {
-            if (existingColumnNames.Contains(columnName, StringComparer.OrdinalIgnoreCase))
+            if (existingColumnNames.Contains(columnName, StringComparison.OrdinalIgnoreCase))
             {
                 return;
             }
diff --git a/Emby.Server.Implementations/Data/SqliteItemRepository.cs b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
index 13f1df7c8..beae7e243 100644
--- a/Emby.Server.Implementations/Data/SqliteItemRepository.cs
+++ b/Emby.Server.Implementations/Data/SqliteItemRepository.cs
@@ -62,7 +62,7 @@ namespace Emby.Server.Implementations.Data
 
         private readonly ItemFields[] _allItemFields = Enum.GetValues<ItemFields>();
 
-        private static readonly string[] _retriveItemColumns =
+        private static readonly string[] _retrieveItemColumns =
         {
             "type",
             "data",
@@ -133,7 +133,7 @@ namespace Emby.Server.Implementations.Data
             "OwnerId"
         };
 
-        private static readonly string _retriveItemColumnsSelectQuery = $"select {string.Join(',', _retriveItemColumns)} from TypedBaseItems where guid = @guid";
+        private static readonly string _retrieveItemColumnsSelectQuery = $"select {string.Join(',', _retrieveItemColumns)} from TypedBaseItems where guid = @guid";
 
         private static readonly string[] _mediaStreamSaveColumns =
         {
@@ -196,57 +196,56 @@ namespace Emby.Server.Implementations.Data
 
         private static readonly string _mediaAttachmentInsertPrefix;
 
-        private static readonly HashSet<string> _programTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _programTypes = new[]
         {
-            "Program",
-            "TvChannel",
-            "LiveTvProgram",
-            "LiveTvTvChannel"
+            BaseItemKind.Program,
+            BaseItemKind.TvChannel,
+            BaseItemKind.LiveTvProgram,
+            BaseItemKind.LiveTvChannel
         };
 
-        private static readonly HashSet<string> _programExcludeParentTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _programExcludeParentTypes = new[]
         {
-            "Series",
-            "Season",
-            "MusicAlbum",
-            "MusicArtist",
-            "PhotoAlbum"
+            BaseItemKind.Series,
+            BaseItemKind.Season,
+            BaseItemKind.MusicAlbum,
+            BaseItemKind.MusicArtist,
+            BaseItemKind.PhotoAlbum
         };
 
-        private static readonly HashSet<string> _serviceTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _serviceTypes = new[]
         {
-            "TvChannel",
-            "LiveTvTvChannel"
+            BaseItemKind.TvChannel,
+            BaseItemKind.LiveTvChannel
         };
 
-        private static readonly HashSet<string> _startDateTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _startDateTypes = new[]
         {
-            "Program",
-            "LiveTvProgram"
+            BaseItemKind.Program,
+            BaseItemKind.LiveTvProgram
         };
 
-        private static readonly HashSet<string> _seriesTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _seriesTypes = new[]
         {
-            "Book",
-            "AudioBook",
-            "Episode",
-            "Season"
+            BaseItemKind.Book,
+            BaseItemKind.AudioBook,
+            BaseItemKind.Episode,
+            BaseItemKind.Season
         };
 
-        private static readonly HashSet<string> _artistExcludeParentTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _artistExcludeParentTypes = new[]
         {
-            "Series",
-            "Season",
-            "PhotoAlbum"
+            BaseItemKind.Series,
+            BaseItemKind.Season,
+            BaseItemKind.PhotoAlbum
         };
 
-        private static readonly HashSet<string> _artistsTypes = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
+        private static readonly BaseItemKind[] _artistsTypes = new[]
         {
-            "Audio",
-            "MusicAlbum",
-            "MusicVideo",
-            "AudioBook",
-            "AudioPodcast"
+            BaseItemKind.Audio,
+            BaseItemKind.MusicAlbum,
+            BaseItemKind.MusicVideo,
+            BaseItemKind.AudioBook
         };
 
         private static readonly Type[] _knownTypes =
@@ -285,6 +284,43 @@ namespace Emby.Server.Implementations.Data
 
         private readonly Dictionary<string, string> _types = GetTypeMapDictionary();
 
+        private static readonly Dictionary<BaseItemKind, string> _baseItemKindNames = new()
+        {
+            { BaseItemKind.AggregateFolder, typeof(AggregateFolder).FullName },
+            { BaseItemKind.Audio, typeof(Audio).FullName },
+            { BaseItemKind.AudioBook, typeof(AudioBook).FullName },
+            { BaseItemKind.BasePluginFolder, typeof(BasePluginFolder).FullName },
+            { BaseItemKind.Book, typeof(Book).FullName },
+            { BaseItemKind.BoxSet, typeof(BoxSet).FullName },
+            { BaseItemKind.Channel, typeof(Channel).FullName },
+            { BaseItemKind.CollectionFolder, typeof(CollectionFolder).FullName },
+            { BaseItemKind.Episode, typeof(Episode).FullName },
+            { BaseItemKind.Folder, typeof(Folder).FullName },
+            { BaseItemKind.Genre, typeof(Genre).FullName },
+            { BaseItemKind.Movie, typeof(Movie).FullName },
+            { BaseItemKind.LiveTvChannel, typeof(LiveTvChannel).FullName },
+            { BaseItemKind.LiveTvProgram, typeof(LiveTvProgram).FullName },
+            { BaseItemKind.MusicAlbum, typeof(MusicAlbum).FullName },
+            { BaseItemKind.MusicArtist, typeof(MusicArtist).FullName },
+            { BaseItemKind.MusicGenre, typeof(MusicGenre).FullName },
+            { BaseItemKind.MusicVideo, typeof(MusicVideo).FullName },
+            { BaseItemKind.Person, typeof(Person).FullName },
+            { BaseItemKind.Photo, typeof(Photo).FullName },
+            { BaseItemKind.PhotoAlbum, typeof(PhotoAlbum).FullName },
+            { BaseItemKind.Playlist, typeof(Playlist).FullName },
+            { BaseItemKind.PlaylistsFolder, typeof(PlaylistsFolder).FullName },
+            { BaseItemKind.Season, typeof(Season).FullName },
+            { BaseItemKind.Series, typeof(Series).FullName },
+            { BaseItemKind.Studio, typeof(Studio).FullName },
+            { BaseItemKind.Trailer, typeof(Trailer).FullName },
+            { BaseItemKind.TvChannel, typeof(LiveTvChannel).FullName },
+            { BaseItemKind.TvProgram, typeof(LiveTvProgram).FullName },
+            { BaseItemKind.UserRootFolder, typeof(UserRootFolder).FullName },
+            { BaseItemKind.UserView, typeof(UserView).FullName },
+            { BaseItemKind.Video, typeof(Video).FullName },
+            { BaseItemKind.Year, typeof(Year).FullName }
+        };
+
         static SqliteItemRepository()
         {
             var queryPrefixText = new StringBuilder();
@@ -1320,7 +1356,7 @@ namespace Emby.Server.Implementations.Data
 
             using (var connection = GetConnection(true))
             {
-                using (var statement = PrepareStatement(connection, _retriveItemColumnsSelectQuery))
+                using (var statement = PrepareStatement(connection, _retrieveItemColumnsSelectQuery))
                 {
                     statement.TryBind("@guid", id);
 
@@ -2212,7 +2248,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasProgramAttributes(InternalItemsQuery query)
         {
-            if (_programExcludeParentTypes.Contains(query.ParentType))
+            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2227,7 +2263,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasServiceName(InternalItemsQuery query)
         {
-            if (_programExcludeParentTypes.Contains(query.ParentType))
+            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2242,7 +2278,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasStartDate(InternalItemsQuery query)
         {
-            if (_programExcludeParentTypes.Contains(query.ParentType))
+            if (query.ParentType != null && _programExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2262,7 +2298,7 @@ namespace Emby.Server.Implementations.Data
                 return true;
             }
 
-            return query.IncludeItemTypes.Contains("Episode", StringComparer.OrdinalIgnoreCase);
+            return query.IncludeItemTypes.Contains(BaseItemKind.Episode);
         }
 
         private bool HasTrailerTypes(InternalItemsQuery query)
@@ -2272,12 +2308,12 @@ namespace Emby.Server.Implementations.Data
                 return true;
             }
 
-            return query.IncludeItemTypes.Contains("Trailer", StringComparer.OrdinalIgnoreCase);
+            return query.IncludeItemTypes.Contains(BaseItemKind.Trailer);
         }
 
         private bool HasArtistFields(InternalItemsQuery query)
         {
-            if (_artistExcludeParentTypes.Contains(query.ParentType))
+            if (query.ParentType != null && _artistExcludeParentTypes.Contains(query.ParentType.Value))
             {
                 return false;
             }
@@ -2292,7 +2328,7 @@ namespace Emby.Server.Implementations.Data
 
         private bool HasSeriesFields(InternalItemsQuery query)
         {
-            if (string.Equals(query.ParentType, "PhotoAlbum", StringComparison.OrdinalIgnoreCase))
+            if (query.ParentType == BaseItemKind.PhotoAlbum)
             {
                 return false;
             }
@@ -2630,7 +2666,7 @@ namespace Emby.Server.Implementations.Data
                 query.Limit = query.Limit.Value + 4;
             }
 
-            var columns = _retriveItemColumns.ToList();
+            var columns = _retrieveItemColumns.ToList();
             SetFinalColumnsToSelect(query, columns);
             var commandTextBuilder = new StringBuilder("select ", 1024)
                 .AppendJoin(',', columns)
@@ -2821,7 +2857,7 @@ namespace Emby.Server.Implementations.Data
                 query.Limit = query.Limit.Value + 4;
             }
 
-            var columns = _retriveItemColumns.ToList();
+            var columns = _retrieveItemColumns.ToList();
             SetFinalColumnsToSelect(query, columns);
             var commandTextBuilder = new StringBuilder("select ", 512)
                 .AppendJoin(',', columns)
@@ -3487,8 +3523,8 @@ namespace Emby.Server.Implementations.Data
             if (query.IsMovie == true)
             {
                 if (query.IncludeItemTypes.Length == 0
-                    || query.IncludeItemTypes.Contains(nameof(Movie))
-                    || query.IncludeItemTypes.Contains(nameof(Trailer)))
+                    || query.IncludeItemTypes.Contains(BaseItemKind.Movie)
+                    || query.IncludeItemTypes.Contains(BaseItemKind.Trailer))
                 {
                     whereClauses.Add("(IsMovie is null OR IsMovie=@IsMovie)");
                 }
@@ -3563,31 +3599,81 @@ namespace Emby.Server.Implementations.Data
                 statement?.TryBind("@IsFolder", query.IsFolder);
             }
 
-            var includeTypes = query.IncludeItemTypes.Select(MapIncludeItemTypes).Where(x => x != null).ToArray();
+            var includeTypes = query.IncludeItemTypes;
             // Only specify excluded types if no included types are specified
-            if (includeTypes.Length == 0)
+            if (query.IncludeItemTypes.Length == 0)
             {
-                var excludeTypes = query.ExcludeItemTypes.Select(MapIncludeItemTypes).Where(x => x != null).ToArray();
+                var excludeTypes = query.ExcludeItemTypes;
                 if (excludeTypes.Length == 1)
                 {
-                    whereClauses.Add("type<>@type");
-                    statement?.TryBind("@type", excludeTypes[0]);
+                    if (_baseItemKindNames.TryGetValue(excludeTypes[0], out var excludeTypeName))
+                    {
+                        whereClauses.Add("type<>@type");
+                        statement?.TryBind("@type", excludeTypeName);
+                    }
+                    else
+                    {
+                        Logger.LogWarning("Undefined BaseItemKind to Type mapping: {BaseItemKind}", excludeTypes[0]);
+                    }
                 }
                 else if (excludeTypes.Length > 1)
                 {
-                    var inClause = string.Join(',', excludeTypes.Select(i => "'" + i + "'"));
-                    whereClauses.Add($"type not in ({inClause})");
+                    var whereBuilder = new StringBuilder("type not in (");
+                    foreach (var excludeType in excludeTypes)
+                    {
+                        if (_baseItemKindNames.TryGetValue(excludeType, out var baseItemKindName))
+                        {
+                            whereBuilder
+                                .Append('\'')
+                                .Append(baseItemKindName)
+                                .Append("',");
+                        }
+                        else
+                        {
+                            Logger.LogWarning("Undefined BaseItemKind to Type mapping: {BaseItemKind}", excludeType);
+                        }
+                    }
+
+                    // Remove trailing comma.
+                    whereBuilder.Length--;
+                    whereBuilder.Append(')');
+                    whereClauses.Add(whereBuilder.ToString());
                 }
             }
             else if (includeTypes.Length == 1)
             {
-                whereClauses.Add("type=@type");
-                statement?.TryBind("@type", includeTypes[0]);
+                if (_baseItemKindNames.TryGetValue(includeTypes[0], out var includeTypeName))
+                {
+                    whereClauses.Add("type=@type");
+                    statement?.TryBind("@type", includeTypeName);
+                }
+                else
+                {
+                    Logger.LogWarning("Undefined BaseItemKind to Type mapping: {BaseItemKind}", includeTypes[0]);
+                }
             }
             else if (includeTypes.Length > 1)
             {
-                var inClause = string.Join(',', includeTypes.Select(i => "'" + i + "'"));
-                whereClauses.Add($"type in ({inClause})");
+                var whereBuilder = new StringBuilder("type in (");
+                foreach (var includeType in includeTypes)
+                {
+                    if (_baseItemKindNames.TryGetValue(includeType, out var baseItemKindName))
+                    {
+                        whereBuilder
+                            .Append('\'')
+                            .Append(baseItemKindName)
+                            .Append("',");
+                    }
+                    else
+                    {
+                        Logger.LogWarning("Undefined BaseItemKind to Type mapping: {BaseItemKind}", includeType);
+                    }
+                }
+
+                // Remove trailing comma.
+                whereBuilder.Length--;
+                whereBuilder.Append(')');
+                whereClauses.Add(whereBuilder.ToString());
             }
 
             if (query.ChannelIds.Count == 1)
@@ -3911,7 +3997,7 @@ namespace Emby.Server.Implementations.Data
                 if (query.IsPlayed.HasValue)
                 {
                     // We should probably figure this out for all folders, but for right now, this is the only place where we need it
-                    if (query.IncludeItemTypes.Length == 1 && string.Equals(query.IncludeItemTypes[0], nameof(Series), StringComparison.OrdinalIgnoreCase))
+                    if (query.IncludeItemTypes.Length == 1 && query.IncludeItemTypes[0] == BaseItemKind.Series)
                     {
                         if (query.IsPlayed.Value)
                         {
@@ -4761,27 +4847,27 @@ namespace Emby.Server.Implementations.Data
         {
             var list = new List<string>();
 
