Remove more and more warnings

5 files changed, 18 insertions, 16 deletions

diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs
index 067fecd87..3b182f7c9 100644
--- a/MediaBrowser.Controller/Entities/BaseItem.cs
+++ b/MediaBrowser.Controller/Entities/BaseItem.cs
@@ -112,7 +112,7 @@ namespace MediaBrowser.Controller.Entities
 
         private string _name;
 
-        public static char SlugChar = '-';
+        public const char SlugChar = '-';
 
         protected BaseItem()
         {
@@ -2050,7 +2050,7 @@ namespace MediaBrowser.Controller.Entities
 
         public virtual string GetClientTypeName()
         {
-            if (IsFolder && SourceType == SourceType.Channel && !(this is Channel))
+            if (IsFolder && SourceType == SourceType.Channel && this is not Channel)
             {
                 return "ChannelFolderItem";
             }
diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index d45a02cf2..dd08c31ed 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -233,7 +233,7 @@ namespace MediaBrowser.Controller.Entities
 
         public override bool IsVisible(User user)
         {
-            if (this is ICollectionFolder && !(this is BasePluginFolder))
+            if (this is ICollectionFolder && this is not BasePluginFolder)
             {
                 var blockedMediaFolders = user.GetPreferenceValues<Guid>(PreferenceKind.BlockedMediaFolders);
                 if (blockedMediaFolders.Length > 0)
@@ -673,7 +673,7 @@ namespace MediaBrowser.Controller.Entities
         {
             if (LinkedChildren.Length > 0)
             {
-                if (!(this is ICollectionFolder))
+                if (this is not ICollectionFolder)
                 {
                     return GetChildren(user, true).Count;
                 }
@@ -730,7 +730,7 @@ namespace MediaBrowser.Controller.Entities
                 return PostFilterAndSort(items, query, true);
             }
 
-            if (!(this is UserRootFolder) && !(this is AggregateFolder) && query.ParentId == Guid.Empty)
+            if (this is not UserRootFolder && this is not AggregateFolder && query.ParentId == Guid.Empty)
             {
                 query.Parent = this;
             }
@@ -805,7 +805,7 @@ namespace MediaBrowser.Controller.Entities
         {
             if (LinkedChildren.Length > 0)
             {
-                if (!(this is ICollectionFolder))
+                if (this is not ICollectionFolder)
                 {
                     Logger.LogDebug("Query requires post-filtering due to LinkedChildren. Type: " + GetType().Name);
                     return true;
@@ -1545,7 +1545,7 @@ namespace MediaBrowser.Controller.Entities
 
                 var childOwner = child.GetOwner() ?? child;
 
-                if (childOwner != null && !(child is IItemByName))
+                if (child is not IItemByName)
                 {
                     var childProtocol = childOwner.PathProtocol;
                     if (!childProtocol.HasValue || childProtocol.Value != Model.MediaInfo.MediaProtocol.File)
diff --git a/MediaBrowser.Controller/Entities/TV/Series.cs b/MediaBrowser.Controller/Entities/TV/Series.cs
index beda504b9..e4933e968 100644
--- a/MediaBrowser.Controller/Entities/TV/Series.cs
+++ b/MediaBrowser.Controller/Entities/TV/Series.cs
@@ -296,7 +296,7 @@ namespace MediaBrowser.Controller.Entities.TV
             // Refresh seasons
             foreach (var item in items)
             {
-                if (!(item is Season))
+                if (item is not Season)
                 {
                     continue;
                 }
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
index 141bb91c5..3e577ebb7 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs
@@ -504,7 +504,9 @@ namespace MediaBrowser.Controller.MediaEncoding
             var arg = new StringBuilder();
             var videoDecoder = GetHardwareAcceleratedVideoDecoder(state, encodingOptions) ?? string.Empty;
             var outputVideoCodec = GetVideoEncoder(state, encodingOptions) ?? string.Empty;
+#pragma warning disable CA1508 // Defaults to string.Empty
             var isSwDecoder = string.IsNullOrEmpty(videoDecoder);
+#pragma warning restore CA1508
             var isD3d11vaDecoder = videoDecoder.IndexOf("d3d11va", StringComparison.OrdinalIgnoreCase) != -1;
             var isVaapiDecoder = videoDecoder.IndexOf("vaapi", StringComparison.OrdinalIgnoreCase) != -1;
             var isVaapiEncoder = outputVideoCodec.IndexOf("vaapi", StringComparison.OrdinalIgnoreCase) != -1;
@@ -1759,7 +1761,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
             var request = state.BaseRequest;
 
-            var inputChannels = audioStream?.Channels;
+            var inputChannels = audioStream.Channels;
 
             if (inputChannels <= 0)
             {
@@ -2027,8 +2029,8 @@ namespace MediaBrowser.Controller.MediaEncoding
             {
                 // Adjust the size of graphical subtitles to fit the video stream.
                 var videoStream = state.VideoStream;
-                var inputWidth = videoStream?.Width;
-                var inputHeight = videoStream?.Height;
+                var inputWidth = videoStream.Width;
+                var inputHeight = videoStream.Height;
                 var (width, height) = GetFixedOutputSize(inputWidth, inputHeight, request.Width, request.Height, request.MaxWidth, request.MaxHeight);
 
                 if (width.HasValue && height.HasValue)
@@ -3101,7 +3103,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 inputModifier += " " + videoDecoder;
 
                 if (!IsCopyCodec(state.OutputVideoCodec)
-                    && (videoDecoder ?? string.Empty).IndexOf("cuvid", StringComparison.OrdinalIgnoreCase) != -1)
+                    && videoDecoder.IndexOf("cuvid", StringComparison.OrdinalIgnoreCase) != -1)
                 {
                     var videoStream = state.VideoStream;
                     var inputWidth = videoStream?.Width;
@@ -3110,7 +3112,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                     var (width, height) = GetFixedOutputSize(inputWidth, inputHeight, request.Width, request.Height, request.MaxWidth, request.MaxHeight);
 
-                    if ((videoDecoder ?? string.Empty).IndexOf("cuvid", StringComparison.OrdinalIgnoreCase) != -1
+                    if (videoDecoder.IndexOf("cuvid", StringComparison.OrdinalIgnoreCase) != -1
                         && width.HasValue
                         && height.HasValue)
                     {
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
index fa9f40d60..b09b7dba6 100644
--- a/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
+++ b/MediaBrowser.Controller/MediaEncoding/EncodingJobInfo.cs
@@ -422,7 +422,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                 if (EncodingHelper.IsCopyCodec(OutputVideoCodec))
                 {
-                    return VideoStream?.Codec;
+                    return VideoStream.Codec;
                 }
 
                 return OutputVideoCodec;
@@ -440,7 +440,7 @@ namespace MediaBrowser.Controller.MediaEncoding
 
                 if (EncodingHelper.IsCopyCodec(OutputAudioCodec))
                 {
-                    return AudioStream?.Codec;
+                    return AudioStream.Codec;
                 }
 
                 return OutputAudioCodec;
@@ -568,7 +568,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                 }
             }
 
-            return forceDeinterlaceIfSourceIsInterlaced && isInputInterlaced;
+            return forceDeinterlaceIfSourceIsInterlaced;
         }
 
         public string[] GetRequestedProfiles(string codec)