Merge pull request #305 from Mbucari/master

Fix some bugs with user settings.

Source/AaxDecrypter/AaxcDownloadConvertBase.cs

@@ -34,27 +34,12 @@ namespace AaxDecrypter
 
 			//Finishing configuring lame encoder.
 			if (DownloadOptions.OutputFormat == OutputFormat.Mp3)
-			{
+				MpegUtil.ConfigureLameOptions(
-				double bitrateMultiple = 1;
+					AaxFile,
+					DownloadOptions.LameConfig,
+					DownloadOptions.Downsample,
+					DownloadOptions.MatchSourceBitrate);
 
-				if (AaxFile.AudioChannels == 2)
-				{
-					if (DownloadOptions.Downsample)
-						bitrateMultiple = 0.5;
-					else
-						DownloadOptions.LameConfig.Mode = NAudio.Lame.MPEGMode.Stereo;
-				}
-
-				if (DownloadOptions.MatchSourceBitrate)
-				{
-					int kbps = (int)(AaxFile.AverageBitrate * bitrateMultiple / 1024);
-
-					if (DownloadOptions.LameConfig.VBR is null)
-						DownloadOptions.LameConfig.BitRate = kbps;
-					else if (DownloadOptions.LameConfig.VBR == NAudio.Lame.VBRMode.ABR)
-						DownloadOptions.LameConfig.ABRRateKbps = kbps;
-				}
-			}
 
 			OnRetrievedTitle(AaxFile.AppleTags.TitleSansUnabridged);
 			OnRetrievedAuthors(AaxFile.AppleTags.FirstAuthor ?? "[unknown]");

Source/AaxDecrypter/AaxcDownloadSingleConverter.cs

@@ -78,13 +78,10 @@ namespace AaxDecrypter
 			OnFileCreated(OutputFileName);
 
 			AaxFile.ConversionProgressUpdate += AaxFile_ConversionProgressUpdate;
-			var decryptionResult
-				= DownloadOptions.OutputFormat == OutputFormat.M4b
-				? await AaxFile.ConvertToMp4aAsync(outputFile, DownloadOptions.ChapterInfo, DownloadOptions.TrimOutputToChapterLength)
-				: await AaxFile.ConvertToMp3Async(outputFile, DownloadOptions.LameConfig, DownloadOptions.ChapterInfo, DownloadOptions.TrimOutputToChapterLength);
-			AaxFile.ConversionProgressUpdate -= AaxFile_ConversionProgressUpdate;
 
-			DownloadOptions.ChapterInfo = AaxFile.Chapters;
+			ConversionResult decryptionResult = await decryptAsync(outputFile);
+
+			AaxFile.ConversionProgressUpdate -= AaxFile_ConversionProgressUpdate;
 
 			Step_DownloadAudiobook_End(zeroProgress);
 
@@ -94,5 +91,23 @@ namespace AaxDecrypter
 
 			return success;
 		}
+
+		private Task<ConversionResult> decryptAsync(Stream outputFile)
+			=> DownloadOptions.OutputFormat == OutputFormat.Mp3 ? 
+			AaxFile.ConvertToMp3Async
+			(
+				outputFile,
+				DownloadOptions.LameConfig,
+				DownloadOptions.ChapterInfo,
+				DownloadOptions.TrimOutputToChapterLength
+			)
+			: DownloadOptions.FixupFile ?
+				AaxFile.ConvertToMp4aAsync
+				(
+					outputFile,
+					DownloadOptions.ChapterInfo,
+					DownloadOptions.TrimOutputToChapterLength
+				)
+				: AaxFile.ConvertToMp4aAsync(outputFile);
 	}
 }

Source/AaxDecrypter/IDownloadOptions.cs

@@ -14,10 +14,11 @@ namespace AaxDecrypter
         bool RetainEncryptedFile { get; }
         bool StripUnabridged { get; }
         bool CreateCueSheet { get; }
-        ChapterInfo ChapterInfo { get; set; }
+        ChapterInfo ChapterInfo { get; }
-        NAudio.Lame.LameConfig LameConfig { get; set; }
+        bool FixupFile { get; }
-        bool Downsample { get; set; }
+        NAudio.Lame.LameConfig LameConfig { get; }
-        bool MatchSourceBitrate { get; set; }
+        bool Downsample { get; }
+        bool MatchSourceBitrate { get; }
         string GetMultipartFileName(MultiConvertFileProperties props);
         string GetMultipartTitleName(MultiConvertFileProperties props);
     }    