-            if (IsTypeInQuery(nameof(Person), query))
+            if (IsTypeInQuery(BaseItemKind.Person, query))
             {
                 list.Add(typeof(Person).FullName);
             }
 
-            if (IsTypeInQuery(nameof(Genre), query))
+            if (IsTypeInQuery(BaseItemKind.Genre, query))
             {
                 list.Add(typeof(Genre).FullName);
             }
 
-            if (IsTypeInQuery(nameof(MusicGenre), query))
+            if (IsTypeInQuery(BaseItemKind.MusicGenre, query))
             {
                 list.Add(typeof(MusicGenre).FullName);
             }
 
-            if (IsTypeInQuery(nameof(MusicArtist), query))
+            if (IsTypeInQuery(BaseItemKind.MusicArtist, query))
             {
                 list.Add(typeof(MusicArtist).FullName);
             }
 
-            if (IsTypeInQuery(nameof(Studio), query))
+            if (IsTypeInQuery(BaseItemKind.Studio, query))
             {
                 list.Add(typeof(Studio).FullName);
             }
@@ -4789,14 +4875,14 @@ namespace Emby.Server.Implementations.Data
             return list;
         }
 
-        private bool IsTypeInQuery(string type, InternalItemsQuery query)
+        private bool IsTypeInQuery(BaseItemKind type, InternalItemsQuery query)
         {
-            if (query.ExcludeItemTypes.Contains(type, StringComparer.OrdinalIgnoreCase))
+            if (query.ExcludeItemTypes.Contains(type))
             {
                 return false;
             }
 
-            return query.IncludeItemTypes.Length == 0 || query.IncludeItemTypes.Contains(type, StringComparer.OrdinalIgnoreCase);
+            return query.IncludeItemTypes.Length == 0 || query.IncludeItemTypes.Contains(type);
         }
 
         private string GetCleanValue(string value)
@@ -4836,12 +4922,12 @@ namespace Emby.Server.Implementations.Data
                 return true;
             }
 
-            if (query.IncludeItemTypes.Contains(nameof(Episode), StringComparer.OrdinalIgnoreCase)
-                || query.IncludeItemTypes.Contains(nameof(Video), StringComparer.OrdinalIgnoreCase)
-                || query.IncludeItemTypes.Contains(nameof(Movie), StringComparer.OrdinalIgnoreCase)
-                || query.IncludeItemTypes.Contains(nameof(MusicVideo), StringComparer.OrdinalIgnoreCase)
-                || query.IncludeItemTypes.Contains(nameof(Series), StringComparer.OrdinalIgnoreCase)
-                || query.IncludeItemTypes.Contains(nameof(Season), StringComparer.OrdinalIgnoreCase))
+            if (query.IncludeItemTypes.Contains(BaseItemKind.Episode)
+                || query.IncludeItemTypes.Contains(BaseItemKind.Video)
+                || query.IncludeItemTypes.Contains(BaseItemKind.Movie)
+                || query.IncludeItemTypes.Contains(BaseItemKind.MusicVideo)
+                || query.IncludeItemTypes.Contains(BaseItemKind.Series)
+                || query.IncludeItemTypes.Contains(BaseItemKind.Season))
             {
                 return true;
             }
@@ -4890,22 +4976,6 @@ where AncestorIdText not null and ItemValues.Value not null and ItemValues.Type
             return dict;
         }
 
-        private string MapIncludeItemTypes(string value)
-        {
-            if (_types.TryGetValue(value, out string result))
-            {
-                return result;
-            }
-
-            if (IsValidType(value))
-            {
-                return value;
-            }
-
-            Logger.LogWarning("Unknown item type: {ItemType}", value);
-            return null;
-        }
-
         public void DeleteItem(Guid id)
         {
             if (id == Guid.Empty)
@@ -5351,7 +5421,7 @@ AND Type = @InternalPersonType)");
                 stringBuilder.Clear();
             }
 
-            List<string> columns = _retriveItemColumns.ToList();
+            List<string> columns = _retrieveItemColumns.ToList();
             // Unfortunately we need to add it to columns to ensure the order of the columns in the select
             if (!string.IsNullOrEmpty(itemCountColumns))
             {
@@ -5569,7 +5639,7 @@ AND Type = @InternalPersonType)");
             return result;
         }
 
-        private static ItemCounts GetItemCounts(IReadOnlyList<ResultSetValue> reader, int countStartColumn, string[] typesToCount)
+        private static ItemCounts GetItemCounts(IReadOnlyList<ResultSetValue> reader, int countStartColumn, BaseItemKind[] typesToCount)
         {
             var counts = new ItemCounts();
 
diff --git a/Emby.Server.Implementations/Dto/DtoService.cs b/Emby.Server.Implementations/Dto/DtoService.cs
index b91ff6408..365aa8368 100644
--- a/Emby.Server.Implementations/Dto/DtoService.cs
+++ b/Emby.Server.Implementations/Dto/DtoService.cs
@@ -7,9 +7,9 @@ using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
 using System.Linq;
-using System.Threading.Tasks;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common;
 using MediaBrowser.Controller.Channels;
 using MediaBrowser.Controller.Drawing;
@@ -294,7 +294,7 @@ namespace Emby.Server.Implementations.Dto
                             path = path.TrimStart('.');
                         }
 
-                        if (!string.IsNullOrEmpty(path) && containers.Contains(path, StringComparer.OrdinalIgnoreCase))
+                        if (!string.IsNullOrEmpty(path) && containers.Contains(path, StringComparison.OrdinalIgnoreCase))
                         {
                             fileExtensionContainer = path;
                         }
@@ -470,7 +470,7 @@ namespace Emby.Server.Implementations.Dto
             {
                 var parentAlbumIds = _libraryManager.GetItemIds(new InternalItemsQuery
                 {
-                    IncludeItemTypes = new[] { nameof(MusicAlbum) },
+                    IncludeItemTypes = new[] { BaseItemKind.MusicAlbum },
                     Name = item.Album,
                     Limit = 1
                 });
diff --git a/Emby.Server.Implementations/Emby.Server.Implementations.csproj b/Emby.Server.Implementations/Emby.Server.Implementations.csproj
index 95acd216d..329a84acb 100644
--- a/Emby.Server.Implementations/Emby.Server.Implementations.csproj
+++ b/Emby.Server.Implementations/Emby.Server.Implementations.csproj
@@ -29,7 +29,7 @@
     <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="6.0.0" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="6.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="6.0.1" />
     <PackageReference Include="Mono.Nat" Version="3.0.2" />
     <PackageReference Include="prometheus-net.DotNetRuntime" Version="4.2.2" />
     <PackageReference Include="sharpcompress" Version="0.30.1" />
diff --git a/Emby.Server.Implementations/EntryPoints/ExternalPortForwarding.cs b/Emby.Server.Implementations/EntryPoints/ExternalPortForwarding.cs
index d325fa14f..06e57ad12 100644
--- a/Emby.Server.Implementations/EntryPoints/ExternalPortForwarding.cs
+++ b/Emby.Server.Implementations/EntryPoints/ExternalPortForwarding.cs
@@ -13,7 +13,6 @@ using Jellyfin.Networking.Configuration;
 using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Plugins;
-using MediaBrowser.Model.Dlna;
 using Microsoft.Extensions.Logging;
 using Mono.Nat;
 
diff --git a/Emby.Server.Implementations/HttpServer/Security/AuthService.cs b/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
index e7103ec95..1d04f3da3 100644
--- a/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
+++ b/Emby.Server.Implementations/HttpServer/Security/AuthService.cs
@@ -2,7 +2,6 @@
 
 using System.Threading.Tasks;
 using Jellyfin.Data.Enums;
-using MediaBrowser.Controller.Authentication;
 using MediaBrowser.Controller.Net;
 using Microsoft.AspNetCore.Http;
 
diff --git a/Emby.Server.Implementations/Images/CollectionFolderImageProvider.cs b/Emby.Server.Implementations/Images/CollectionFolderImageProvider.cs
index 0229fbae7..7e12ebb08 100644
--- a/Emby.Server.Implementations/Images/CollectionFolderImageProvider.cs
+++ b/Emby.Server.Implementations/Images/CollectionFolderImageProvider.cs
@@ -28,35 +28,35 @@ namespace Emby.Server.Implementations.Images
             var view = (CollectionFolder)item;
             var viewType = view.CollectionType;
 
-            string[] includeItemTypes;
+            BaseItemKind[] includeItemTypes;
 
             if (string.Equals(viewType, CollectionType.Movies, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "Movie" };
+                includeItemTypes = new[] { BaseItemKind.Movie };
             }
             else if (string.Equals(viewType, CollectionType.TvShows, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "Series" };
+                includeItemTypes = new[] { BaseItemKind.Series };
             }
             else if (string.Equals(viewType, CollectionType.Music, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "MusicAlbum" };
+                includeItemTypes = new[] { BaseItemKind.MusicAlbum };
             }
             else if (string.Equals(viewType, CollectionType.Books, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "Book", "AudioBook" };
+                includeItemTypes = new[] { BaseItemKind.Book, BaseItemKind.AudioBook };
             }
             else if (string.Equals(viewType, CollectionType.BoxSets, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "BoxSet" };
+                includeItemTypes = new[] { BaseItemKind.BoxSet };
             }
             else if (string.Equals(viewType, CollectionType.HomeVideos, StringComparison.Ordinal) || string.Equals(viewType, CollectionType.Photos, StringComparison.Ordinal))
             {
-                includeItemTypes = new string[] { "Video", "Photo" };
+                includeItemTypes = new[] { BaseItemKind.Video, BaseItemKind.Photo };
             }
             else
             {
-                includeItemTypes = new string[] { "Video", "Audio", "Photo", "Movie", "Series" };
+                includeItemTypes = new[] { BaseItemKind.Video, BaseItemKind.Audio, BaseItemKind.Photo, BaseItemKind.Movie, BaseItemKind.Series };
             }
 
             var recursive = !string.Equals(CollectionType.Playlists, viewType, StringComparison.OrdinalIgnoreCase);
diff --git a/Emby.Server.Implementations/Images/DynamicImageProvider.cs b/Emby.Server.Implementations/Images/DynamicImageProvider.cs
index 900b3fd9c..575680653 100644
--- a/Emby.Server.Implementations/Images/DynamicImageProvider.cs
+++ b/Emby.Server.Implementations/Images/DynamicImageProvider.cs
@@ -6,6 +6,8 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
@@ -34,14 +36,14 @@ namespace Emby.Server.Implementations.Images
             var view = (UserView)item;
 
             var isUsingCollectionStrip = IsUsingCollectionStrip(view);
-            var recursive = isUsingCollectionStrip && !new[] { CollectionType.BoxSets, CollectionType.Playlists }.Contains(view.ViewType ?? string.Empty, StringComparer.OrdinalIgnoreCase);
+            var recursive = isUsingCollectionStrip && !new[] { CollectionType.BoxSets, CollectionType.Playlists }.Contains(view.ViewType ?? string.Empty, StringComparison.OrdinalIgnoreCase);
 
             var result = view.GetItemList(new InternalItemsQuery
             {
                 User = view.UserId.HasValue ? _userManager.GetUserById(view.UserId.Value) : null,
                 CollapseBoxSetItems = false,
                 Recursive = recursive,
-                ExcludeItemTypes = new[] { "UserView", "CollectionFolder", "Person" },
+                ExcludeItemTypes = new[] { BaseItemKind.UserView, BaseItemKind.CollectionFolder, BaseItemKind.Person },
                 DtoOptions = new DtoOptions(false)
             });
 
diff --git a/Emby.Server.Implementations/Images/GenreImageProvider.cs b/Emby.Server.Implementations/Images/GenreImageProvider.cs
index 1f5090f7f..968bf5fa3 100644
--- a/Emby.Server.Implementations/Images/GenreImageProvider.cs
+++ b/Emby.Server.Implementations/Images/GenreImageProvider.cs
@@ -8,8 +8,6 @@ using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.Entities.Movies;
-using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Providers;
 using MediaBrowser.Model.Entities;
@@ -43,7 +41,7 @@ namespace Emby.Server.Implementations.Images
             return _libraryManager.GetItemList(new InternalItemsQuery
             {
                 Genres = new[] { item.Name },
-                IncludeItemTypes = new[] { nameof(Series), nameof(Movie) },
+                IncludeItemTypes = new[] { BaseItemKind.Series, BaseItemKind.Movie },
                 OrderBy = new[] { (ItemSortBy.Random, SortOrder.Ascending) },
                 Limit = 4,
                 Recursive = true,
diff --git a/Emby.Server.Implementations/Images/MusicGenreImageProvider.cs b/Emby.Server.Implementations/Images/MusicGenreImageProvider.cs
index baf1c9051..31f053f06 100644
--- a/Emby.Server.Implementations/Images/MusicGenreImageProvider.cs
+++ b/Emby.Server.Implementations/Images/MusicGenreImageProvider.cs
@@ -44,9 +44,9 @@ namespace Emby.Server.Implementations.Images
                 Genres = new[] { item.Name },
                 IncludeItemTypes = new[]
                 {
-                    nameof(MusicAlbum),
-                    nameof(MusicVideo),
-                    nameof(Audio)
+                    BaseItemKind.MusicAlbum,
+                    BaseItemKind.MusicVideo,
+                    BaseItemKind.Audio
                 },
                 OrderBy = new[] { (ItemSortBy.Random, SortOrder.Ascending) },
                 Limit = 4,
diff --git a/Emby.Server.Implementations/Library/CoreResolutionIgnoreRule.cs b/Emby.Server.Implementations/Library/CoreResolutionIgnoreRule.cs
index 29758a078..e558fbe27 100644
--- a/Emby.Server.Implementations/Library/CoreResolutionIgnoreRule.cs
+++ b/Emby.Server.Implementations/Library/CoreResolutionIgnoreRule.cs
@@ -54,20 +54,10 @@ namespace Emby.Server.Implementations.Library
             {
                 if (parent != null)
                 {
-                    // Ignore trailer folders but allow it at the collection level
-                    if (string.Equals(filename, BaseItem.TrailersFolderName, StringComparison.OrdinalIgnoreCase)
-                        && !(parent is AggregateFolder)
-                        && !(parent is UserRootFolder))
-                    {
-                        return true;
-                    }
-
-                    if (string.Equals(filename, BaseItem.ThemeVideosFolderName, StringComparison.OrdinalIgnoreCase))
-                    {
-                        return true;
-                    }
-
-                    if (string.Equals(filename, BaseItem.ThemeSongsFolderName, StringComparison.OrdinalIgnoreCase))
+                    // Ignore extras folders but allow it at the collection level
+                    if (_namingOptions.AllExtrasTypesFolderNames.ContainsKey(filename)
+                        && parent is not AggregateFolder
+                        && parent is not UserRootFolder)
                     {
                         return true;
                     }
diff --git a/Emby.Server.Implementations/Library/LibraryManager.cs b/Emby.Server.Implementations/Library/LibraryManager.cs
index 778b6225e..270264dba 100644
--- a/Emby.Server.Implementations/Library/LibraryManager.cs
+++ b/Emby.Server.Implementations/Library/LibraryManager.cs
@@ -11,11 +11,9 @@ using System.Net;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
-using Emby.Naming.Audio;
 using Emby.Naming.Common;
 using Emby.Naming.TV;
 using Emby.Naming.Video;
-using Emby.Server.Implementations.Library.Resolvers;
 using Emby.Server.Implementations.Library.Validators;
 using Emby.Server.Implementations.Playlists;
 using Emby.Server.Implementations.ScheduledTasks;
@@ -533,8 +531,8 @@ namespace Emby.Server.Implementations.Library
             return key.GetMD5();
         }
 
