2 files changed, 4 insertions, 3 deletions
diff --git a/Jellyfin.Api/Controllers/LibraryController.cs b/Jellyfin.Api/Controllers/LibraryController.cs
index 4eb979d838..f1b9c2f671 100644
--- a/Jellyfin.Api/Controllers/LibraryController.cs
+++ b/Jellyfin.Api/Controllers/LibraryController.cs
@@ -732,7 +732,7 @@ namespace Jellyfin.Api.Controllers
             else
             {
                 // For non series and movie types these columns are typically null
-                isSeries = null;
+                // isSeries = null;
                 isMovie = null;
                 includeItemTypes.Add(item.GetBaseItemKind());
             }
diff --git a/Jellyfin.Api/Controllers/VideoHlsController.cs b/Jellyfin.Api/Controllers/VideoHlsController.cs
index ef25db8c93..bdd2612d1e 100644
--- a/Jellyfin.Api/Controllers/VideoHlsController.cs
+++ b/Jellyfin.Api/Controllers/VideoHlsController.cs
@@ -365,8 +365,9 @@ namespace Jellyfin.Api.Controllers
             }
             else if (string.Equals(segmentFormat, "mp4", StringComparison.OrdinalIgnoreCase))
             {
-                var outputFmp4HeaderArg = string.Empty;
-                if (OperatingSystem.IsWindows())
+                string outputFmp4HeaderArg;
+                var isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+                if (isWindows)
                 {
                     // on Windows, the path of fmp4 header file needs to be configured
                     outputFmp4HeaderArg = " -hls_fmp4_init_filename \"" + outputPrefix + "-1" + outputExtension + "\"";