Source/AaxDecrypter/MpegUtil.cs

@@ -0,0 +1,33 @@
+using AAXClean;
+using NAudio.Lame;
+using System;
+using System.Linq;
+
+namespace AaxDecrypter
+{
+	public static class MpegUtil
+	{
+		public static void ConfigureLameOptions(Mp4File mp4File, LameConfig lameConfig, bool downsample, bool matchSourceBitrate)
+		{
+			double bitrateMultiple = 1;
+
+			if (mp4File.AudioChannels == 2)
+			{
+				if (downsample)
+					bitrateMultiple = 0.5;
+				else
+					lameConfig.Mode = MPEGMode.Stereo;
+			}
+
+			if (matchSourceBitrate)
+			{
+				int kbps = (int)(mp4File.AverageBitrate * bitrateMultiple / 1024);
+
+				if (lameConfig.VBR is null)
+					lameConfig.BitRate = kbps;
+				else if (lameConfig.VBR == VBRMode.ABR)
+					lameConfig.ABRRateKbps = kbps;
+			}
+		}
+	}
+}

Source/AppScaffolding/AppScaffolding.csproj

@@ -2,7 +2,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net6.0-windows</TargetFramework>
-    <Version>8.1.5.1</Version>
+    <Version>8.1.5.23</Version>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Octokit" Version="0.51.0" />
@@ -18,6 +18,6 @@
     <DebugType>embedded</DebugType>
   </PropertyGroup>
   <Target Name="PreBuild" BeforeTargets="PreBuildEvent">
-    <Exec Command="if $(Configuration) == Debug (&#xD;&#xA;dotnet bump-version revision AppScaffolding.csproj&#xD;&#xA;)" />
+    <Exec Command="if $(Configuration) == Debug (&#xD;&#xA;dotnet tool restore&#xD;&#xA;dotnet bump-version revision AppScaffolding.csproj&#xD;&#xA;)" />
   </Target>
 </Project>

Source/FileLiberator/ConvertToMp3.cs

@@ -53,8 +53,17 @@ namespace FileLiberator
 					OnNarratorsDiscovered(m4bBook.AppleTags.Narrator);
 					OnCoverImageDiscovered(m4bBook.AppleTags.Cover);
 
+					var config = Configuration.Instance;
+					var lameConfig = GetLameOptions(config);
+
+					//Finishing configuring lame encoder.
+					AaxDecrypter.MpegUtil.ConfigureLameOptions(
+						m4bBook,
+						lameConfig,
+						config.LameDownsampleMono,
+						config.LameMatchSourceBR);
+
 					using var mp3File = File.OpenWrite(Path.GetTempFileName());
-					var lameConfig = GetLameOptions(Configuration.Instance);
 					var result = await m4bBook.ConvertToMp3Async(mp3File, lameConfig);
 					m4bBook.InputStream.Close();
 					mp3File.Close();

Source/FileLiberator/DownloadDecryptBook.cs

@@ -146,6 +146,9 @@ namespace FileLiberator
 			var outputFormat = !encrypted || (config.AllowLibationFixup && config.DecryptToLossy) ?
 					 OutputFormat.Mp3 : OutputFormat.M4b;
 
+			long chapterStartMs = config.StripAudibleBrandAudio ?
+				contentLic.ContentMetadata.ChapterInfo.BrandIntroDurationMs : 0;
+
 			var dlOptions = new DownloadOptions
 				 (
 					libraryBook,
@@ -162,7 +165,9 @@ namespace FileLiberator
 				Downsample = config.AllowLibationFixup && config.LameDownsampleMono,
 				MatchSourceBitrate = config.AllowLibationFixup && config.LameMatchSourceBR && config.LameTargetBitrate,
 				CreateCueSheet = config.CreateCueSheet,
-					LameConfig = GetLameOptions(config)
+				LameConfig = GetLameOptions(config),
+				ChapterInfo = new AAXClean.ChapterInfo(TimeSpan.FromMilliseconds(chapterStartMs)),
+				FixupFile = config.AllowLibationFixup
 			};
 
 			var chapters = flattenChapters(contentLic.ContentMetadata.ChapterInfo.Chapters).OrderBy(c => c.StartOffsetMs).ToList();
@@ -170,31 +175,98 @@ namespace FileLiberator
 			if (config.MergeOpeningAndEndCredits)
 				combineCredits(chapters);
 