-        public BaseItem ResolvePath(FileSystemMetadata fileInfo, Folder parent = null)
-            => ResolvePath(fileInfo, new DirectoryService(_fileSystem), null, parent);
+        public BaseItem ResolvePath(FileSystemMetadata fileInfo, Folder parent = null, IDirectoryService directoryService = null)
+            => ResolvePath(fileInfo, directoryService ?? new DirectoryService(_fileSystem), null, parent);
 
         private BaseItem ResolvePath(
             FileSystemMetadata fileInfo,
@@ -654,7 +652,7 @@ namespace Emby.Server.Implementations.Library
             return !args.ContainsFileSystemEntryByName(".ignore");
         }
 
-        public IEnumerable<BaseItem> ResolvePaths(IEnumerable<FileSystemMetadata> files, IDirectoryService directoryService, Folder parent, LibraryOptions libraryOptions, string collectionType)
+        public IEnumerable<BaseItem> ResolvePaths(IEnumerable<FileSystemMetadata> files, IDirectoryService directoryService, Folder parent, LibraryOptions libraryOptions, string collectionType = null)
         {
             return ResolvePaths(files, directoryService, parent, libraryOptions, collectionType, EntityResolvers);
         }
@@ -677,7 +675,7 @@ namespace Emby.Server.Implementations.Library
                 {
                     var result = resolver.ResolveMultiple(parent, fileList, collectionType, directoryService);
 
-                    if (result != null && result.Items.Count > 0)
+                    if (result?.Items.Count > 0)
                     {
                         var items = new List<BaseItem>();
                         items.AddRange(result.Items);
@@ -965,7 +963,7 @@ namespace Emby.Server.Implementations.Library
             {
                 var existing = GetItemList(new InternalItemsQuery
                 {
-                    IncludeItemTypes = new[] { nameof(MusicArtist) },
+                    IncludeItemTypes = new[] { BaseItemKind.MusicArtist },
                     Name = name,
                     DtoOptions = options
                 }).Cast<MusicArtist>()
@@ -2685,89 +2683,105 @@ namespace Emby.Server.Implementations.Library
             };
         }
 
-        public IEnumerable<Video> FindTrailers(BaseItem owner, List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)
+        public IEnumerable<BaseItem> FindExtras(BaseItem owner, List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)
         {
-            var namingOptions = _namingOptions;
-
-            var files = owner.IsInMixedFolder ? new List<FileSystemMetadata>() : fileSystemChildren.Where(i => i.IsDirectory)
-                .Where(i => string.Equals(i.Name, BaseItem.TrailersFolderName, StringComparison.OrdinalIgnoreCase))
-                .SelectMany(i => _fileSystem.GetFiles(i.FullName, namingOptions.VideoFileExtensions, false, false))
-                .ToList();
-
-            var videos = VideoListResolver.Resolve(fileSystemChildren, namingOptions);
-
-            var currentVideo = videos.FirstOrDefault(i => string.Equals(owner.Path, i.Files[0].Path, StringComparison.OrdinalIgnoreCase));
-
-            if (currentVideo != null)
+            var ownerVideoInfo = VideoResolver.Resolve(owner.Path, owner.IsFolder, _namingOptions);
+            if (ownerVideoInfo == null)
             {
-                files.AddRange(currentVideo.Extras.Where(i => i.ExtraType == ExtraType.Trailer).Select(i => _fileSystem.GetFileInfo(i.Path)));
+                yield break;
             }
 
-            var resolvers = new IItemResolver[]
+            var count = fileSystemChildren.Count;
+            var files = new List<VideoFileInfo>();
+            var nonVideoFiles = new List<FileSystemMetadata>();
+            for (var i = 0; i < count; i++)
             {
-                new GenericVideoResolver<Trailer>(_namingOptions)
-            };
+                var current = fileSystemChildren[i];
+                if (current.IsDirectory && _namingOptions.AllExtrasTypesFolderNames.ContainsKey(current.Name))
+                {
+                    var filesInSubFolder = _fileSystem.GetFiles(current.FullName, _namingOptions.VideoFileExtensions, false, false);
+                    foreach (var file in filesInSubFolder)
+                    {
+                        var videoInfo = VideoResolver.Resolve(file.FullName, file.IsDirectory, _namingOptions);
+                        if (videoInfo == null)
+                        {
+                            nonVideoFiles.Add(file);
+                            continue;
+                        }
 
-            return ResolvePaths(files, directoryService, null, new LibraryOptions(), null, resolvers)
-                .OfType<Trailer>()
-                .Select(video =>
+                        files.Add(videoInfo);
+                    }
+                }
+                else if (!current.IsDirectory)
                 {
-                    // Try to retrieve it from the db. If we don't find it, use the resolved version
-                    if (GetItemById(video.Id) is Trailer dbItem)
+                    var videoInfo = VideoResolver.Resolve(current.FullName, current.IsDirectory, _namingOptions);
+                    if (videoInfo == null)
                     {
-                        video = dbItem;
+                        nonVideoFiles.Add(current);
+                        continue;
                     }
 
-                    video.ParentId = Guid.Empty;
-                    video.OwnerId = owner.Id;
-                    video.ExtraType = ExtraType.Trailer;
-                    video.TrailerTypes = new[] { TrailerType.LocalTrailer };
-
-                    return video;
-
-                    // Sort them so that the list can be easily compared for changes
-                }).OrderBy(i => i.Path);
-        }
-
-        public IEnumerable<Video> FindExtras(BaseItem owner, List<FileSystemMetadata> fileSystemChildren, IDirectoryService directoryService)
-        {
-            var namingOptions = _namingOptions;
+                    files.Add(videoInfo);
+                }
+            }
 
-            var files = owner.IsInMixedFolder ? new List<FileSystemMetadata>() : fileSystemChildren.Where(i => i.IsDirectory)
-                .Where(i => BaseItem.AllExtrasTypesFolderNames.ContainsKey(i.Name ?? string.Empty))
-                .SelectMany(i => _fileSystem.GetFiles(i.FullName, namingOptions.VideoFileExtensions, false, false))
-                .ToList();
+            if (files.Count == 0)
+            {
+                yield break;
+            }
 
-            var videos = VideoListResolver.Resolve(fileSystemChildren, namingOptions);
+            var videos = VideoListResolver.Resolve(files, _namingOptions);
+            // owner video info cannot be null as that implies it has no path
+            var extras = ExtraResolver.GetExtras(videos, ownerVideoInfo, _namingOptions.VideoFlagDelimiters);
+            for (var i = 0; i < extras.Count; i++)
+            {
+                var currentExtra = extras[i];
+                var resolved = ResolvePath(_fileSystem.GetFileInfo(currentExtra.Path), null, directoryService);
+                if (resolved is not Video video)
+                {
+                    continue;
+                }
 
-            var currentVideo = videos.FirstOrDefault(i => string.Equals(owner.Path, i.Files[0].Path, StringComparison.OrdinalIgnoreCase));
+                // Try to retrieve it from the db. If we don't find it, use the resolved version
+                if (GetItemById(resolved.Id) is Video dbItem)
+                {
+                    video = dbItem;
+                }
 
-            if (currentVideo != null)
-            {
-                files.AddRange(currentVideo.Extras.Where(i => i.ExtraType != ExtraType.Trailer).Select(i => _fileSystem.GetFileInfo(i.Path)));
+                video.ExtraType = currentExtra.ExtraType;
+                video.ParentId = Guid.Empty;
+                video.OwnerId = owner.Id;
+                yield return video;
             }
 
-            return ResolvePaths(files, directoryService, null, new LibraryOptions(), null)
-                .OfType<Video>()
-                .Select(video =>
+            // TODO: theme songs must be handled "manually" (but should we?) since they aren't video files
+            for (var i = 0; i < nonVideoFiles.Count; i++)
+            {
+                var current = nonVideoFiles[i];
+                var extraInfo = ExtraResolver.GetExtraInfo(current.FullName, _namingOptions);
+                if (extraInfo.ExtraType != ExtraType.ThemeSong)
                 {
-                    // Try to retrieve it from the db. If we don't find it, use the resolved version
-                    var dbItem = GetItemById(video.Id) as Video;
-
-                    if (dbItem != null)
-                    {
-                        video = dbItem;
-                    }
+                    continue;
+                }
 
-                    video.ParentId = Guid.Empty;
-                    video.OwnerId = owner.Id;
+                var resolved = ResolvePath(current, null, directoryService);
+                if (resolved is not Audio themeSong)
+                {
+                    continue;
+                }
 
-                    SetExtraTypeFromFilename(video);
+                // Try to retrieve it from the db. If we don't find it, use the resolved version
+                if (GetItemById(themeSong.Id) is Audio dbItem)
+                {
+                    themeSong = dbItem;
+                }
 
-                    return video;
+                themeSong.ExtraType = ExtraType.ThemeSong;
+                themeSong.OwnerId = owner.Id;
+                themeSong.ParentId = Guid.Empty;
 
-                    // Sort them so that the list can be easily compared for changes
-                }).OrderBy(i => i.Path);
+                yield return themeSong;
+            }
         }
 
         public string GetPathAfterNetworkSubstitution(string path, BaseItem ownerItem)
@@ -2817,15 +2831,6 @@ namespace Emby.Server.Implementations.Library
             return path;
         }
 
-        private void SetExtraTypeFromFilename(Video item)
-        {
-            var resolver = new ExtraResolver(_namingOptions);
-
-            var result = resolver.GetExtraInfo(item.Path);
-
-            item.ExtraType = result.ExtraType;
-        }
-
         public List<PersonInfo> GetPeople(InternalPeopleQuery query)
         {
             return _itemRepository.GetPeople(query);
@@ -2932,11 +2937,12 @@ namespace Emby.Server.Implementations.Library
 
             var rootFolderPath = _configurationManager.ApplicationPaths.DefaultUserViewsPath;
 
+            var existingNameCount = 1; // first numbered name will be 2
             var virtualFolderPath = Path.Combine(rootFolderPath, name);
             while (Directory.Exists(virtualFolderPath))
             {
-                name += "1";
-                virtualFolderPath = Path.Combine(rootFolderPath, name);
+                existingNameCount++;
+                virtualFolderPath = Path.Combine(rootFolderPath, name + " " + existingNameCount);
             }
 
             var mediaPathInfos = options.PathInfos;
diff --git a/Emby.Server.Implementations/Library/MediaStreamSelector.cs b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
index b3837fedb..da0c89c13 100644
--- a/Emby.Server.Implementations/Library/MediaStreamSelector.cs
+++ b/Emby.Server.Implementations/Library/MediaStreamSelector.cs
@@ -6,6 +6,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Model.Entities;
 
 namespace Emby.Server.Implementations.Library
@@ -64,18 +65,18 @@ namespace Emby.Server.Implementations.Library
                 stream = sortedStreams.FirstOrDefault(s => s.IsExternal || s.IsForced || s.IsDefault);
 
                 // if the audio language is not understood by the user, load their preferred subs, if there are any
-                if (stream == null && !preferredLanguages.Contains(audioTrackLanguage, StringComparer.OrdinalIgnoreCase))
+                if (stream == null && !preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
                 {
-                    stream = sortedStreams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparer.OrdinalIgnoreCase));
+                    stream = sortedStreams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase));
                 }
             }
             else if (mode == SubtitlePlaybackMode.Smart)
             {
                 // if the audio language is not understood by the user, load their preferred subs, if there are any
-                if (!preferredLanguages.Contains(audioTrackLanguage, StringComparer.OrdinalIgnoreCase))
+                if (!preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
                 {
-                    stream = streams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparer.OrdinalIgnoreCase)) ??
-                        streams.FirstOrDefault(s => preferredLanguages.Contains(s.Language, StringComparer.OrdinalIgnoreCase));
+                    stream = streams.FirstOrDefault(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase)) ??
+                        streams.FirstOrDefault(s => preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase));
                 }
             }
             else if (mode == SubtitlePlaybackMode.Always)
@@ -136,9 +137,9 @@ namespace Emby.Server.Implementations.Library
             else if (mode == SubtitlePlaybackMode.Smart)
             {
                 // Prefer smart logic over embedded metadata
-                if (!preferredLanguages.Contains(audioTrackLanguage, StringComparer.OrdinalIgnoreCase))
+                if (!preferredLanguages.Contains(audioTrackLanguage, StringComparison.OrdinalIgnoreCase))
                 {
-                    filteredStreams = streams.Where(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparer.OrdinalIgnoreCase))
+                    filteredStreams = streams.Where(s => !s.IsForced && preferredLanguages.Contains(s.Language, StringComparison.OrdinalIgnoreCase))
                         .ToList();
                 }
             }
diff --git a/Emby.Server.Implementations/Library/MusicManager.cs b/Emby.Server.Implementations/Library/MusicManager.cs
index e2f1fb0ad..d33213564 100644
--- a/Emby.Server.Implementations/Library/MusicManager.cs
+++ b/Emby.Server.Implementations/Library/MusicManager.cs
@@ -52,7 +52,7 @@ namespace Emby.Server.Implementations.Library
             var genres = item
                .GetRecursiveChildren(user, new InternalItemsQuery(user)
                {
-                   IncludeItemTypes = new[] { nameof(Audio) },
+                   IncludeItemTypes = new[] { BaseItemKind.Audio },
                    DtoOptions = dtoOptions
                })
                .Cast<Audio>()
@@ -89,7 +89,7 @@ namespace Emby.Server.Implementations.Library
         {
             return _libraryManager.GetItemList(new InternalItemsQuery(user)
             {
-                IncludeItemTypes = new[] { nameof(Audio) },
+                IncludeItemTypes = new[] { BaseItemKind.Audio },
 
