Fix LUFS detection deadlock on albums with verbose output

1 files changed, 12 insertions, 3 deletions

diff --git a/Emby.Server.Implementations/ScheduledTasks/Tasks/AudioNormalizationTask.cs b/Emby.Server.Implementations/ScheduledTasks/Tasks/AudioNormalizationTask.cs
index a28f280af..78b8759c5 100644
--- a/Emby.Server.Implementations/ScheduledTasks/Tasks/AudioNormalizationTask.cs
+++ b/Emby.Server.Implementations/ScheduledTasks/Tasks/AudioNormalizationTask.cs
@@ -261,14 +261,23 @@ public partial class AudioNormalizationTask : IScheduledTask
 
             using var reader = process.StandardError;
             float? lufs = null;
+            var foundLufs = false;
             await foreach (var line in reader.ReadAllLinesAsync(cancellationToken).ConfigureAwait(false))
             {
+                if (foundLufs)
+                {
+                    continue;
+                }
+
                 Match match = LUFSRegex().Match(line);
-                if (match.Success)
+                if (!match.Success)
                 {
-                    lufs = float.Parse(match.Groups[1].ValueSpan, CultureInfo.InvariantCulture.NumberFormat);
-                    break;
+                    continue;
                 }
+
+                lufs = float.Parse(match.Groups[1].ValueSpan, CultureInfo.InvariantCulture.NumberFormat);
+                foundLufs = true;
+                // Don't break - keep draining stderr to prevent buffer deadlock
             }
 
             if (lufs is null)