-			if (config.AllowLibationFixup || outputFormat == OutputFormat.Mp3)
-			{
-				long startMs = dlOptions.TrimOutputToChapterLength ?
-					contentLic.ContentMetadata.ChapterInfo.BrandIntroDurationMs : 0;
-
-				dlOptions.ChapterInfo = new AAXClean.ChapterInfo(TimeSpan.FromMilliseconds(startMs));
-
 			for (int i = 0; i < chapters.Count; i++)
 			{
 				var chapter = chapters[i];
 				long chapLenMs = chapter.LengthMs;
 
 				if (i == 0)
-						chapLenMs -= startMs;
+					chapLenMs -= chapterStartMs;
 
 				if (config.StripAudibleBrandAudio && i == chapters.Count - 1)
 					chapLenMs -= contentLic.ContentMetadata.ChapterInfo.BrandOutroDurationMs;
 
 				dlOptions.ChapterInfo.AddChapter(chapter.Title, TimeSpan.FromMilliseconds(chapLenMs));
 			}
-			}
 
 			return dlOptions;
 		}
 
+		/*
+
+		Flatten Audible's new hierarchical chapters, combining children into parents.
+
+		Audible may deliver chapters like this:
+
+		00:00 - 00:10	Opening Credits
+		00:10 - 00:12	Book 1
+		00:12 - 00:14	|	Part 1
+		00:14 - 01:40	|	|	Chapter 1
+		01:40 - 03:20	|	|	Chapter 2
+		03:20 - 03:22	|	Part 2
+		03:22 - 05:00	|	|	Chapter 3
+		05:00 - 06:40	|	|	Chapter 4
+		06:40 - 06:42	Book 2
+		06:42 - 06:44	|	Part 3
+		06:44 - 08:20	|	|	Chapter 5
+		08:20 - 10:00	|	|	Chapter 6
+		10:00 - 10:02	|	Part 4
+		10:02 - 11:40	|	|	Chapter 7
+		11:40 - 13:20	|	|	Chapter 8
+		13:20 - 13:30	End Credits
+
+		And flattenChapters will combine them into this:
+
+		00:00 - 00:10	Opening Credits
+		00:10 - 01:40	Book 1: Part 1: Chapter 1
+		01:40 - 03:20	Book 1: Part 1: Chapter 2
+		03:20 - 05:00	Book 1: Part 2: Chapter 3
+		05:00 - 06:40	Book 1: Part 2: Chapter 4
+		06:40 - 08:20	Book 2: Part 3: Chapter 5
+		08:20 - 10:00	Book 2: Part 3: Chapter 6
+		10:00 - 11:40	Book 2: Part 4: Chapter 7
+		11:40 - 13:20	Book 2: Part 4: Chapter 8
+		13:20 - 13:40	End Credits
+
+		However, if one of the parent chapters is longer than 10000 milliseconds, it's kept as its own
+		chapter. A duration longer than a few seconds implies that the chapter contains more than just
+		the narrator saying the chapter title, so it should probably be preserved as a separate chapter.
+		Using the example above, if "Book 1" was 15 seconds long and "Part 3" was 20 seconds long:
+
+		00:00 - 00:10	Opening Credits
+		00:10 - 00:25	Book 1
+		00:25 - 00:27	|	Part 1
+		00:27 - 01:40	|	|	Chapter 1
+		01:40 - 03:20	|	|	Chapter 2
+		03:20 - 03:22	|	Part 2
+		03:22 - 05:00	|	|	Chapter 3
+		05:00 - 06:40	|	|	Chapter 4
+		06:40 - 06:42	Book 2
+		06:42 - 07:02	|	Part 3
+		07:02 - 08:20	|	|	Chapter 5
+		08:20 - 10:00	|	|	Chapter 6
+		10:00 - 10:02	|	Part 4
+		10:02 - 11:40	|	|	Chapter 7
+		11:40 - 13:20	|	|	Chapter 8
+		13:20 - 13:30	End Credits
+
+		then flattenChapters will combine them into this:
+
+		00:00 - 00:10	Opening Credits
+		00:10 - 00:25	Book 1
+		00:25 - 01:40	Book 1: Part 1: Chapter 1
+		01:40 - 03:20	Book 1: Part 1: Chapter 2
+		03:20 - 05:00	Book 1: Part 2: Chapter 3
+		05:00 - 06:40	Book 1: Part 2: Chapter 4
+		06:40 - 07:02	Book 2: Part 3
+		07:02 - 08:20	Book 2: Part 3: Chapter 5
+		08:20 - 10:00	Book 2: Part 3: Chapter 6
+		10:00 - 11:40	Book 2: Part 4: Chapter 7
+		11:40 - 13:20	Book 2: Part 4: Chapter 8
+		13:20 - 13:40	End Credits
+
+		*/
+
 		public static List<AudibleApi.Common.Chapter> flattenChapters(IList<AudibleApi.Common.Chapter> chapters, string titleConcat = ": ")
 		{
 			List<AudibleApi.Common.Chapter> chaps = new();
@@ -202,10 +274,15 @@ namespace FileLiberator
 			foreach (var c in chapters)
 			{
 				if (c.Chapters is not null)
+				{
+					if (c.LengthMs < 10000)
 					{
 						c.Chapters[0].StartOffsetMs = c.StartOffsetMs;
 						c.Chapters[0].StartOffsetSec = c.StartOffsetSec;
 						c.Chapters[0].LengthMs += c.LengthMs;
+					}
+					else
+						chaps.Add(c);
 