                 GenreIds = genreIds.ToArray(),
 
diff --git a/Emby.Server.Implementations/Library/PathExtensions.cs b/Emby.Server.Implementations/Library/PathExtensions.cs
index d5b855cdf..6f61dc713 100644
--- a/Emby.Server.Implementations/Library/PathExtensions.cs
+++ b/Emby.Server.Implementations/Library/PathExtensions.cs
@@ -16,7 +16,7 @@ namespace Emby.Server.Implementations.Library
         /// <param name="attribute">The attrib.</param>
         /// <returns>System.String.</returns>
         /// <exception cref="ArgumentException"><paramref name="str" /> or <paramref name="attribute" /> is empty.</exception>
-        public static string? GetAttributeValue(this string str, string attribute)
+        public static string? GetAttributeValue(this ReadOnlySpan<char> str, ReadOnlySpan<char> attribute)
         {
             if (str.Length == 0)
             {
@@ -28,17 +28,31 @@ namespace Emby.Server.Implementations.Library
                 throw new ArgumentException("String can't be empty.", nameof(attribute));
             }
 
-            string srch = "[" + attribute + "=";
-            int start = str.IndexOf(srch, StringComparison.OrdinalIgnoreCase);
-            if (start != -1)
+            var attributeIndex = str.IndexOf(attribute, StringComparison.OrdinalIgnoreCase);
+
+            // Must be at least 3 characters after the attribute =, ], any character.
+            var maxIndex = str.Length - attribute.Length - 3;
+            while (attributeIndex > -1 && attributeIndex < maxIndex)
             {
-                start += srch.Length;
-                int end = str.IndexOf(']', start);
-                return str.Substring(start, end - start);
+                var attributeEnd = attributeIndex + attribute.Length;
+                if (attributeIndex > 0
+                    && str[attributeIndex - 1] == '['
+                    && str[attributeEnd] == '=')
+                {
+                    var closingIndex = str[attributeEnd..].IndexOf(']');
+                    // Must be at least 1 character before the closing bracket.
+                    if (closingIndex > 1)
+                    {
+                        return str[(attributeEnd + 1)..(attributeEnd + closingIndex)].Trim().ToString();
+                    }
+                }
+
+                str = str[attributeEnd..];
+                attributeIndex = str.IndexOf(attribute, StringComparison.OrdinalIgnoreCase);
             }
 
             // for imdbid we also accept pattern matching
-            if (string.Equals(attribute, "imdbid", StringComparison.OrdinalIgnoreCase))
+            if (attribute.Equals("imdbid", StringComparison.OrdinalIgnoreCase))
             {
                 var match = ProviderIdParsers.TryFindImdbId(str, out var imdbId);
                 return match ? imdbId.ToString() : null;
diff --git a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
index 27e18be42..210ed0953 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Audio/MusicArtistResolver.cs
@@ -4,12 +4,10 @@ using System;
 using System.Linq;
 using System.Threading.Tasks;
 using Emby.Naming.Common;
-using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Resolvers;
 using MediaBrowser.Model.Entities;
-using MediaBrowser.Model.IO;
 using Microsoft.Extensions.Logging;
 
 namespace Emby.Server.Implementations.Library.Resolvers.Audio
diff --git a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
index 0ebf0e530..9222a9479 100644
--- a/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/BaseVideoResolver.cs
@@ -49,120 +49,71 @@ namespace Emby.Server.Implementations.Library.Resolvers
         protected virtual TVideoType ResolveVideo<TVideoType>(ItemResolveArgs args, bool parseName)
               where TVideoType : Video, new()
         {
-            var namingOptions = NamingOptions;
+            VideoFileInfo videoInfo = null;
+            VideoType? videoType = null;
 
             // If the path is a file check for a matching extensions
             if (args.IsDirectory)
             {
-                TVideoType video = null;
-                VideoFileInfo videoInfo = null;
-
                 // Loop through each child file/folder and see if we find a video
                 foreach (var child in args.FileSystemChildren)
                 {
                     var filename = child.Name;
-
                     if (child.IsDirectory)
                     {
                         if (IsDvdDirectory(child.FullName, filename, args.DirectoryService))
                         {
-                            videoInfo = VideoResolver.ResolveDirectory(args.Path, namingOptions);
-
-                            if (videoInfo == null)
-                            {
-                                return null;
-                            }
-
-                            video = new TVideoType
-                            {
-                                Path = args.Path,
-                                VideoType = VideoType.Dvd,
-                                ProductionYear = videoInfo.Year
-                            };
-                            break;
+                            videoType = VideoType.Dvd;
                         }
-
-                        if (IsBluRayDirectory(filename))
+                        else if (IsBluRayDirectory(filename))
                         {
-                            videoInfo = VideoResolver.ResolveDirectory(args.Path, namingOptions);
-
-                            if (videoInfo == null)
-                            {
-                                return null;
-                            }
-
-                            video = new TVideoType
-                            {
-                                Path = args.Path,
-                                VideoType = VideoType.BluRay,
-                                ProductionYear = videoInfo.Year
-                            };
-                            break;
+                            videoType = VideoType.BluRay;
                         }
                     }
                     else if (IsDvdFile(filename))
                     {
-                        videoInfo = VideoResolver.ResolveDirectory(args.Path, namingOptions);
-
-                        if (videoInfo == null)
-                        {
-                            return null;
-                        }
-
-                        video = new TVideoType
-                        {
-                            Path = args.Path,
-                            VideoType = VideoType.Dvd,
-                            ProductionYear = videoInfo.Year
-                        };
-                        break;
+                        videoType = VideoType.Dvd;
                     }
-                }
 
-                if (video != null)
-                {
-                    video.Name = parseName ?
-                        videoInfo.Name :
-                        Path.GetFileName(args.Path);
+                    if (videoType == null)
+                    {
+                        continue;
+                    }
 
-                    Set3DFormat(video, videoInfo);
+                    videoInfo = VideoResolver.ResolveDirectory(args.Path, NamingOptions, parseName);
+                    break;
                 }
-
-                return video;
             }
             else
             {
-                var videoInfo = VideoResolver.Resolve(args.Path, false, namingOptions, false);
-
-                if (videoInfo == null)
-                {
-                    return null;
-                }
-
-                if (VideoResolver.IsVideoFile(args.Path, NamingOptions) || videoInfo.IsStub)
-                {
-                    var path = args.Path;
-
-                    var video = new TVideoType
-                    {
-                        Path = path,
-                        IsInMixedFolder = true,
-                        ProductionYear = videoInfo.Year
-                    };
-
-                    SetVideoType(video, videoInfo);
+                videoInfo = VideoResolver.Resolve(args.Path, false, NamingOptions, parseName);
+            }
 
-                    video.Name = parseName ?
-                        videoInfo.Name :
-                        Path.GetFileNameWithoutExtension(args.Path);
+            if (videoInfo == null || (!videoInfo.IsStub && !VideoResolver.IsVideoFile(args.Path, NamingOptions)))
+            {
+                return null;
+            }
 
-                    Set3DFormat(video, videoInfo);
+            var video = new TVideoType
+            {
+                Name = videoInfo.Name,
+                Path = args.Path,
+                ProductionYear = videoInfo.Year,
+                ExtraType = videoInfo.ExtraType
+            };
 
-                    return video;
-                }
+            if (videoType.HasValue)
+            {
+                video.VideoType = videoType.Value;
             }
+            else
+            {
+                SetVideoType(video, videoInfo);
+            }
+
+            Set3DFormat(video, videoInfo);
 
-            return null;
+            return video;
         }
 
         protected void SetVideoType(Video video, VideoFileInfo videoInfo)
@@ -207,8 +158,8 @@ namespace Emby.Server.Implementations.Library.Resolvers
                 {
                     // use disc-utils, both DVDs and BDs use UDF filesystem
                     using (var videoFileStream = File.Open(video.Path, FileMode.Open, FileAccess.Read))
+                    using (UdfReader udfReader = new UdfReader(videoFileStream))
                     {
-                        UdfReader udfReader = new UdfReader(videoFileStream);
                         if (udfReader.DirectoryExists("VIDEO_TS"))
                         {
                             video.IsoType = IsoType.Dvd;
diff --git a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
index e685c87f1..8f224f547 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Books/BookResolver.cs
@@ -5,6 +5,7 @@
 using System;
 using System.IO;
 using System.Linq;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Entities;
@@ -32,7 +33,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Books
 
             var extension = Path.GetExtension(args.Path);
 
-            if (extension != null && _validExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase))
+            if (extension != null && _validExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
             {
                 // It's a book
                 return new Book
diff --git a/Emby.Server.Implementations/Library/Resolvers/Movies/BoxSetResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Movies/BoxSetResolver.cs
index e7abe1e6d..6cc04ea81 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Movies/BoxSetResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Movies/BoxSetResolver.cs
@@ -65,7 +65,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         private static void SetProviderIdFromPath(BaseItem item)
         {
             // we need to only look at the name of this actual item (not parents)
-            var justName = Path.GetFileName(item.Path);
+            var justName = Path.GetFileName(item.Path.AsSpan());
 
             var id = justName.GetAttributeValue("tmdbid");
 
diff --git a/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs b/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
index 732be0fe5..4feaf3fb4 100644
--- a/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/Movies/MovieResolver.cs
@@ -26,7 +26,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
     public class MovieResolver : BaseVideoResolver<Video>, IMultiItemResolver
     {
         private readonly IImageProcessor _imageProcessor;
-        private readonly StackResolver _stackResolver;
 
         private string[] _validCollectionTypes = new[]
         {
@@ -46,7 +45,6 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             : base(namingOptions)
         {
             _imageProcessor = imageProcessor;
-            _stackResolver = new StackResolver(NamingOptions);
         }
 
         /// <summary>
@@ -62,7 +60,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             string collectionType,
             IDirectoryService directoryService)
         {
-            var result = ResolveMultipleInternal(parent, files, collectionType, directoryService);
+            var result = ResolveMultipleInternal(parent, files, collectionType);
 
             if (result != null)
             {
@@ -92,16 +90,17 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                     return null;
                 }
 
+                Video movie = null;
                 var files = args.GetActualFileSystemChildren().ToList();
 
                 if (string.Equals(collectionType, CollectionType.MusicVideos, StringComparison.OrdinalIgnoreCase))
                 {
-                    return FindMovie<MusicVideo>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, false);
+                    movie = FindMovie<MusicVideo>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, false);
                 }
 
                 if (string.Equals(collectionType, CollectionType.HomeVideos, StringComparison.OrdinalIgnoreCase))
                 {
-                    return FindMovie<Video>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, false);
+                    movie = FindMovie<Video>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, false);
                 }
 
                 if (string.IsNullOrEmpty(collectionType))
@@ -118,17 +117,16 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                         return null;
                     }
 
-                    {
-                        return FindMovie<Movie>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, true);
-                    }
+                    movie = FindMovie<Movie>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, true);
                 }
 
                 if (string.Equals(collectionType, CollectionType.Movies, StringComparison.OrdinalIgnoreCase))
                 {
-                    return FindMovie<Movie>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, true);
+                    movie = FindMovie<Movie>(args, args.Path, args.Parent, files, args.DirectoryService, collectionType, true);
                 }
 
-                return null;
+                // ignore extras
+                return movie?.ExtraType == null ? movie : null;
             }
 
             // Handle owned items
@@ -169,6 +167,12 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 item = ResolveVideo<Video>(args, false);
             }
 
+            // Ignore extras
+            if (item?.ExtraType != null)
+            {
+                return null;
+            }
+
             if (item != null)
             {
                 item.IsInMixedFolder = true;
@@ -180,8 +184,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         private MultiItemResolverResult ResolveMultipleInternal(
             Folder parent,
             List<FileSystemMetadata> files,
-            string collectionType,
-            IDirectoryService directoryService)
+            string collectionType)
         {
             if (IsInvalid(parent, collectionType))
             {
@@ -190,13 +193,13 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
 
             if (string.Equals(collectionType, CollectionType.MusicVideos, StringComparison.OrdinalIgnoreCase))
             {
-                return ResolveVideos<MusicVideo>(parent, files, directoryService, true, collectionType, false);
+                return ResolveVideos<MusicVideo>(parent, files, true, collectionType, false);
             }
 
             if (string.Equals(collectionType, CollectionType.HomeVideos, StringComparison.OrdinalIgnoreCase) ||
                             string.Equals(collectionType, CollectionType.Photos, StringComparison.OrdinalIgnoreCase))
             {
-                return ResolveVideos<Video>(parent, files, directoryService, false, collectionType, false);
+                return ResolveVideos<Video>(parent, files, false, collectionType, false);
             }
 
             if (string.IsNullOrEmpty(collectionType))
@@ -204,7 +207,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 // Owned items should just use the plain video type
                 if (parent == null)
                 {
-                    return ResolveVideos<Video>(parent, files, directoryService, false, collectionType, false);
+                    return ResolveVideos<Video>(parent, files, false, collectionType, false);
                 }
 
                 if (parent is Series || parent.GetParents().OfType<Series>().Any())
@@ -212,12 +215,12 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                     return null;
                 }
 
-                return ResolveVideos<Movie>(parent, files, directoryService, false, collectionType, true);
+                return ResolveVideos<Movie>(parent, files, false, collectionType, true);
             }
 
             if (string.Equals(collectionType, CollectionType.Movies, StringComparison.OrdinalIgnoreCase))
             {
-                return ResolveVideos<Movie>(parent, files, directoryService, true, collectionType, true);
+                return ResolveVideos<Movie>(parent, files, true, collectionType, true);
             }
 
             return null;
@@ -226,21 +229,20 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         private MultiItemResolverResult ResolveVideos<T>(
             Folder parent,
             IEnumerable<FileSystemMetadata> fileSystemEntries,
-            IDirectoryService directoryService,
-            bool suppportMultiEditions,
+            bool supportMultiEditions,
             string collectionType,
             bool parseName)
             where T : Video, new()
         {
             var files = new List<FileSystemMetadata>();
-            var videos = new List<BaseItem>();
             var leftOver = new List<FileSystemMetadata>();
+            var hasCollectionType = !string.IsNullOrEmpty(collectionType);
 
             // Loop through each child file/folder and see if we find a video
             foreach (var child in fileSystemEntries)
             {
                 // This is a hack but currently no better way to resolve a sometimes ambiguous situation
-                if (string.IsNullOrEmpty(collectionType))
+                if (!hasCollectionType)
                 {
                     if (string.Equals(child.Name, "tvshow.nfo", StringComparison.OrdinalIgnoreCase)
                         || string.Equals(child.Name, "season.nfo", StringComparison.OrdinalIgnoreCase))
@@ -259,29 +261,39 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 }
             }
 
