Add option to adjust minimum file duration

when splitting audiobooks into multiple files by chapter
2026-02-18 00:17:43 +01:00 · 2026-01-08 18:36:57 -07:00
parent dc58a101af
commit 068f37319f
10 changed files with 240 additions and 151 deletions
--- a/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs
+++ b/Source/AaxDecrypter/AaxcDownloadMultiConverter.cs
@@ -40,58 +40,14 @@ namespace AaxDecrypter
 			}
 		}

-		/*
-https://github.com/rmcrackan/Libation/pull/127#issuecomment-939088489

-If the chapter truly is empty, that is, 0 audio frames in length, then yes it is ignored.
-If the chapter is shorter than 3 seconds long but still has some audio frames, those frames are combined with the following chapter and not split into a new file.
-
-I also implemented file naming by chapter title. When 2 or more consecutive chapters are combined, the first of the combined chapter's title is used in the file name. For example, given an audiobook with the following chapters:
-
-00:00:00 - 00:00:02 | Part 1
-00:00:02 - 00:35:00 | Chapter 1
-00:35:02 - 01:02:00 | Chapter 2
-01:02:00 - 01:02:02 | Part 2
-01:02:02 - 01:41:00 | Chapter 3
-01:41:00 - 02:05:00 | Chapter 4
-
-The book will be split into the following files:
-
-00:00:00 - 00:35:00 | Book - 01 - Part 1.m4b
-00:35:00 - 01:02:00 | Book - 02 - Chapter 2.m4b
-01:02:00 - 01:41:00 | Book - 03 - Part 2.m4b
-01:41:00 - 02:05:00 | Book - 04 - Chapter 4.m4b
-
-That naming may not be desirable for everyone, but it's an easy change to instead use the last of the combined chapter's title in the file name.
-		 */
 		protected async override Task<bool> Step_DownloadAndDecryptAudiobookAsync()
 		{
 			if (AaxFile is null) return false;
-			var chapters = DownloadOptions.ChapterInfo.Chapters;
-
-			// Ensure split files are at least minChapterLength in duration.
-			var splitChapters = new ChapterInfo(DownloadOptions.ChapterInfo.StartOffset);
-
-			var runningTotal = TimeSpan.Zero;
-			string title = "";
-
-			for (int i = 0; i < chapters.Count; i++)
-			{
-				if (runningTotal == TimeSpan.Zero)
-					title = chapters[i].Title;
-
-				runningTotal += chapters[i].Duration;
-
-				if (runningTotal >= minChapterLength)
-				{
-					splitChapters.AddChapter(title, runningTotal);
-					runningTotal = TimeSpan.Zero;
-				}
-			}
-
+		
 			try
 			{
-				await (AaxConversion = decryptMultiAsync(AaxFile, splitChapters));
+				await (AaxConversion = decryptMultiAsync(AaxFile, DownloadOptions.ChapterInfo));

 				if (AaxConversion.IsCompletedSuccessfully)
 					await moveMoovToBeginning(AaxFile, workingFileStream?.Name);
--- a/Source/FileLiberator/DownloadOptions.Factory.cs
+++ b/Source/FileLiberator/DownloadOptions.Factory.cs
@@ -170,17 +170,6 @@ public partial class DownloadOptions
 	/// </summary>
 	public static DownloadOptions BuildDownloadOptions(LibraryBook libraryBook, Configuration config, LicenseInfo licInfo)
 	{
-		long chapterStartMs
-			= config.StripAudibleBrandAudio
-			? licInfo.ContentMetadata.ChapterInfo.BrandIntroDurationMs
-			: 0;
-
-		var dlOptions = new DownloadOptions(config, libraryBook, licInfo)
-		{
-			ChapterInfo = new AAXClean.ChapterInfo(TimeSpan.FromMilliseconds(chapterStartMs)),
-			RuntimeLength = TimeSpan.FromMilliseconds(licInfo.ContentMetadata.ChapterInfo.RuntimeLengthMs),
-		};
-
 		var titleConcat = config.CombineNestedChapterTitles ? ": " : null;
 		var chapters
 			= flattenChapters(licInfo.ContentMetadata.ChapterInfo.Chapters, titleConcat)
@@ -190,18 +179,22 @@ public partial class DownloadOptions
 		if (config.MergeOpeningAndEndCredits)
 			combineCredits(chapters);