 					var children = flattenChapters(c.Chapters);
 
@@ -213,6 +290,7 @@ namespace FileLiberator
 						child.Title = $"{c.Title}{titleConcat}{child.Title}";
 
 					chaps.AddRange(children);
+					c.Chapters = null;
 				}
 				else
 					chaps.Add(c);

Source/FileLiberator/DownloadOptions.cs

@@ -20,10 +20,11 @@ namespace FileLiberator
         public bool RetainEncryptedFile { get; init; }
         public bool StripUnabridged { get; init; }
         public bool CreateCueSheet { get; init; }
-        public ChapterInfo ChapterInfo { get; set; }
+        public ChapterInfo ChapterInfo { get; init; }
-        public NAudio.Lame.LameConfig LameConfig { get; set; }
+        public bool FixupFile { get; init; }
-        public bool Downsample { get; set; }
+        public NAudio.Lame.LameConfig LameConfig { get; init; }
-        public bool MatchSourceBitrate { get; set; }
+        public bool Downsample { get; init; }
+        public bool MatchSourceBitrate { get; init; }
         public ReplacementCharacters ReplacementCharacters => Configuration.Instance.ReplacementCharacters;
 
         public string GetMultipartFileName(MultiConvertFileProperties props)

Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs

@@ -43,6 +43,7 @@ namespace LibationWinForms.Dialogs
 			LameMatchSourceBRCbox_CheckedChanged(this, EventArgs.Empty);
 			convertFormatRb_CheckedChanged(this, EventArgs.Empty);
 			allowLibationFixupCbox_CheckedChanged(this, EventArgs.Empty);
+			splitFilesByChapterCbox_CheckedChanged(this, EventArgs.Empty);
 		}
 
 		private void Save_AudioSettings(Configuration config)
@@ -92,6 +93,7 @@ namespace LibationWinForms.Dialogs
 		}
 		private void allowLibationFixupCbox_CheckedChanged(object sender, EventArgs e)
 		{
+			audiobookFixupsGb.Enabled = allowLibationFixupCbox.Checked;
 			convertLosslessRb.Enabled = allowLibationFixupCbox.Checked;
 			convertLossyRb.Enabled = allowLibationFixupCbox.Checked;
 			splitFilesByChapterCbox.Enabled = allowLibationFixupCbox.Checked;

Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs

@@ -105,10 +105,11 @@
 			this.lameTargetQualityRb = new System.Windows.Forms.RadioButton();
 			this.lameTargetBitrateRb = new System.Windows.Forms.RadioButton();
 			this.stripUnabridgedCbox = new System.Windows.Forms.CheckBox();
+			this.mergeOpeningEndCreditsCbox = new System.Windows.Forms.CheckBox();
 			this.retainAaxFileCbox = new System.Windows.Forms.CheckBox();
 			this.downloadCoverArtCbox = new System.Windows.Forms.CheckBox();
 			this.createCueSheetCbox = new System.Windows.Forms.CheckBox();
-			this.mergeOpeningEndCreditsCbox = new System.Windows.Forms.CheckBox();
+			this.audiobookFixupsGb = new System.Windows.Forms.GroupBox();
 			this.badBookGb.SuspendLayout();
 			this.tabControl.SuspendLayout();
 			this.tab1ImportantSettings.SuspendLayout();
@@ -125,6 +126,7 @@
 			this.lameQualityGb.SuspendLayout();
 			((System.ComponentModel.ISupportInitialize)(this.lameVBRQualityTb)).BeginInit();
 			this.groupBox2.SuspendLayout();
+			this.audiobookFixupsGb.SuspendLayout();
 			this.SuspendLayout();
 			// 
 			// booksLocationDescLbl
@@ -252,7 +254,7 @@
 			// stripAudibleBrandingCbox
 			// 
 			this.stripAudibleBrandingCbox.AutoSize = true;
-			this.stripAudibleBrandingCbox.Location = new System.Drawing.Point(19, 193);
+			this.stripAudibleBrandingCbox.Location = new System.Drawing.Point(13, 72);
 			this.stripAudibleBrandingCbox.Name = "stripAudibleBrandingCbox";
 			this.stripAudibleBrandingCbox.Size = new System.Drawing.Size(143, 34);
 			this.stripAudibleBrandingCbox.TabIndex = 13;
@@ -262,7 +264,7 @@
 			// splitFilesByChapterCbox
 			// 
 			this.splitFilesByChapterCbox.AutoSize = true;
-			this.splitFilesByChapterCbox.Location = new System.Drawing.Point(19, 118);
+			this.splitFilesByChapterCbox.Location = new System.Drawing.Point(13, 22);
 			this.splitFilesByChapterCbox.Name = "splitFilesByChapterCbox";
 			this.splitFilesByChapterCbox.Size = new System.Drawing.Size(162, 19);
 			this.splitFilesByChapterCbox.TabIndex = 13;
@@ -275,7 +277,7 @@
 			this.allowLibationFixupCbox.AutoSize = true;
 			this.allowLibationFixupCbox.Checked = true;
 			this.allowLibationFixupCbox.CheckState = System.Windows.Forms.CheckState.Checked;
-			this.allowLibationFixupCbox.Location = new System.Drawing.Point(19, 18);
+			this.allowLibationFixupCbox.Location = new System.Drawing.Point(19, 118);
 			this.allowLibationFixupCbox.Name = "allowLibationFixupCbox";
 			this.allowLibationFixupCbox.Size = new System.Drawing.Size(163, 19);
 			this.allowLibationFixupCbox.TabIndex = 10;
@@ -286,7 +288,7 @@
 			// convertLossyRb
 			// 
 			this.convertLossyRb.AutoSize = true;
-			this.convertLossyRb.Location = new System.Drawing.Point(19, 257);
+			this.convertLossyRb.Location = new System.Drawing.Point(13, 136);
 			this.convertLossyRb.Name = "convertLossyRb";
 			this.convertLossyRb.Size = new System.Drawing.Size(329, 19);