-            var resolverResult = VideoListResolver.Resolve(files, NamingOptions, suppportMultiEditions).ToList();
+            var videoInfos = files
+                .Select(i => VideoResolver.Resolve(i.FullName, i.IsDirectory, NamingOptions, parseName))
+                .Where(f => f != null)
+                .ToList();
+
+            var resolverResult = VideoListResolver.Resolve(videoInfos, NamingOptions, supportMultiEditions, parseName);
 
             var result = new MultiItemResolverResult
             {
-                ExtraFiles = leftOver,
-                Items = videos
+                ExtraFiles = leftOver
             };
 
-            var isInMixedFolder = resolverResult.Count > 1 || (parent != null && parent.IsTopParent);
+            var isInMixedFolder = resolverResult.Count > 1 || parent?.IsTopParent == true;
 
             foreach (var video in resolverResult)
             {
                 var firstVideo = video.Files[0];
+                var path = firstVideo.Path;
+                if (video.ExtraType != null)
+                {
+                    result.ExtraFiles.Add(files.Find(f => string.Equals(f.FullName, path, StringComparison.OrdinalIgnoreCase)));
+                    continue;
+                }
+
+                var additionalParts = video.Files.Count > 1 ? video.Files.Skip(1).Select(i => i.Path).ToArray() : Array.Empty<string>();
 
                 var videoItem = new T
                 {
-                    Path = video.Files[0].Path,
+                    Path = path,
                     IsInMixedFolder = isInMixedFolder,
                     ProductionYear = video.Year,
-                    Name = parseName ?
-                        video.Name :
-                        Path.GetFileNameWithoutExtension(video.Files[0].Path),
-                    AdditionalParts = video.Files.Skip(1).Select(i => i.Path).ToArray(),
+                    Name = parseName ? video.Name : firstVideo.Name,
+                    AdditionalParts = additionalParts,
                     LocalAlternateVersions = video.AlternateVersions.Select(i => i.Path).ToArray()
                 };
 
@@ -299,21 +311,34 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
         private static bool IsIgnored(string filename)
         {
             // Ignore samples
-            Match m = Regex.Match(filename, @"\bsample\b", RegexOptions.IgnoreCase);
+            Match m = Regex.Match(filename, @"\bsample\b", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 
             return m.Success;
         }
 
-        private bool ContainsFile(List<VideoInfo> result, FileSystemMetadata file)
+        private static bool ContainsFile(IReadOnlyList<VideoInfo> result, FileSystemMetadata file)
         {
-            return result.Any(i => ContainsFile(i, file));
-        }
+            for (var i = 0; i < result.Count; i++)
+            {
+                var current = result[i];
+                for (var j = 0; j < current.Files.Count; j++)
+                {
+                    if (ContainsFile(current.Files[j], file))
+                    {
+                        return true;
+                    }
+                }
 
-        private bool ContainsFile(VideoInfo result, FileSystemMetadata file)
-        {
-            return result.Files.Any(i => ContainsFile(i, file)) ||
-                result.AlternateVersions.Any(i => ContainsFile(i, file)) ||
-                result.Extras.Any(i => ContainsFile(i, file));
+                for (var j = 0; j < current.AlternateVersions.Count; j++)
+                {
+                    if (ContainsFile(current.AlternateVersions[j], file))
+                    {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
         }
 
         private static bool ContainsFile(VideoFileInfo result, FileSystemMetadata file)
@@ -342,9 +367,9 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             if (item is Movie || item is MusicVideo)
             {
                 // We need to only look at the name of this actual item (not parents)
-                var justName = item.IsInMixedFolder ? Path.GetFileName(item.Path) : Path.GetFileName(item.ContainingFolderPath);
+                var justName = item.IsInMixedFolder ? Path.GetFileName(item.Path.AsSpan()) : Path.GetFileName(item.ContainingFolderPath.AsSpan());
 
-                if (!string.IsNullOrEmpty(justName))
+                if (!justName.IsEmpty)
                 {
                     // check for tmdb id
                     var tmdbid = justName.GetAttributeValue("tmdbid");
@@ -358,7 +383,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 if (!string.IsNullOrEmpty(item.Path))
                 {
                     // check for imdb id - we use full media path, as we can assume, that this will match in any use case (wither id in parent dir or in file name)
-                    var imdbid = item.Path.GetAttributeValue("imdbid");
+                    var imdbid = item.Path.AsSpan().GetAttributeValue("imdbid");
 
                     if (!string.IsNullOrWhiteSpace(imdbid))
                     {
@@ -431,7 +456,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
             // TODO: Allow GetMultiDiscMovie in here
             const bool SupportsMultiVersion = true;
 
-            var result = ResolveVideos<T>(parent, fileSystemEntries, directoryService, SupportsMultiVersion, collectionType, parseName) ??
+            var result = ResolveVideos<T>(parent, fileSystemEntries, SupportsMultiVersion, collectionType, parseName) ??
                 new MultiItemResolverResult();
 
             if (result.Items.Count == 1)
@@ -510,7 +535,7 @@ namespace Emby.Server.Implementations.Library.Resolvers.Movies
                 return null;
             }
 
-            var result = _stackResolver.ResolveDirectories(folderPaths).ToList();
+            var result = StackResolver.ResolveDirectories(folderPaths, NamingOptions).ToList();
 
             if (result.Count != 1)
             {
diff --git a/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs b/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
index 51d819303..e52b43050 100644
--- a/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/PhotoResolver.cs
@@ -8,6 +8,7 @@ using System.IO;
 using System.Linq;
 using Emby.Naming.Common;
 using Emby.Naming.Video;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -109,7 +110,7 @@ namespace Emby.Server.Implementations.Library.Resolvers
             }
 
             string extension = Path.GetExtension(path).TrimStart('.');
-            return imageProcessor.SupportedInputFormats.Contains(extension, StringComparer.OrdinalIgnoreCase);
+            return imageProcessor.SupportedInputFormats.Contains(extension, StringComparison.OrdinalIgnoreCase);
         }
     }
 }
diff --git a/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs b/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
index 8ce59717d..6b0dfe986 100644
--- a/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/PlaylistResolver.cs
@@ -5,6 +5,7 @@
 using System;
 using System.IO;
 using System.Linq;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Playlists;
 using MediaBrowser.Controller.Resolvers;
@@ -57,10 +58,10 @@ namespace Emby.Server.Implementations.Library.Resolvers
 
             // Check if this is a music playlist file
             // It should have the correct collection type and a supported file extension
-            else if (_musicPlaylistCollectionTypes.Contains(args.CollectionType ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+            else if (_musicPlaylistCollectionTypes.Contains(args.CollectionType ?? string.Empty, StringComparison.OrdinalIgnoreCase))
             {
                 var extension = Path.GetExtension(args.Path);
-                if (Playlist.SupportedExtensions.Contains(extension ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+                if (Playlist.SupportedExtensions.Contains(extension ?? string.Empty, StringComparison.OrdinalIgnoreCase))
                 {
                     return new Playlist
                     {
diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
index f72da3617..be9905647 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/EpisodeResolver.cs
@@ -3,7 +3,6 @@
 using System;
 using System.Linq;
 using Emby.Naming.Common;
-using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Entities;
@@ -45,34 +44,36 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
 
             // If the parent is a Season or Series and the parent is not an extras folder, then this is an Episode if the VideoResolver returns something
             // Also handle flat tv folders
-            if ((season != null ||
-                 string.Equals(args.GetCollectionType(), CollectionType.TvShows, StringComparison.OrdinalIgnoreCase) ||
-                 args.HasParent<Series>())
-                && (parent is Series || !BaseItem.AllExtrasTypesFolderNames.ContainsKey(parent.Name)))
+            if (season != null ||
+                string.Equals(args.GetCollectionType(), CollectionType.TvShows, StringComparison.OrdinalIgnoreCase) ||
+                args.HasParent<Series>())
             {
                 var episode = ResolveVideo<Episode>(args, false);
 
-                if (episode != null)
+                // Ignore extras
+                if (episode == null || episode.ExtraType != null)
                 {
-                    var series = parent as Series ?? parent.GetParents().OfType<Series>().FirstOrDefault();
+                    return null;
+                }
 
-                    if (series != null)
-                    {
-                        episode.SeriesId = series.Id;
-                        episode.SeriesName = series.Name;
-                    }
+                var series = parent as Series ?? parent.GetParents().OfType<Series>().FirstOrDefault();
 
-                    if (season != null)
-                    {
-                        episode.SeasonId = season.Id;
-                        episode.SeasonName = season.Name;
-                    }
+                if (series != null)
+                {
+                    episode.SeriesId = series.Id;
+                    episode.SeriesName = series.Name;
+                }
 
-                    // Assume season 1 if there's no season folder and a season number could not be determined
-                    if (season == null && !episode.ParentIndexNumber.HasValue && (episode.IndexNumber.HasValue || episode.PremiereDate.HasValue))
-                    {
-                        episode.ParentIndexNumber = 1;
-                    }
+                if (season != null)
+                {
+                    episode.SeasonId = season.Id;
+                    episode.SeasonName = season.Name;
+                }
+
+                // Assume season 1 if there's no season folder and a season number could not be determined
+                if (season == null && !episode.ParentIndexNumber.HasValue && (episode.IndexNumber.HasValue || episode.PremiereDate.HasValue))
+                {
+                    episode.ParentIndexNumber = 1;
                 }
 
                 return episode;
diff --git a/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs b/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
index 4e15acd18..f5ac3c665 100644
--- a/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
+++ b/Emby.Server.Implementations/Library/Resolvers/TV/SeriesResolver.cs
@@ -5,12 +5,9 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using Emby.Naming.Common;
 using Emby.Naming.TV;
 using Emby.Naming.Video;
-using MediaBrowser.Common.Configuration;
-using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Resolvers;
@@ -185,13 +182,42 @@ namespace Emby.Server.Implementations.Library.Resolvers.TV
         /// <param name="path">The path.</param>
         private static void SetProviderIdFromPath(Series item, string path)
         {
-            var justName = Path.GetFileName(path);
+            var justName = Path.GetFileName(path.AsSpan());
 
-            var id = justName.GetAttributeValue("tvdbid");
+            var tvdbId = justName.GetAttributeValue("tvdbid");
+            if (!string.IsNullOrEmpty(tvdbId))
+            {
+                item.SetProviderId(MetadataProvider.Tvdb, tvdbId);
+            }
+
+            var tvmazeId = justName.GetAttributeValue("tvmazeid");
+            if (!string.IsNullOrEmpty(tvmazeId))
+            {
+                item.SetProviderId(MetadataProvider.TvMaze, tvmazeId);
+            }
+
+            var tmdbId = justName.GetAttributeValue("tmdbid");
+            if (!string.IsNullOrEmpty(tmdbId))
+            {
+                item.SetProviderId(MetadataProvider.Tmdb, tmdbId);
+            }
+
+            var anidbId = justName.GetAttributeValue("anidbid");
+            if (!string.IsNullOrEmpty(anidbId))
+            {
+                item.SetProviderId("AniDB", anidbId);
+            }
+
+            var aniListId = justName.GetAttributeValue("anilistid");
+            if (!string.IsNullOrEmpty(aniListId))
+            {
+                item.SetProviderId("AniList", aniListId);
+            }
 
-            if (!string.IsNullOrEmpty(id))
+            var aniSearchId = justName.GetAttributeValue("anisearchid");
+            if (!string.IsNullOrEmpty(aniSearchId))
             {
-                item.SetProviderId(MetadataProvider.Tvdb, id);
+                item.SetProviderId("AniSearch", aniSearchId);
             }
         }
     }
diff --git a/Emby.Server.Implementations/Library/SearchEngine.cs b/Emby.Server.Implementations/Library/SearchEngine.cs
index bebc25b77..4aacf7774 100644
--- a/Emby.Server.Implementations/Library/SearchEngine.cs
+++ b/Emby.Server.Implementations/Library/SearchEngine.cs
@@ -10,12 +10,9 @@ using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Querying;
 using MediaBrowser.Model.Search;
-using Genre = MediaBrowser.Controller.Entities.Genre;
-using Person = MediaBrowser.Controller.Entities.Person;
 
 namespace Emby.Server.Implementations.Library
 {
@@ -59,9 +56,9 @@ namespace Emby.Server.Implementations.Library
             };
         }
 
-        private static void AddIfMissing(List<string> list, string value)
+        private static void AddIfMissing(List<BaseItemKind> list, BaseItemKind value)
         {
-            if (!list.Contains(value, StringComparer.OrdinalIgnoreCase))
+            if (!list.Contains(value))
             {
                 list.Add(value);
             }
@@ -86,63 +83,63 @@ namespace Emby.Server.Implementations.Library
             searchTerm = searchTerm.Trim().RemoveDiacritics();
 
             var excludeItemTypes = query.ExcludeItemTypes.ToList();
-            var includeItemTypes = (query.IncludeItemTypes ?? Array.Empty<string>()).ToList();
+            var includeItemTypes = (query.IncludeItemTypes ?? Array.Empty<BaseItemKind>()).ToList();
 
-            excludeItemTypes.Add(nameof(Year));
-            excludeItemTypes.Add(nameof(Folder));
+            excludeItemTypes.Add(BaseItemKind.Year);
+            excludeItemTypes.Add(BaseItemKind.Folder);
 
-            if (query.IncludeGenres && (includeItemTypes.Count == 0 || includeItemTypes.Contains("Genre", StringComparer.OrdinalIgnoreCase)))
+            if (query.IncludeGenres && (includeItemTypes.Count == 0 || includeItemTypes.Contains(BaseItemKind.Genre)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, nameof(Genre));
-                    AddIfMissing(includeItemTypes, nameof(MusicGenre));
+                    AddIfMissing(includeItemTypes, BaseItemKind.Genre);
+                    AddIfMissing(includeItemTypes, BaseItemKind.MusicGenre);
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, nameof(Genre));
-                AddIfMissing(excludeItemTypes, nameof(MusicGenre));
+                AddIfMissing(excludeItemTypes, BaseItemKind.Genre);
+                AddIfMissing(excludeItemTypes, BaseItemKind.MusicGenre);
             }
 
-            if (query.IncludePeople && (includeItemTypes.Count == 0 || includeItemTypes.Contains("People", StringComparer.OrdinalIgnoreCase) || includeItemTypes.Contains("Person", StringComparer.OrdinalIgnoreCase)))
+            if (query.IncludePeople && (includeItemTypes.Count == 0 || includeItemTypes.Contains(BaseItemKind.Person)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, nameof(Person));
+                    AddIfMissing(includeItemTypes, BaseItemKind.Person);
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, nameof(Person));
+                AddIfMissing(excludeItemTypes, BaseItemKind.Person);
             }
 
