fix: suppress repeated PriorityClass warning in MediaEncoder

When Jellyfin runs without permission to set process priority (e.g.
Docker), StartProcess() logged a warning for every file probed during
a library scan. Add a _canSetProcessPriority flag: warn once on first
failure, skip all subsequent attempts.

Fixes #15287

1 files changed, 12 insertions, 6 deletions

diff --git a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
index f34e911a05..66bf6ebd24 100644
--- a/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
+++ b/MediaBrowser.MediaEncoding/Encoder/MediaEncoder.cs
@@ -85,6 +85,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
         private bool _isVaapiDeviceSupportVulkanDrmModifier = false;
         private bool _isVaapiDeviceSupportVulkanDrmInterop = false;
 
+        private bool _canSetProcessPriority = true;
+
         private bool _isVideoToolboxAv1DecodeAvailable = false;
 
         private static string[] _vulkanImageDrmFmtModifierExts =
@@ -1123,13 +1125,17 @@ namespace MediaBrowser.MediaEncoding.Encoder
         {
             process.Process.Start();
 
-            try
-            {
-                process.Process.PriorityClass = ProcessPriorityClass.BelowNormal;
-            }
-            catch (Exception ex)
+            if (_canSetProcessPriority)
             {
-                _logger.LogWarning(ex, "Unable to set process priority to BelowNormal for {ProcessFileName}", process.Process.StartInfo.FileName);
+                try
+                {
+                    process.Process.PriorityClass = ProcessPriorityClass.BelowNormal;
+                }
+                catch (Exception ex)
+                {
+                    _canSetProcessPriority = false;
+                    _logger.LogWarning(ex, "Unable to set process priority to BelowNormal for {ProcessFileName}. Further attempts will be skipped.", process.Process.StartInfo.FileName);
+                }
             }
 
             lock (_runningProcessesLock)