 			this.convertLossyRb.TabIndex = 12;
@@ -298,7 +300,7 @@
 			// 
 			this.convertLosslessRb.AutoSize = true;
 			this.convertLosslessRb.Checked = true;
-			this.convertLosslessRb.Location = new System.Drawing.Point(19, 232);
+			this.convertLosslessRb.Location = new System.Drawing.Point(13, 111);
 			this.convertLosslessRb.Name = "convertLosslessRb";
 			this.convertLosslessRb.Size = new System.Drawing.Size(335, 19);
 			this.convertLosslessRb.TabIndex = 11;
@@ -603,14 +605,10 @@
 			// 
 			// tab4AudioFileOptions
 			// 
+			this.tab4AudioFileOptions.Controls.Add(this.audiobookFixupsGb);
 			this.tab4AudioFileOptions.Controls.Add(this.chapterTitleTemplateGb);
 			this.tab4AudioFileOptions.Controls.Add(this.lameOptionsGb);
-			this.tab4AudioFileOptions.Controls.Add(this.convertLossyRb);
-			this.tab4AudioFileOptions.Controls.Add(this.stripAudibleBrandingCbox);
-			this.tab4AudioFileOptions.Controls.Add(this.convertLosslessRb);
-			this.tab4AudioFileOptions.Controls.Add(this.stripUnabridgedCbox);
 			this.tab4AudioFileOptions.Controls.Add(this.mergeOpeningEndCreditsCbox);
-			this.tab4AudioFileOptions.Controls.Add(this.splitFilesByChapterCbox);
 			this.tab4AudioFileOptions.Controls.Add(this.retainAaxFileCbox);
 			this.tab4AudioFileOptions.Controls.Add(this.downloadCoverArtCbox);
 			this.tab4AudioFileOptions.Controls.Add(this.createCueSheetCbox);
@@ -982,17 +980,27 @@
 			// stripUnabridgedCbox
 			// 
 			this.stripUnabridgedCbox.AutoSize = true;
-			this.stripUnabridgedCbox.Location = new System.Drawing.Point(19, 168);
+			this.stripUnabridgedCbox.Location = new System.Drawing.Point(13, 47);
 			this.stripUnabridgedCbox.Name = "stripUnabridgedCbox";
 			this.stripUnabridgedCbox.Size = new System.Drawing.Size(147, 19);
 			this.stripUnabridgedCbox.TabIndex = 13;
 			this.stripUnabridgedCbox.Text = "[StripUnabridged desc]";
 			this.stripUnabridgedCbox.UseVisualStyleBackColor = true;
 			// 
+			// mergeOpeningEndCreditsCbox
+			// 
+			this.mergeOpeningEndCreditsCbox.AutoSize = true;
+			this.mergeOpeningEndCreditsCbox.Location = new System.Drawing.Point(19, 93);
+			this.mergeOpeningEndCreditsCbox.Name = "mergeOpeningEndCreditsCbox";
+			this.mergeOpeningEndCreditsCbox.Size = new System.Drawing.Size(198, 19);
+			this.mergeOpeningEndCreditsCbox.TabIndex = 13;
+			this.mergeOpeningEndCreditsCbox.Text = "[MergeOpeningEndCredits desc]";
+			this.mergeOpeningEndCreditsCbox.UseVisualStyleBackColor = true;
+			// 
 			// retainAaxFileCbox
 			// 
 			this.retainAaxFileCbox.AutoSize = true;
-			this.retainAaxFileCbox.Location = new System.Drawing.Point(19, 93);
+			this.retainAaxFileCbox.Location = new System.Drawing.Point(19, 68);
 			this.retainAaxFileCbox.Name = "retainAaxFileCbox";
 			this.retainAaxFileCbox.Size = new System.Drawing.Size(132, 19);
 			this.retainAaxFileCbox.TabIndex = 10;
@@ -1005,7 +1013,7 @@