-            if (query.IncludeStudios && (includeItemTypes.Count == 0 || includeItemTypes.Contains("Studio", StringComparer.OrdinalIgnoreCase)))
+            if (query.IncludeStudios && (includeItemTypes.Count == 0 || includeItemTypes.Contains(BaseItemKind.Studio)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, nameof(Studio));
+                    AddIfMissing(includeItemTypes, BaseItemKind.Studio);
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, nameof(Studio));
+                AddIfMissing(excludeItemTypes, BaseItemKind.Studio);
             }
 
-            if (query.IncludeArtists && (includeItemTypes.Count == 0 || includeItemTypes.Contains("MusicArtist", StringComparer.OrdinalIgnoreCase)))
+            if (query.IncludeArtists && (includeItemTypes.Count == 0 || includeItemTypes.Contains(BaseItemKind.MusicArtist)))
             {
                 if (!query.IncludeMedia)
                 {
-                    AddIfMissing(includeItemTypes, nameof(MusicArtist));
+                    AddIfMissing(includeItemTypes, BaseItemKind.MusicArtist);
                 }
             }
             else
             {
-                AddIfMissing(excludeItemTypes, nameof(MusicArtist));
+                AddIfMissing(excludeItemTypes, BaseItemKind.MusicArtist);
             }
 
-            AddIfMissing(excludeItemTypes, nameof(CollectionFolder));
-            AddIfMissing(excludeItemTypes, nameof(Folder));
+            AddIfMissing(excludeItemTypes, BaseItemKind.CollectionFolder);
+            AddIfMissing(excludeItemTypes, BaseItemKind.Folder);
             var mediaTypes = query.MediaTypes.ToList();
 
             if (includeItemTypes.Count > 0)
@@ -183,7 +180,7 @@ namespace Emby.Server.Implementations.Library
 
             List<BaseItem> mediaItems;
 
-            if (searchQuery.IncludeItemTypes.Length == 1 && string.Equals(searchQuery.IncludeItemTypes[0], "MusicArtist", StringComparison.OrdinalIgnoreCase))
+            if (searchQuery.IncludeItemTypes.Length == 1 && searchQuery.IncludeItemTypes[0] == BaseItemKind.MusicArtist)
             {
                 if (!searchQuery.ParentId.Equals(Guid.Empty))
                 {
@@ -192,7 +189,7 @@ namespace Emby.Server.Implementations.Library
 
                 searchQuery.ParentId = Guid.Empty;
                 searchQuery.IncludeItemsByName = true;
-                searchQuery.IncludeItemTypes = Array.Empty<string>();
+                searchQuery.IncludeItemTypes = Array.Empty<BaseItemKind>();
                 mediaItems = _libraryManager.GetAllArtists(searchQuery).Items.Select(i => i.Item1).ToList();
             }
             else
diff --git a/Emby.Server.Implementations/Library/UserViewManager.cs b/Emby.Server.Implementations/Library/UserViewManager.cs
index 711647e7a..ab8bc6328 100644
--- a/Emby.Server.Implementations/Library/UserViewManager.cs
+++ b/Emby.Server.Implementations/Library/UserViewManager.cs
@@ -8,11 +8,11 @@ using System.Linq;
 using System.Threading;
 using Jellyfin.Data.Entities;
 using Jellyfin.Data.Enums;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Channels;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
 using MediaBrowser.Model.Channels;
@@ -20,8 +20,6 @@ using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Globalization;
 using MediaBrowser.Model.Library;
 using MediaBrowser.Model.Querying;
-using Genre = MediaBrowser.Controller.Entities.Genre;
-using Person = MediaBrowser.Controller.Entities.Person;
 
 namespace Emby.Server.Implementations.Library
 {
@@ -80,7 +78,7 @@ namespace Emby.Server.Implementations.Library
                     continue;
                 }
 
-                if (query.PresetViews.Contains(folderViewType ?? string.Empty, StringComparer.OrdinalIgnoreCase))
+                if (query.PresetViews.Contains(folderViewType ?? string.Empty, StringComparison.OrdinalIgnoreCase))
                 {
                     list.Add(GetUserView(folder, folderViewType, string.Empty));
                 }
@@ -180,7 +178,7 @@ namespace Emby.Server.Implementations.Library
         {
             if (parents.Count == 1 && parents.All(i => string.Equals(i.CollectionType, viewType, StringComparison.OrdinalIgnoreCase)))
             {
-                if (!presetViews.Contains(viewType, StringComparer.OrdinalIgnoreCase))
+                if (!presetViews.Contains(viewType, StringComparison.OrdinalIgnoreCase))
                 {
                     return (Folder)parents[0];
                 }
@@ -300,11 +298,11 @@ namespace Emby.Server.Implementations.Library
                 {
                     if (hasCollectionType.All(i => string.Equals(i.CollectionType, CollectionType.Movies, StringComparison.OrdinalIgnoreCase)))
                     {
-                        includeItemTypes = new string[] { "Movie" };
+                        includeItemTypes = new[] { BaseItemKind.Movie };
                     }
                     else if (hasCollectionType.All(i => string.Equals(i.CollectionType, CollectionType.TvShows, StringComparison.OrdinalIgnoreCase)))
                     {
-                        includeItemTypes = new string[] { "Episode" };
+                        includeItemTypes = new[] { BaseItemKind.Episode };
                     }
                 }
             }
@@ -344,13 +342,13 @@ namespace Emby.Server.Implementations.Library
             var excludeItemTypes = includeItemTypes.Length == 0 && mediaTypes.Count == 0
                 ? new[]
                 {
-                    nameof(Person),
-                    nameof(Studio),
-                    nameof(Year),
-                    nameof(MusicGenre),
-                    nameof(Genre)
+                    BaseItemKind.Person,
+                    BaseItemKind.Studio,
+                    BaseItemKind.Year,
+                    BaseItemKind.MusicGenre,
+                    BaseItemKind.Genre
                 }
-                : Array.Empty<string>();
+                : Array.Empty<BaseItemKind>();
 
             var query = new InternalItemsQuery(user)
             {
diff --git a/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs b/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
index 40436d9c5..7591e8391 100644
--- a/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/ArtistsValidator.cs
@@ -3,6 +3,7 @@ using System.Globalization;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Library;
@@ -81,7 +82,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { nameof(MusicArtist) },
+                IncludeItemTypes = new[] { BaseItemKind.MusicArtist },
                 IsDeadArtist = true,
                 IsLocked = false
             }).Cast<MusicArtist>().ToList();
diff --git a/Emby.Server.Implementations/Library/Validators/CollectionPostScanTask.cs b/Emby.Server.Implementations/Library/Validators/CollectionPostScanTask.cs
index 945b559ad..73e58d16c 100644
--- a/Emby.Server.Implementations/Library/Validators/CollectionPostScanTask.cs
+++ b/Emby.Server.Implementations/Library/Validators/CollectionPostScanTask.cs
@@ -64,7 +64,7 @@ namespace Emby.Server.Implementations.Library.Validators
                     var movies = _libraryManager.GetItemList(new InternalItemsQuery
                     {
                         MediaTypes = new string[] { MediaType.Video },
-                        IncludeItemTypes = new[] { nameof(Movie) },
+                        IncludeItemTypes = new[] { BaseItemKind.Movie },
                         IsVirtualItem = false,
                         OrderBy = new[] { (ItemSortBy.SortName, SortOrder.Ascending) },
                         Parent = library,
@@ -108,7 +108,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var boxSets = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { nameof(BoxSet) },
+                IncludeItemTypes = new[] { BaseItemKind.BoxSet },
                 CollapseBoxSetItems = false,
                 Recursive = true
             });
diff --git a/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs b/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
index 8a9a4b865..601aab5b9 100644
--- a/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/PeopleValidator.cs
@@ -2,6 +2,7 @@ using System;
 using System.Globalization;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Providers;
@@ -91,7 +92,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { nameof(Person) },
+                IncludeItemTypes = new[] { BaseItemKind.Person },
                 IsDeadPerson = true,
                 IsLocked = false
             });
diff --git a/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs b/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
index 8577d722e..26bc49c1f 100644
--- a/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
+++ b/Emby.Server.Implementations/Library/Validators/StudiosValidator.cs
@@ -2,6 +2,7 @@ using System;
 using System.Globalization;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Persistence;
@@ -80,7 +81,7 @@ namespace Emby.Server.Implementations.Library.Validators
 
             var deadEntities = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new[] { nameof(Studio) },
+                IncludeItemTypes = new[] { BaseItemKind.Studio },
                 IsDeadStudio = true,
                 IsLocked = false
             });
diff --git a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
index 644f9050d..7ef93d166 100644
--- a/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
+++ b/Emby.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
@@ -17,6 +17,7 @@ using System.Xml;
 using Emby.Server.Implementations.Library;
 using Jellyfin.Data.Enums;
 using Jellyfin.Data.Events;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Progress;
@@ -227,7 +228,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
             foreach (var virtualFolder in virtualFolders)
             {
-                if (!virtualFolder.Locations.Contains(path, StringComparer.OrdinalIgnoreCase))
+                if (!virtualFolder.Locations.Contains(path, StringComparison.OrdinalIgnoreCase))
                 {
                     continue;
                 }
@@ -891,7 +892,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 throw new ArgumentNullException(nameof(tunerHostId));
             }
 
-            return info.EnabledTuners.Contains(tunerHostId, StringComparer.OrdinalIgnoreCase);
+            return info.EnabledTuners.Contains(tunerHostId, StringComparison.OrdinalIgnoreCase);
         }
 
         public async Task<IEnumerable<ProgramInfo>> GetProgramsAsync(string channelId, DateTime startDateUtc, DateTime endDateUtc, CancellationToken cancellationToken)
@@ -1778,7 +1779,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
             {
                 var program = string.IsNullOrWhiteSpace(timer.ProgramId) ? null : _libraryManager.GetItemList(new InternalItemsQuery
                 {
-                    IncludeItemTypes = new[] { nameof(LiveTvProgram) },
+                    IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                     Limit = 1,
                     ExternalId = timer.ProgramId,
                     DtoOptions = new DtoOptions(true)
@@ -2137,7 +2138,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
         {
             var query = new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 Limit = 1,
                 DtoOptions = new DtoOptions(true)
                 {
@@ -2332,7 +2333,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 var deletes = _timerProvider.GetAll()
                     .Where(i => string.Equals(i.SeriesTimerId, seriesTimer.Id, StringComparison.OrdinalIgnoreCase))
-                    .Where(i => !allTimerIds.Contains(i.Id, StringComparer.OrdinalIgnoreCase) && i.StartDate > DateTime.UtcNow)
+                    .Where(i => !allTimerIds.Contains(i.Id, StringComparison.OrdinalIgnoreCase) && i.StartDate > DateTime.UtcNow)
                     .Where(i => deleteStatuses.Contains(i.Status))
                     .ToList();
 
@@ -2352,7 +2353,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
             var query = new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 ExternalSeriesId = seriesTimer.SeriesId,
                 DtoOptions = new DtoOptions(true)
                 {
@@ -2387,7 +2388,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                     channel = _libraryManager.GetItemList(
                         new InternalItemsQuery
                         {
-                            IncludeItemTypes = new string[] { nameof(LiveTvChannel) },
+                            IncludeItemTypes = new[] { BaseItemKind.LiveTvChannel },
                             ItemIds = new[] { parent.ChannelId },
                             DtoOptions = new DtoOptions()
                         }).FirstOrDefault() as LiveTvChannel;
@@ -2446,7 +2447,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                     channel = _libraryManager.GetItemList(
                         new InternalItemsQuery
                         {
-                            IncludeItemTypes = new string[] { nameof(LiveTvChannel) },
+                            IncludeItemTypes = new[] { BaseItemKind.LiveTvChannel },
                             ItemIds = new[] { programInfo.ChannelId },
                             DtoOptions = new DtoOptions()
                         }).FirstOrDefault() as LiveTvChannel;
@@ -2511,7 +2512,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 var seriesIds = _libraryManager.GetItemIds(
                     new InternalItemsQuery
                     {
-                        IncludeItemTypes = new[] { nameof(Series) },
+                        IncludeItemTypes = new[] { BaseItemKind.Series },
                         Name = program.Name
                     }).ToArray();
 
@@ -2524,7 +2525,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
                 {
                     var result = _libraryManager.GetItemIds(new InternalItemsQuery
                     {
-                        IncludeItemTypes = new[] { nameof(Episode) },
+                        IncludeItemTypes = new[] { BaseItemKind.Episode },
                         ParentIndexNumber = program.SeasonNumber.Value,
                         IndexNumber = program.EpisodeNumber.Value,
                         AncestorIds = seriesIds,
@@ -2621,7 +2622,7 @@ namespace Emby.Server.Implementations.LiveTv.EmbyTV
 
                 if (newDevicesOnly)
                 {
-                    discoveredDevices = discoveredDevices.Where(d => !configuredDeviceIds.Contains(d.DeviceId, StringComparer.OrdinalIgnoreCase))
+                    discoveredDevices = discoveredDevices.Where(d => !configuredDeviceIds.Contains(d.DeviceId, StringComparison.OrdinalIgnoreCase))
                             .ToList();
                 }
 
diff --git a/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs b/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
index 93d72dba4..dd0cb6c5d 100644
--- a/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
+++ b/Emby.Server.Implementations/LiveTv/Listings/SchedulesDirect.cs
@@ -10,7 +10,6 @@ using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Net.Http.Json;
-using System.Net.Http.Headers;
 using System.Net.Mime;
 using System.Security.Cryptography;
 using System.Text;
@@ -242,19 +241,19 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
             if (programInfo.AudioProperties.Count != 0)
             {
-                if (programInfo.AudioProperties.Contains("atmos", StringComparer.OrdinalIgnoreCase))
+                if (programInfo.AudioProperties.Contains("atmos", StringComparison.OrdinalIgnoreCase))
                 {
                     audioType = ProgramAudio.Atmos;
                 }
-                else if (programInfo.AudioProperties.Contains("dd 5.1", StringComparer.OrdinalIgnoreCase))
+                else if (programInfo.AudioProperties.Contains("dd 5.1", StringComparison.OrdinalIgnoreCase))
                 {
                     audioType = ProgramAudio.DolbyDigital;
                 }
-                else if (programInfo.AudioProperties.Contains("dd", StringComparer.OrdinalIgnoreCase))
+                else if (programInfo.AudioProperties.Contains("dd", StringComparison.OrdinalIgnoreCase))
                 {
                     audioType = ProgramAudio.DolbyDigital;
                 }
-                else if (programInfo.AudioProperties.Contains("stereo", StringComparer.OrdinalIgnoreCase))
+                else if (programInfo.AudioProperties.Contains("stereo", StringComparison.OrdinalIgnoreCase))
                 {
                     audioType = ProgramAudio.Stereo;
                 }
@@ -316,8 +315,8 @@ namespace Emby.Server.Implementations.LiveTv.Listings
 
             if (programInfo.VideoProperties != null)
             {
-                info.IsHD = programInfo.VideoProperties.Contains("hdtv", StringComparer.OrdinalIgnoreCase);
-                info.Is3D = programInfo.VideoProperties.Contains("3d", StringComparer.OrdinalIgnoreCase);
+                info.IsHD = programInfo.VideoProperties.Contains("hdtv", StringComparison.OrdinalIgnoreCase);
+                info.Is3D = programInfo.VideoProperties.Contains("3d", StringComparison.OrdinalIgnoreCase);
             }
 
             if (details.ContentRating != null && details.ContentRating.Count > 0)
@@ -326,7 +325,7 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                     .Replace("--", "-", StringComparison.Ordinal);
 
                 var invalid = new[] { "N/A", "Approved", "Not Rated", "Passed" };
-                if (invalid.Contains(info.OfficialRating, StringComparer.OrdinalIgnoreCase))
+                if (invalid.Contains(info.OfficialRating, StringComparison.OrdinalIgnoreCase))
                 {
                     info.OfficialRating = null;
                 }
@@ -388,9 +387,9 @@ namespace Emby.Server.Implementations.LiveTv.Listings
             if (details.Genres != null)
             {
                 info.Genres = details.Genres.Where(g => !string.IsNullOrWhiteSpace(g)).ToList();
-                info.IsNews = details.Genres.Contains("news", StringComparer.OrdinalIgnoreCase);
+                info.IsNews = details.Genres.Contains("news", StringComparison.OrdinalIgnoreCase);
 
