diff --git a/FileFlows.Plugin.dll b/FileFlows.Plugin.dll
index 93b9e8e3..5dda64fb 100644
Binary files a/FileFlows.Plugin.dll and b/FileFlows.Plugin.dll differ
diff --git a/FileFlows.Plugin.pdb b/FileFlows.Plugin.pdb
index 91dfda9b..361d0de7 100644
Binary files a/FileFlows.Plugin.pdb and b/FileFlows.Plugin.pdb differ
diff --git a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioNormalization.cs b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioNormalization.cs
index d9cf8bc8..327f39d9 100644
--- a/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioNormalization.cs
+++ b/VideoNodes/FfmpegBuilderNodes/Audio/FfmpegBuilderAudioNormalization.cs
@@ -1,27 +1,46 @@
-using FileFlows.VideoNodes.FfmpegBuilderNodes.Models;
-using System.Diagnostics.CodeAnalysis;
-using System.Text.Json;
+using System.Text.Json;
 
 namespace FileFlows.VideoNodes.FfmpegBuilderNodes;
 
+/// <summary>
+/// Flow element that normalizes the audio
+/// </summary>
 public class FfmpegBuilderAudioNormalization : FfmpegBuilderNode
 {
+    /// <inheritdoc />
     public override string HelpUrl => "https://fileflows.com/docs/plugins/video-nodes/ffmpeg-builder/audio-normalization";
+    /// <inheritdoc />
     public override string Icon => "fas fa-volume-up";
+    /// <inheritdoc />
     public override int Outputs => 2;
-
+    
+    /// <summary>
+    /// Gets or sets if all audio should be normalised
+    /// </summary>
     [Boolean(1)]
     public bool AllAudio { get; set; }
 
+    /// <summary>
+    /// Gets or sets if the audio should be normalised using two passes or if false, a single pass
+    /// </summary>
     [Boolean(2)]
     public bool TwoPass { get; set; }
 
+    /// <summary>
+    /// Gets or sets the pattern to match against the audio file
+    /// </summary>
     [TextVariable(3)]
     public string Pattern { get; set; }
 
+    /// <summary>
+    /// Gets or sets if the match should be inversed
+    /// </summary>
     [Boolean(4)]
     public bool NotMatching { get; set; }
 
+    /// <summary>
+    /// The loud norm target
+    /// </summary>
     internal const string LOUDNORM_TARGET = "I=-24:LRA=7:TP=-2.0";
 
     /// <inheritdoc />
@@ -87,45 +106,47 @@ public class FfmpegBuilderAudioNormalization : FfmpegBuilderNode
         return normalizing ? 1 : 2;
     }
     
+    /// <summary>
+    /// Do a two pass normalization against a file
+    /// </summary>
+    /// <param name="node">the encoding node</param>
+    /// <param name="args">the node parameters</param>
+    /// <param name="ffmpegExe">the FFmpeg executable</param>
+    /// <param name="audioIndex">the audio index in the file</param>
+    /// <param name="localFile">the local filename of the file</param>
+    /// <returns>the result of the normalization</returns>
     public static Result<string> DoTwoPass(EncodingNode node, NodeParameters args, string ffmpegExe, int audioIndex, string localFile)
     {
         //-af loudnorm=I=-24:LRA=7:TP=-2.0"
-        string output;
-        var result = node.Encode(args, ffmpegExe, new List<string>
-        {
+        var result = node.Encode(args, ffmpegExe, [
             "-hide_banner",
             "-i", localFile,
-            "-strict", "-2",  // allow experimental stuff
+            "-strict", "-2", // allow experimental stuff
             "-map", "0:a:" + audioIndex,
             "-af", "loudnorm=" + LOUDNORM_TARGET + ":print_format=json",
             "-f", "null",
             "-"
-        }, out output, updateWorkingFile: false, dontAddInputFile: true);
+        ], out var output, updateWorkingFile: false, dontAddInputFile: true);
 
         if (result == false)
             return Result<string>.Fail("Failed to process audio track");
 
-        int index = output.LastIndexOf("{", StringComparison.Ordinal);
-        if (index == -1)
+        var loudNorm = ExtractParsedLoudnormJson(args.Logger, output);
+
+        if (loudNorm.Count == 0)
+        {
+            args.Logger?.WLog("No LoudNormStats found in:\n" + output);
             return Result<string>.Fail("Failed to detected json in output");
-
-        string json = output[index..];
-        json = json.Substring(0, json.IndexOf("}", StringComparison.Ordinal) + 1);
-        if (string.IsNullOrEmpty(json))
-            return Result<string>.Fail("Failed to parse TwoPass json");
-        LoudNormStats? stats;
-        try
-        {
-            stats = JsonSerializer.Deserialize<LoudNormStats>(json);
-        }
-        catch (Exception ex)
-        {
-            args.Logger.ELog("Failed to parse JSON: " +ex.Message);
-            args.Logger.ELog("JSON:" +  json);
-            return Result<string>.Fail("Failed to parse JSON output from FFmpeg");
         }
 
-        if (stats.input_i == "-inf" || stats.input_lra == "-inf" || stats.input_tp == "-inf" || stats.input_thresh == "-inf" || stats.target_offset == "-inf")
+        LoudNormStats? stats = loudNorm.FirstOrDefault(x =>
+        {
+            if (x.input_i == "-inf" || x.input_lra == "-inf" || x.input_tp == "-inf" || x.input_thresh == "-inf" ||
+                x.target_offset == "-inf")
+                return false;
+            return true;
+        });
+        if (stats == null)
         {
             args.Logger?.WLog("-inf detected in loud norm two pass, falling back to single pass loud norm");
             return $"loudnorm={LOUDNORM_TARGET}";
@@ -135,6 +156,41 @@ public class FfmpegBuilderAudioNormalization : FfmpegBuilderNode
         return ar;
     }
 