 			this.downloadCoverArtCbox.AutoSize = true;
 			this.downloadCoverArtCbox.Checked = true;
 			this.downloadCoverArtCbox.CheckState = System.Windows.Forms.CheckState.Checked;
-			this.downloadCoverArtCbox.Location = new System.Drawing.Point(19, 68);
+			this.downloadCoverArtCbox.Location = new System.Drawing.Point(19, 43);
 			this.downloadCoverArtCbox.Name = "downloadCoverArtCbox";
 			this.downloadCoverArtCbox.Size = new System.Drawing.Size(162, 19);
 			this.downloadCoverArtCbox.TabIndex = 10;
@@ -1018,7 +1026,7 @@
 			this.createCueSheetCbox.AutoSize = true;
 			this.createCueSheetCbox.Checked = true;
 			this.createCueSheetCbox.CheckState = System.Windows.Forms.CheckState.Checked;
-			this.createCueSheetCbox.Location = new System.Drawing.Point(19, 43);
+			this.createCueSheetCbox.Location = new System.Drawing.Point(19, 18);
 			this.createCueSheetCbox.Name = "createCueSheetCbox";
 			this.createCueSheetCbox.Size = new System.Drawing.Size(145, 19);
 			this.createCueSheetCbox.TabIndex = 10;
@@ -1026,16 +1034,19 @@
 			this.createCueSheetCbox.UseVisualStyleBackColor = true;
 			this.createCueSheetCbox.CheckedChanged += new System.EventHandler(this.allowLibationFixupCbox_CheckedChanged);
 			// 
-			// mergeBeginningEndCreditsCbox
+			// audiobookFixupsGb
 			// 
-			this.mergeOpeningEndCreditsCbox.AutoSize = true;
+			this.audiobookFixupsGb.Controls.Add(this.splitFilesByChapterCbox);
-			this.mergeOpeningEndCreditsCbox.Location = new System.Drawing.Point(19, 143);
+			this.audiobookFixupsGb.Controls.Add(this.stripUnabridgedCbox);
-			this.mergeOpeningEndCreditsCbox.Name = "mergeOpeningEndCreditsCbox";
+			this.audiobookFixupsGb.Controls.Add(this.convertLosslessRb);
-			this.mergeOpeningEndCreditsCbox.Size = new System.Drawing.Size(206, 19);
+			this.audiobookFixupsGb.Controls.Add(this.convertLossyRb);
-			this.mergeOpeningEndCreditsCbox.TabIndex = 13;
+			this.audiobookFixupsGb.Controls.Add(this.stripAudibleBrandingCbox);
-			this.mergeOpeningEndCreditsCbox.Text = "[MergeOpeningEndCredits desc]";
+			this.audiobookFixupsGb.Location = new System.Drawing.Point(6, 143);
-			this.mergeOpeningEndCreditsCbox.UseVisualStyleBackColor = true;
+			this.audiobookFixupsGb.Name = "audiobookFixupsGb";
-			this.mergeOpeningEndCreditsCbox.CheckedChanged += new System.EventHandler(this.splitFilesByChapterCbox_CheckedChanged);
+			this.audiobookFixupsGb.Size = new System.Drawing.Size(403, 160);
+			this.audiobookFixupsGb.TabIndex = 19;
+			this.audiobookFixupsGb.TabStop = false;
+			this.audiobookFixupsGb.Text = "Audiobook Fix-ups";
 			// 
 			// SettingsDialog
 			// 
@@ -1083,6 +1094,8 @@
 			((System.ComponentModel.ISupportInitialize)(this.lameVBRQualityTb)).EndInit();
 			this.groupBox2.ResumeLayout(false);
 			this.groupBox2.PerformLayout();
+			this.audiobookFixupsGb.ResumeLayout(false);
+			this.audiobookFixupsGb.PerformLayout();
 			this.ResumeLayout(false);
 