-                if (info.Genres.Contains("children", StringComparer.OrdinalIgnoreCase))
+                if (info.Genres.Contains("children", StringComparison.OrdinalIgnoreCase))
                 {
                     info.IsKids = true;
                 }
diff --git a/Emby.Server.Implementations/LiveTv/Listings/XmlTvListingsProvider.cs b/Emby.Server.Implementations/LiveTv/Listings/XmlTvListingsProvider.cs
index 0c0ec48d9..3da9d02b8 100644
--- a/Emby.Server.Implementations/LiveTv/Listings/XmlTvListingsProvider.cs
+++ b/Emby.Server.Implementations/LiveTv/Listings/XmlTvListingsProvider.cs
@@ -190,10 +190,10 @@ namespace Emby.Server.Implementations.LiveTv.Listings
                 IsSeries = program.Episode != null,
                 IsRepeat = program.IsPreviouslyShown && !program.IsNew,
                 IsPremiere = program.Premiere != null,
-                IsKids = program.Categories.Any(c => info.KidsCategories.Contains(c, StringComparer.OrdinalIgnoreCase)),
-                IsMovie = program.Categories.Any(c => info.MovieCategories.Contains(c, StringComparer.OrdinalIgnoreCase)),
-                IsNews = program.Categories.Any(c => info.NewsCategories.Contains(c, StringComparer.OrdinalIgnoreCase)),
-                IsSports = program.Categories.Any(c => info.SportsCategories.Contains(c, StringComparer.OrdinalIgnoreCase)),
+                IsKids = program.Categories.Any(c => info.KidsCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
+                IsMovie = program.Categories.Any(c => info.MovieCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
+                IsNews = program.Categories.Any(c => info.NewsCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
+                IsSports = program.Categories.Any(c => info.SportsCategories.Contains(c, StringComparison.OrdinalIgnoreCase)),
                 ImageUrl = program.Icon != null && !string.IsNullOrEmpty(program.Icon.Source) ? program.Icon.Source : null,
                 HasImage = program.Icon != null && !string.IsNullOrEmpty(program.Icon.Source),
                 OfficialRating = program.Rating != null && !string.IsNullOrEmpty(program.Rating.Value) ? program.Rating.Value : null,
diff --git a/Emby.Server.Implementations/LiveTv/LiveTvDtoService.cs b/Emby.Server.Implementations/LiveTv/LiveTvDtoService.cs
index 598e3f88a..323b96021 100644
--- a/Emby.Server.Implementations/LiveTv/LiveTvDtoService.cs
+++ b/Emby.Server.Implementations/LiveTv/LiveTvDtoService.cs
@@ -7,12 +7,12 @@ using System.Globalization;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Common;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Controller.Drawing;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
-using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.LiveTv;
 using MediaBrowser.Model.Dto;
@@ -161,7 +161,7 @@ namespace Emby.Server.Implementations.LiveTv
         {
             var librarySeries = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(Series) },
+                IncludeItemTypes = new[] { BaseItemKind.Series },
                 Name = seriesName,
                 Limit = 1,
                 ImageTypes = new ImageType[] { ImageType.Thumb },
@@ -204,7 +204,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var program = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 ExternalSeriesId = programSeriesId,
                 Limit = 1,
                 ImageTypes = new ImageType[] { ImageType.Primary },
@@ -255,7 +255,7 @@ namespace Emby.Server.Implementations.LiveTv
         {
             var librarySeries = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(Series) },
+                IncludeItemTypes = new[] { BaseItemKind.Series },
                 Name = seriesName,
                 Limit = 1,
                 ImageTypes = new ImageType[] { ImageType.Thumb },
@@ -298,7 +298,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var program = _libraryManager.GetItemList(new InternalItemsQuery
             {
-                IncludeItemTypes = new string[] { nameof(Series) },
+                IncludeItemTypes = new[] { BaseItemKind.Series },
                 Name = seriesName,
                 Limit = 1,
                 ImageTypes = new ImageType[] { ImageType.Primary },
@@ -309,7 +309,7 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 program = _libraryManager.GetItemList(new InternalItemsQuery
                 {
-                    IncludeItemTypes = new string[] { nameof(LiveTvProgram) },
+                    IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                     ExternalSeriesId = programSeriesId,
                     Limit = 1,
                     ImageTypes = new ImageType[] { ImageType.Primary },
diff --git a/Emby.Server.Implementations/LiveTv/LiveTvManager.cs b/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
index a41b63f28..047d8e98c 100644
--- a/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
+++ b/Emby.Server.Implementations/LiveTv/LiveTvManager.cs
@@ -33,8 +33,6 @@ using MediaBrowser.Model.LiveTv;
 using MediaBrowser.Model.Querying;
 using MediaBrowser.Model.Tasks;
 using Microsoft.Extensions.Logging;
-using Episode = MediaBrowser.Controller.Entities.TV.Episode;
-using Movie = MediaBrowser.Controller.Entities.Movies.Movie;
 
 namespace Emby.Server.Implementations.LiveTv
 {
@@ -191,7 +189,7 @@ namespace Emby.Server.Implementations.LiveTv
                 IsKids = query.IsKids,
                 IsSports = query.IsSports,
                 IsSeries = query.IsSeries,
-                IncludeItemTypes = new[] { nameof(LiveTvChannel) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvChannel },
                 TopParentIds = new[] { topFolder.Id },
                 IsFavorite = query.IsFavorite,
                 IsLiked = query.IsLiked,
@@ -810,7 +808,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var internalQuery = new InternalItemsQuery(user)
             {
-                IncludeItemTypes = new[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 MinEndDate = query.MinEndDate,
                 MinStartDate = query.MinStartDate,
                 MaxEndDate = query.MaxEndDate,
@@ -874,7 +872,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var internalQuery = new InternalItemsQuery(user)
             {
-                IncludeItemTypes = new[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 IsAiring = query.IsAiring,
                 HasAired = query.HasAired,
                 IsNews = query.IsNews,
@@ -1085,8 +1083,8 @@ namespace Emby.Server.Implementations.LiveTv
 
             if (cleanDatabase)
             {
-                CleanDatabaseInternal(newChannelIdList.ToArray(), new[] { nameof(LiveTvChannel) }, progress, cancellationToken);
-                CleanDatabaseInternal(newProgramIdList.ToArray(), new[] { nameof(LiveTvProgram) }, progress, cancellationToken);
+                CleanDatabaseInternal(newChannelIdList.ToArray(), new[] { BaseItemKind.LiveTvChannel }, progress, cancellationToken);
+                CleanDatabaseInternal(newProgramIdList.ToArray(), new[] { BaseItemKind.LiveTvProgram }, progress, cancellationToken);
             }
 
             var coreService = _services.OfType<EmbyTV.EmbyTV>().FirstOrDefault();
@@ -1177,7 +1175,7 @@ namespace Emby.Server.Implementations.LiveTv
 
                     var existingPrograms = _libraryManager.GetItemList(new InternalItemsQuery
                     {
-                        IncludeItemTypes = new string[] { nameof(LiveTvProgram) },
+                        IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                         ChannelIds = new Guid[] { currentChannel.Id },
                         DtoOptions = new DtoOptions(true)
                     }).Cast<LiveTvProgram>().ToDictionary(i => i.Id);
@@ -1261,7 +1259,7 @@ namespace Emby.Server.Implementations.LiveTv
             return new Tuple<List<Guid>, List<Guid>>(channels, programs);
         }
 
-        private void CleanDatabaseInternal(Guid[] currentIdList, string[] validTypes, IProgress<double> progress, CancellationToken cancellationToken)
+        private void CleanDatabaseInternal(Guid[] currentIdList, BaseItemKind[] validTypes, IProgress<double> progress, CancellationToken cancellationToken)
         {
             var list = _itemRepo.GetItemIdsList(new InternalItemsQuery
             {
@@ -1328,25 +1326,25 @@ namespace Emby.Server.Implementations.LiveTv
                 .Select(i => i.Id)
                 .ToList();
 
-            var excludeItemTypes = new List<string>();
+            var excludeItemTypes = new List<BaseItemKind>();
 
             if (folderIds.Count == 0)
             {
                 return new QueryResult<BaseItem>();
             }
 
-            var includeItemTypes = new List<string>();
+            var includeItemTypes = new List<BaseItemKind>();
             var genres = new List<string>();
 
             if (query.IsMovie.HasValue)
             {
                 if (query.IsMovie.Value)
                 {
-                    includeItemTypes.Add(nameof(Movie));
+                    includeItemTypes.Add(BaseItemKind.Movie);
                 }
                 else
                 {
-                    excludeItemTypes.Add(nameof(Movie));
+                    excludeItemTypes.Add(BaseItemKind.Movie);
                 }
             }
 
@@ -1354,11 +1352,11 @@ namespace Emby.Server.Implementations.LiveTv
             {
                 if (query.IsSeries.Value)
                 {
-                    includeItemTypes.Add(nameof(Episode));
+                    includeItemTypes.Add(BaseItemKind.Episode);
                 }
                 else
                 {
-                    excludeItemTypes.Add(nameof(Episode));
+                    excludeItemTypes.Add(BaseItemKind.Episode);
                 }
             }
 
@@ -1878,7 +1876,7 @@ namespace Emby.Server.Implementations.LiveTv
 
             var programs = options.AddCurrentProgram ? _libraryManager.GetItemList(new InternalItemsQuery(user)
             {
-                IncludeItemTypes = new[] { nameof(LiveTvProgram) },
+                IncludeItemTypes = new[] { BaseItemKind.LiveTvProgram },
                 ChannelIds = channelIds,
                 MaxStartDate = now,
                 MinEndDate = now,
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs
index 9fba17ca3..1f02acfa3 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/HdHomerun/HdHomerunUdpStream.cs
@@ -3,7 +3,6 @@
 #pragma warning disable CS1591
 
 using System;
-using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Net;
diff --git a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
index 08b9260b9..99486f25c 100644
--- a/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
+++ b/Emby.Server.Implementations/LiveTv/TunerHosts/M3UTunerHost.cs
@@ -10,6 +10,7 @@ using System.Linq;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Extensions;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller;
@@ -119,7 +120,7 @@ namespace Emby.Server.Implementations.LiveTv.TunerHosts
             {
                 var extension = Path.GetExtension(mediaSource.Path) ?? string.Empty;
 