+    /// <summary>
+    /// Extracts Loud Norm Ststs object following the [Parsed_loudnorm log entries from the provided log data.
+    /// </summary>
+    /// <param name="logger">The logger to use</param>
+    /// <param name="log">The log as a string.</param>
+    /// <returns>A list of Loud Norm Stats objects.</returns>
+    static List<LoudNormStats> ExtractParsedLoudnormJson(ILogger logger, string log)
+    {
+        List<LoudNormStats> results = new ();
+        Regex regex = new Regex(@"\[Parsed_loudnorm.*?\]\s*{(.*?)}", RegexOptions.Singleline);
+        MatchCollection matches = regex.Matches(log);
+
+        foreach (Match match in matches)
+        {
+            string json = "{" + match.Groups[1].Value + "}";
+            try
+            {
+                var ln = JsonSerializer.Deserialize<LoudNormStats>(json);
+                if (ln != null)
+                    results.Add(ln);
+            }
+            catch (Exception ex)
+            {
+                // Ignored
+                logger?.ELog("Failed to parse JSON: " + ex.Message);
+                logger?.ELog("JSON:" + json);
+            }
+        }
+
+        return results;
+    }
+    
+    /// <summary>
+    /// Represents the loudness normalization statistics.
+    /// </summary>
     private class LoudNormStats
     {
         /* 
@@ -151,11 +207,31 @@ public class FfmpegBuilderAudioNormalization : FfmpegBuilderNode
 	"target_offset" : "0.25"
 }
        */
-        public string input_i { get; set; }
-        public string input_tp { get; set; }
-        public string input_lra { get; set; }
-        public string input_thresh { get; set; }
-        public string target_offset { get; set; }
+        
+        /// <summary>
+        /// Integrated loudness of the input in LUFS.
+        /// </summary>
+        public string input_i { get; init; }
+
+        /// <summary>
+        /// True peak of the input in dBTP.
+        /// </summary>
+        public string input_tp { get; init; }
+
+        /// <summary>
+        /// Loudness range of the input in LU.
+        /// </summary>
+        public string input_lra { get; init; }
+
+        /// <summary>
+        /// Threshold of the input in LUFS.
+        /// </summary>
+        public string input_thresh { get; init; }
+
+        /// <summary>
+        /// Target offset for normalization in LU.
+        /// </summary>
+        public string target_offset { get; init; }
     }
 
 }
diff --git a/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs b/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
index b5e2d2aa..07d72e91 100644
--- a/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
+++ b/VideoNodes/Tests/FfmpegBuilderTests/FfmpegBuilder_BasicTests.cs
@@ -261,14 +261,12 @@ public class FfmpegBuilder_BasicTests : TestBase
     [TestMethod]
     public void FfmpegBuilder_AddAc3Aac_Normalize()
     {
-        const string file = @"D:\videos\unprocessed\dummy.mkv";
-        var logger = new TestLogger();
-        const string ffmpeg = @"C:\utils\ffmpeg\ffmpeg.exe";
-        var vi = new VideoInfoHelper(ffmpeg, logger);
+        const string file = @"/home/john/src/ff-files/test-files/videos/basic {tvdb-71470}.mkv";
+        var vi = new VideoInfoHelper(FfmpegPath, Logger);
         var vii = vi.Read(file);
-        var args = new NodeParameters(file, logger, false, string.Empty, null);
-        args.GetToolPathActual = (string tool) => ffmpeg;
-        args.TempPath = @"D:\videos\temp";
+        var args = new NodeParameters(file, Logger, false, string.Empty, new LocalFileService());
+        args.GetToolPathActual = (string tool) => FfmpegPath;
+        args.TempPath = @"/home/john/src/ff-files/temp";
         args.Parameters.Add("VideoInfo", vii);
 
 
@@ -299,7 +297,7 @@ public class FfmpegBuilder_BasicTests : TestBase
         ffAddAudio2.Execute(args);
 
         FfmpegBuilderAudioNormalization ffAudioNormalize = new();
-        ffAudioNormalize.TwoPass = false;
+        ffAudioNormalize.TwoPass = true;
         ffAudioNormalize.AllAudio = true;
         ffAudioNormalize.PreExecute(args);
         ffAudioNormalize.Execute(args);
@@ -308,7 +306,6 @@ public class FfmpegBuilder_BasicTests : TestBase
         ffExecutor.PreExecute(args);
         int result = ffExecutor.Execute(args);
 
-        string log = logger.ToString();
         Assert.AreEqual(1, result);
     }
 
diff --git a/VideoNodes/Tests/_LocalFileService.cs b/VideoNodes/Tests/_LocalFileService.cs
index a0488592..cc33cc82 100644
--- a/VideoNodes/Tests/_LocalFileService.cs
+++ b/VideoNodes/Tests/_LocalFileService.cs
@@ -377,7 +377,27 @@ public class LocalFileService : IFileService
 
     public Result<long> DirectorySize(string path)
     {
-        throw new NotImplementedException();
+        if (string.IsNullOrWhiteSpace(path))
+            return 0;
+        
+        if (File.Exists(path))
+            path = new FileInfo(path).Directory?.FullName ?? string.Empty;
+        
+        if (string.IsNullOrWhiteSpace(path))
+            return 0;
+        
+        if (Directory.Exists(path) == false)
+            return 0;
+        
+        try
+        {
+            DirectoryInfo dir = new DirectoryInfo(path);
+            return dir.EnumerateFiles("*.*", SearchOption.AllDirectories).Sum(x => x.Length);
+        }
+        catch (Exception)
+        {
+            return 0;
+        }
     }
 
     public Result<bool> SetCreationTimeUtc(string path, DateTime date)