 		}
@@ -1169,5 +1182,6 @@
 		private System.Windows.Forms.TextBox chapterTitleTemplateTb;
 		private System.Windows.Forms.Button editCharreplacementBtn;
 		private System.Windows.Forms.CheckBox mergeOpeningEndCreditsCbox;
+		private System.Windows.Forms.GroupBox audiobookFixupsGb;
 	}
 }

Source/_Tests/FileLiberator.Tests/DownloadDecryptBookTests.cs

@@ -148,6 +148,141 @@ namespace FileLiberator.Tests
 			},
 		};
 
+
+		private static Chapter[] HierarchicalChapters_LongerParents => new Chapter[]
+		{
+			new ()
+			{
+				Title = "Opening Credits",
+				StartOffsetMs = 0,
+				StartOffsetSec = 0,
+				LengthMs = 10000,
+			},
+			new ()
+			{
+				Title = "Book 1",
+				StartOffsetMs = 10000,
+				StartOffsetSec = 10,
+				LengthMs = 15000,
+				Chapters = new Chapter[]
+				{
+					new ()
+					{
+						Title = "Part 1",
+						StartOffsetMs = 25000,
+						StartOffsetSec = 25,
+						LengthMs = 2000,
+						Chapters = new Chapter[]
+						{
+							new ()
+							{
+								Title = "Chapter 1",
+								StartOffsetMs = 27000,
+								StartOffsetSec = 27,
+								LengthMs = 73000,
+							},
+							new()
+							{
+								Title = "Chapter 2",
+								StartOffsetMs = 100000,
+								StartOffsetSec = 100,
+								LengthMs = 100000,
+							},
+						}
+					},
+					new()
+					{
+						Title = "Part 2",
+						StartOffsetMs = 200000,
+						StartOffsetSec = 200,
+						LengthMs = 2000,
+						Chapters = new Chapter[]
+						{
+							new()
+							{
+								Title = "Chapter 3",
+								StartOffsetMs = 202000,
+								StartOffsetSec = 202,
+								LengthMs = 98000,
+							},
+							new()
+							{
+								Title = "Chapter 4",
+								StartOffsetMs = 300000,
+								StartOffsetSec = 300,
+								LengthMs = 100000,
+							},
+						}
+					}
+				}
+			},
+			new()
+			{
+				Title = "Book 2",
+				StartOffsetMs = 400000,
+				StartOffsetSec = 400,
+				LengthMs = 2000,
+				Chapters = new Chapter[]
+				{
+					new()
+					{
+						Title = "Part 3",
+						StartOffsetMs = 402000,
+						StartOffsetSec = 402,
+						LengthMs = 20000,
+						Chapters = new Chapter[]
+						{
+							new()
+							{
+								Title = "Chapter 5",
+								StartOffsetMs = 422000,
+								StartOffsetSec = 422,
+								LengthMs = 78000,
+							},
+							new()
+							{
+								Title = "Chapter 6",
+								StartOffsetMs = 500000,
+								StartOffsetSec = 500,
+								LengthMs = 100000,
+							},
+						}
+					},
+					new()
+					{
+						Title = "Part 4",
+						StartOffsetMs = 600000,
+						StartOffsetSec = 600,
+						LengthMs = 2000,
+						Chapters = new Chapter[]
+						{
+							new()
+							{
+								Title = "Chapter 7",
+								StartOffsetMs = 602000,
+								StartOffsetSec = 602,
+								LengthMs = 98000,
+							},
+							new()
+							{
+								Title = "Chapter 8",
+								StartOffsetMs = 700000,
+								StartOffsetSec = 700,
+								LengthMs = 100000,
+							},
+						}
+					}
+				}
+			},
+			new()
+			{
+				Title = "End Credits",
+				StartOffsetMs = 800000,
+				StartOffsetSec = 800,
+				LengthMs = 10000,
+			},
+		};
+
 		[TestMethod]
 		public void Chapters_CombineCredits()
 		{
@@ -299,6 +434,102 @@ namespace FileLiberator.Tests
 			checkChapters(flatChapters, expected);
 		}
 
+		[TestMethod]
+		public void HierarchicalChapters_LongerParents_Flatten()
+		{
+			var expected = new Chapter[]
+			{
+				new()
+				{
+					Title = "Opening Credits",
+					StartOffsetMs = 0,
+					StartOffsetSec = 0,
+					LengthMs = 10000,
+				},
+				new()
+				{
+					Title = "Book 1",
+					StartOffsetMs = 10000,
+					StartOffsetSec = 10,
+					LengthMs = 15000,
+				},
+				new()
+				{
+					Title = "Book 1: Part 1: Chapter 1",
+					StartOffsetMs = 25000,
+					StartOffsetSec = 25,
+					LengthMs = 75000,
+				},
+				new()
+				{
+					Title = "Book 1: Part 1: Chapter 2",
+					StartOffsetMs = 100000,
+					StartOffsetSec = 100,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "Book 1: Part 2: Chapter 3",
+					StartOffsetMs = 200000,
+					StartOffsetSec = 200,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "Book 1: Part 2: Chapter 4",
+					StartOffsetMs = 300000,
+					StartOffsetSec = 300,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "Book 2: Part 3",
+					StartOffsetMs = 400000,
+					StartOffsetSec = 400,
+					LengthMs = 22000,
+				},
+				new()
+				{
+					Title = "Book 2: Part 3: Chapter 5",
+					StartOffsetMs = 422000,
+					StartOffsetSec = 422,
+					LengthMs = 78000,
+				},
+				new()
+				{
+					Title = "Book 2: Part 3: Chapter 6",
+					StartOffsetMs = 500000,
+					StartOffsetSec = 500,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "Book 2: Part 4: Chapter 7",
+					StartOffsetMs = 600000,
+					StartOffsetSec = 600,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "Book 2: Part 4: Chapter 8",
+					StartOffsetMs = 700000,
+					StartOffsetSec = 700,
+					LengthMs = 100000,
+				},
+				new()
+				{
+					Title = "End Credits",
+					StartOffsetMs = 800000,
+					StartOffsetSec = 800,
+					LengthMs = 10000,
+				}
+			};
+			
+			var flatChapters = DownloadDecryptBook.flattenChapters(HierarchicalChapters_LongerParents);
+
+			checkChapters(flatChapters, expected);
+		}
+
 		private static void checkChapters(IList<Chapter> value, IList<Chapter> expected)
 		{
 			value.Count.Should().Be(expected.Count);