-                if (!_disallowedSharedStreamExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase))
+                if (!_disallowedSharedStreamExtensions.Contains(extension, StringComparison.OrdinalIgnoreCase))
                 {
                     return new SharedHttpStream(mediaSource, tunerHost, streamId, FileSystem, _httpClientFactory, Logger, Config, _appHost, _streamHelper);
                 }
diff --git a/Emby.Server.Implementations/Localization/Core/cy.json b/Emby.Server.Implementations/Localization/Core/cy.json
index 0fa72dea4..1192f5c88 100644
--- a/Emby.Server.Implementations/Localization/Core/cy.json
+++ b/Emby.Server.Implementations/Localization/Core/cy.json
@@ -10,5 +10,49 @@
     "AuthenticationSucceededWithUserName": "{0} wedi’i ddilysu’n llwyddiannus",
     "Artists": "Artistiaid",
     "AppDeviceValues": "Ap: {0}, Dyfais: {1}",
-    "Albums": "Albwmau"
+    "Albums": "Albwmau",
+    "Genres": "Genres",
+    "Folders": "Ffolderi",
+    "Favorites": "Ffefrynnau",
+    "LabelRunningTimeValue": "Amser rhedeg: {0}",
+    "TaskOptimizeDatabase": "Cronfa ddata Optimeiddio",
+    "TaskRefreshChannels": "Adnewyddu Sianeli",
+    "TaskRefreshPeople": "Adnewyddu Pobl",
+    "TasksChannelsCategory": "Sianeli Internet",
+    "VersionNumber": "Fersiwn {0}",
+    "ScheduledTaskStartedWithName": "{0} wedi dechrau",
+    "ScheduledTaskFailedWithName": "{0} wedi methu",
+    "ProviderValue": "Darparwr: {0}",
+    "NotificationOptionInstallationFailed": "Fethu Gosod",
+    "NameSeasonUnknown": "Tymor Anhysbys",
+    "NameSeasonNumber": "Tymor {0}",
+    "MusicVideos": "Fideos Cerddoriaeth",
+    "MixedContent": "Cynnwys amrywiol",
+    "HomeVideos": "Fideos Cartref",
+    "HeaderNextUp": "Nesaf i Fyny",
+    "HeaderFavoriteArtists": "Ffefryn Artistiaid",
+    "HeaderFavoriteAlbums": "Ffefryn Albwmau",
+    "HeaderContinueWatching": "Parhewch i Weithio",
+    "TasksApplicationCategory": "Rhaglen",
+    "TasksLibraryCategory": "Llyfrgell",
+    "TasksMaintenanceCategory": "Cynnal a Chadw",
+    "System": "System",
+    "Plugin": "Ategyn",
+    "Music": "Cerddoriaeth",
+    "Latest": "Diweddaraf",
+    "Inherit": "Etifeddu",
+    "Forced": "Orfodi",
+    "Application": "Rhaglen",
+    "HeaderAlbumArtists": "Artistiaid albwm",
+    "Sync": "Cysoni",
+    "Songs": "Caneuon",
+    "Shows": "Rhaglenni",
+    "Playlists": "Rhestri Chwarae",
+    "Photos": "Lluniau",
+    "ValueSpecialEpisodeName": "Arbennig - {0}",
+    "Movies": "Ffilmiau",
+    "Undefined": "Heb ddiffiniad",
+    "TvShows": "Rhaglenni teledu",
+    "HeaderLiveTV": "Teledu Byw",
+    "User": "Defnyddiwr"
 }
diff --git a/Emby.Server.Implementations/Localization/Core/fil.json b/Emby.Server.Implementations/Localization/Core/fil.json
index f18a1c030..99839ae6e 100644
--- a/Emby.Server.Implementations/Localization/Core/fil.json
+++ b/Emby.Server.Implementations/Localization/Core/fil.json
@@ -117,5 +117,7 @@
     "TaskCleanActivityLogDescription": "Tanggalin ang mga tala ng aktibidad na mas luma sa nakatakda na edad.",
     "Default": "Default",
     "Undefined": "Hindi tiyak",
-    "Forced": "Sapilitan"
+    "Forced": "Sapilitan",
+    "TaskOptimizeDatabaseDescription": "Iko-compact ang database at ita-truncate ang free space. Ang pagpapatakbo ng gawaing ito pagkatapos ng pag-scan sa library o paggawa ng iba pang mga pagbabago na nagpapahiwatig ng mga pagbabago sa database ay maaaring magpa-improve ng performance.",
+    "TaskOptimizeDatabase": "I-optimize ang database"
 }
diff --git a/Emby.Server.Implementations/Localization/Core/ms.json b/Emby.Server.Implementations/Localization/Core/ms.json
index 2e0fbc366..deb28970c 100644
--- a/Emby.Server.Implementations/Localization/Core/ms.json
+++ b/Emby.Server.Implementations/Localization/Core/ms.json
@@ -2,7 +2,7 @@
     "Albums": "Album-album",
     "AppDeviceValues": "Apl: {0}, Peranti: {1}",
     "Application": "Aplikasi",
-    "Artists": "Artis",
+    "Artists": "Artis-artis",
     "AuthenticationSucceededWithUserName": "{0} berjaya disahkan",
     "Books": "Buku-buku",
     "CameraImageUploadedFrom": "Gambar baharu telah dimuat naik melalui {0}",
@@ -39,7 +39,7 @@
     "MixedContent": "Kandungan campuran",
     "Movies": "Filem-filem",
     "Music": "Muzik",
-    "MusicVideos": "",
+    "MusicVideos": "Video muzik",
     "NameInstallFailed": "{0} pemasangan gagal",
     "NameSeasonNumber": "Musim {0}",
     "NameSeasonUnknown": "Musim Tidak Diketahui",
@@ -75,7 +75,7 @@
     "StartupEmbyServerIsLoading": "Pelayan Jellyfin sedang dimuatkan. Sila cuba sebentar lagi.",
     "SubtitleDownloadFailureForItem": "Subtitles failed to download for {0}",
     "SubtitleDownloadFailureFromForItem": "Muat turun sarikata gagal dari {0} untuk {1}",
-    "Sync": "",
+    "Sync": "Segerak",
     "System": "Sistem",
     "TvShows": "Tayangan TV",
     "User": "Pengguna",
diff --git a/Emby.Server.Implementations/Localization/Core/ta.json b/Emby.Server.Implementations/Localization/Core/ta.json
index e3a993625..98d763fcd 100644
--- a/Emby.Server.Implementations/Localization/Core/ta.json
+++ b/Emby.Server.Implementations/Localization/Core/ta.json
@@ -21,7 +21,7 @@
     "Inherit": "மரபுரிமையாகப் பெறு",
     "HeaderRecordingGroups": "பதிவு குழுக்கள்",
     "Folders": "கோப்புறைகள்",
-    "FailedLoginAttemptWithUserName": "{0} இல் இருந்து உள்நுழைவு முயற்சி தோல்வியடைந்தது",
+    "FailedLoginAttemptWithUserName": "{0} இன் உள்நுழைவு முயற்சி தோல்வியடைந்தது",
     "DeviceOnlineWithName": "{0} இணைக்கப்பட்டது",
     "DeviceOfflineWithName": "{0} துண்டிக்கப்பட்டது",
     "Collections": "தொகுப்புகள்",
diff --git a/Emby.Server.Implementations/Localization/LocalizationManager.cs b/Emby.Server.Implementations/Localization/LocalizationManager.cs
index 9cdbbb6a3..dbd70342a 100644
--- a/Emby.Server.Implementations/Localization/LocalizationManager.cs
+++ b/Emby.Server.Implementations/Localization/LocalizationManager.cs
@@ -310,7 +310,7 @@ namespace Emby.Server.Implementations.Localization
 
             return _dictionaries.GetOrAdd(
                 culture,
-                (key, localizationManager) => localizationManager.GetDictionary(Prefix, key, DefaultCulture + ".json").GetAwaiter().GetResult(),
+                static (key, localizationManager) => localizationManager.GetDictionary(Prefix, key, DefaultCulture + ".json").GetAwaiter().GetResult(),
                 this);
         }
 
diff --git a/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs b/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
index ac6606d39..6e1dc725d 100644
--- a/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
+++ b/Emby.Server.Implementations/MediaEncoder/EncodingManager.cs
@@ -9,6 +9,7 @@ using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Extensions;
 using MediaBrowser.Controller.Chapters;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Library;
@@ -120,7 +121,7 @@ namespace Emby.Server.Implementations.MediaEncoder
 
                 var path = GetChapterImagePath(video, chapter.StartPositionTicks);
 
-                if (!currentImages.Contains(path, StringComparer.OrdinalIgnoreCase))
+                if (!currentImages.Contains(path, StringComparison.OrdinalIgnoreCase))
                 {
                     if (extractImages)
                     {
@@ -219,7 +220,7 @@ namespace Emby.Server.Implementations.MediaEncoder
         {
             var deadImages = images
                 .Except(chapters.Select(i => i.ImagePath).Where(i => !string.IsNullOrEmpty(i)), StringComparer.OrdinalIgnoreCase)
-                .Where(i => BaseItem.SupportedImageExtensions.Contains(Path.GetExtension(i), StringComparer.OrdinalIgnoreCase))
+                .Where(i => BaseItem.SupportedImageExtensions.Contains(Path.GetExtension(i), StringComparison.OrdinalIgnoreCase))
                 .ToList();
 
             foreach (var image in deadImages)
diff --git a/Emby.Server.Implementations/Playlists/PlaylistsFolder.cs b/Emby.Server.Implementations/Playlists/PlaylistsFolder.cs
index 8b1cee89d..8ec9f6161 100644
--- a/Emby.Server.Implementations/Playlists/PlaylistsFolder.cs
+++ b/Emby.Server.Implementations/Playlists/PlaylistsFolder.cs
@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json.Serialization;
 using Jellyfin.Data.Entities;
+using Jellyfin.Data.Enums;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Playlists;
 using MediaBrowser.Model.Querying;
@@ -45,7 +46,7 @@ namespace Emby.Server.Implementations.Playlists
             }
 
             query.Recursive = true;
-            query.IncludeItemTypes = new[] { "Playlist" };
+            query.IncludeItemTypes = new[] { BaseItemKind.Playlist };
             query.Parent = null;
             return LibraryManager.GetItemsResult(query);
         }
diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
index 09ea6271d..8b185419f 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/ChapterImagesTask.cs
@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Jellyfin.Extensions;
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
@@ -143,7 +144,7 @@ namespace Emby.Server.Implementations.ScheduledTasks
 
                 var key = video.Path + video.DateModified.Ticks;
 
-                var extract = !previouslyFailedImages.Contains(key, StringComparer.OrdinalIgnoreCase);
+                var extract = !previouslyFailedImages.Contains(key, StringComparison.OrdinalIgnoreCase);
 
                 try
                 {
diff --git a/Emby.Server.Implementations/Serialization/MyXmlSerializer.cs b/Emby.Server.Implementations/Serialization/MyXmlSerializer.cs
index 059211a0b..1bac2600c 100644
--- a/Emby.Server.Implementations/Serialization/MyXmlSerializer.cs
+++ b/Emby.Server.Implementations/Serialization/MyXmlSerializer.cs
@@ -21,7 +21,7 @@ namespace Emby.Server.Implementations.Serialization
         private static XmlSerializer GetSerializer(Type type)
             => _serializers.GetOrAdd(
                 type.FullName ?? throw new ArgumentException($"Invalid type {type}."),
-                (_, t) => new XmlSerializer(t),
+                static (_, t) => new XmlSerializer(t),
                 type);
 
         /// <summary>
diff --git a/Emby.Server.Implementations/Session/SessionManager.cs b/Emby.Server.Implementations/Session/SessionManager.cs
index 341d2c8e6..d10a24bbc 100644
--- a/Emby.Server.Implementations/Session/SessionManager.cs
+++ b/Emby.Server.Implementations/Session/SessionManager.cs
@@ -1292,7 +1292,7 @@ namespace Emby.Server.Implementations.Session
                 {
                     ["ItemId"] = command.ItemId,
                     ["ItemName"] = command.ItemName,
-                    ["ItemType"] = command.ItemType
+                    ["ItemType"] = command.ItemType.ToString()
                 }
             };
 
diff --git a/Emby.Server.Implementations/TV/TVSeriesManager.cs b/Emby.Server.Implementations/TV/TVSeriesManager.cs
index 4d990c871..a87831294 100644
--- a/Emby.Server.Implementations/TV/TVSeriesManager.cs
+++ b/Emby.Server.Implementations/TV/TVSeriesManager.cs
@@ -116,7 +116,7 @@ namespace Emby.Server.Implementations.TV
                 .GetItemList(
                     new InternalItemsQuery(user)
                     {
-                        IncludeItemTypes = new[] { nameof(Episode) },
+                        IncludeItemTypes = new[] { BaseItemKind.Episode },
                         OrderBy = new[] { new ValueTuple<string, SortOrder>(ItemSortBy.DatePlayed, SortOrder.Descending) },
                         SeriesPresentationUniqueKey = presentationUniqueKey,
                         Limit = limit,
@@ -191,7 +191,7 @@ namespace Emby.Server.Implementations.TV
             {
                 AncestorWithPresentationUniqueKey = null,
                 SeriesPresentationUniqueKey = seriesKey,
-                IncludeItemTypes = new[] { nameof(Episode) },
+                IncludeItemTypes = new[] { BaseItemKind.Episode },
                 OrderBy = new[] { new ValueTuple<string, SortOrder>(ItemSortBy.SortName, SortOrder.Descending) },
                 IsPlayed = true,
                 Limit = 1,
@@ -209,7 +209,7 @@ namespace Emby.Server.Implementations.TV
                 {
                     AncestorWithPresentationUniqueKey = null,
                     SeriesPresentationUniqueKey = seriesKey,
-                    IncludeItemTypes = new[] { nameof(Episode) },
+                    IncludeItemTypes = new[] { BaseItemKind.Episode },
                     OrderBy = new[] { new ValueTuple<string, SortOrder>(ItemSortBy.SortName, SortOrder.Ascending) },
                     Limit = 1,
                     IsPlayed = false,
@@ -226,7 +226,7 @@ namespace Emby.Server.Implementations.TV
                         AncestorWithPresentationUniqueKey = null,
                         SeriesPresentationUniqueKey = seriesKey,
                         ParentIndexNumber = 0,
-                        IncludeItemTypes = new[] { nameof(Episode) },
+                        IncludeItemTypes = new[] { BaseItemKind.Episode },
                         IsPlayed = false,
                         IsVirtualItem = false,
                         DtoOptions = dtoOptions
diff --git a/Emby.Server.Implementations/Updates/InstallationManager.cs b/Emby.Server.Implementations/Updates/InstallationManager.cs
index ef95ebf94..24d592525 100644
--- a/Emby.Server.Implementations/Updates/InstallationManager.cs
+++ b/Emby.Server.Implementations/Updates/InstallationManager.cs
@@ -2,6 +2,7 @@ using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.IO;
+using System.IO.Compression;
 using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Json;
@@ -19,7 +20,6 @@ using MediaBrowser.Controller;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.Events;
 using MediaBrowser.Controller.Events.Updates;
-using MediaBrowser.Model.IO;
 using MediaBrowser.Model.Plugins;
 using MediaBrowser.Model.Updates;
 using Microsoft.Extensions.Logging;
@@ -47,7 +47,6 @@ namespace Emby.Server.Implementations.Updates
         /// </summary>
         /// <value>The application host.</value>
         private readonly IServerApplicationHost _applicationHost;
-        private readonly IZipClient _zipClient;
         private readonly object _currentInstallationsLock = new object();
 
         /// <summary>
@@ -69,7 +68,6 @@ namespace Emby.Server.Implementations.Updates
         /// <param name="eventManager">The <see cref="IEventManager"/>.</param>
         /// <param name="httpClientFactory">The <see cref="IHttpClientFactory"/>.</param>
         /// <param name="config">The <see cref="IServerConfigurationManager"/>.</param>
-        /// <param name="zipClient">The <see cref="IZipClient"/>.</param>
         /// <param name="pluginManager">The <see cref="IPluginManager"/>.</param>
         public InstallationManager(
             ILogger<InstallationManager> logger,
@@ -78,7 +76,6 @@ namespace Emby.Server.Implementations.Updates
             IEventManager eventManager,
             IHttpClientFactory httpClientFactory,
             IServerConfigurationManager config,
-            IZipClient zipClient,
             IPluginManager pluginManager)
         {
             _currentInstallations = new List<(InstallationInfo, CancellationTokenSource)>();
@@ -90,7 +87,6 @@ namespace Emby.Server.Implementations.Updates
             _eventManager = eventManager;
             _httpClientFactory = httpClientFactory;
             _config = config;
-            _zipClient = zipClient;
             _jsonSerializerOptions = JsonDefaults.Options;
             _pluginManager = pluginManager;
         }
@@ -560,7 +556,8 @@ namespace Emby.Server.Implementations.Updates
             }
 
             stream.Position = 0;
-            _zipClient.ExtractAllFromZip(stream, targetDir, true);
+            using var reader = new ZipArchive(stream);
+            reader.ExtractToDirectory(targetDir, true);
             await _pluginManager.GenerateManifest(package.PackageInfo, package.Version, targetDir, status).ConfigureAwait(false);
             _pluginManager.ImportPluginFrom(targetDir);
         }