+		if (config.StripAudibleBrandAudio)
+			stripBranding(chapters, licInfo.ContentMetadata.ChapterInfo.BrandIntroDurationMs, licInfo.ContentMetadata.ChapterInfo.BrandOutroDurationMs);
+
+		if (config.SplitFilesByChapter)
+			combineShortChapters(chapters, config.MinimumFileDuration * 1000);
+
+		var dlOptions = new DownloadOptions(config, libraryBook, licInfo)
+		{
+			ChapterInfo = new AAXClean.ChapterInfo(TimeSpan.FromMilliseconds(chapters[0].StartOffsetMs)),
+			RuntimeLength = TimeSpan.FromMilliseconds(licInfo.ContentMetadata.ChapterInfo.RuntimeLengthMs),
+		};
+
+		//Build AAXClean.ChapterInfo
 		for (int i = 0; i < chapters.Count; i++)
 		{
-			var chapter = chapters[i];
-			long chapLenMs = chapter.LengthMs;
-
-			if (i == 0)
-				chapLenMs -= chapterStartMs;
-
-			if (config.StripAudibleBrandAudio && i == chapters.Count - 1)
-				chapLenMs -= licInfo.ContentMetadata.ChapterInfo.BrandOutroDurationMs;
-
-			dlOptions.ChapterInfo.AddChapter(chapter.Title, TimeSpan.FromMilliseconds(chapLenMs));
+			dlOptions.ChapterInfo.AddChapter(chapters[i].Title, TimeSpan.FromMilliseconds(chapters[i].LengthMs));
 		}

 		return dlOptions;
@@ -349,6 +342,50 @@ public partial class DownloadOptions
 		return chaps;
 	}

+	/*
+	https://github.com/rmcrackan/Libation/pull/127#issuecomment-939088489
+
+	If the chapter truly is empty, that is, 0 audio frames in length, then yes it is ignored.
+	If the chapter is shorter than minChapterLength but still has some audio frames, those
+	frames are combined with the following chapter and not split into a new file.
+
+	When 2 or more consecutive chapters are combined, chapter titles are concatenated
+	with a apace in between. For example, given an audiobook with the following chapters:
+
+	00:00:00 - 00:00:02 | Part 1
+	00:00:02 - 00:35:00 | Chapter 1
+	00:35:02 - 01:02:00 | Chapter 2
+	01:02:00 - 01:02:02 | Part 2
+	01:02:02 - 01:41:00 | Chapter 3
+	01:41:00 - 02:05:00 | Chapter 4
+
+	The book will be split into the following files:
+
+	00:00:00 - 00:35:00 | Book - 01 - Part 1 Chapter 1.m4b
+	00:35:00 - 01:02:00 | Book - 02 - Chapter 2.m4b
+	01:02:00 - 01:41:00 | Book - 03 - Part 2.m4b
+	01:41:00 - 02:05:00 | Book - 04 - Chapter 4.m4b
+	*/
+	public static void combineShortChapters(List<Chapter> chapters, long minChapterLengthMs)
+	{
+		for (int i = 0; i < chapters.Count; i++)
+		{
+			while (chapters[i].LengthMs < minChapterLengthMs && chapters.Count > i + 1)
+			{
+				chapters[i].Title += " " + chapters[i + 1].Title;
+				chapters[i].LengthMs += chapters[i + 1].LengthMs;
+				chapters.RemoveAt(i + 1);
+			}
+		}
+	}
+
+	public static void stripBranding(List<Chapter> chapters, long introMs, long outroMs)
+	{
+		chapters[0].LengthMs -= introMs;
+		chapters[0].StartOffsetMs += introMs;
+		chapters[^1].LengthMs -= outroMs;
+	}
+
 	public static void combineCredits(IList<Chapter> chapters)
 	{
 		if (chapters.Count > 1 && chapters[0].Title == "Opening Credits")
--- a/Source/LibationAvalonia/App.axaml
+++ b/Source/LibationAvalonia/App.axaml
@@ -101,6 +101,29 @@
 				<Setter Property="BorderThickness" Value="2" />
 			</Style>
 		</Style>
+		
+		<Style Selector="NumericUpDown.SmallNumericUpDown">
+			<Setter Property="Height" Value="{DynamicResource TextControlThemeMinHeight}" />
+			<Setter Property="HorizontalContentAlignment" Value="Center" />
+			<Style Selector="^ /template/ ButtonSpinner#PART_Spinner">
+				<Style Selector="^ RepeatButton#PART_IncreaseButton">
+					<Setter Property="MinWidth" Value="24" />
+					<Style Selector="^ > PathIcon">
+						<Setter Property="Data">
+							M0,0 l8,-10 l8,10 Z
+						</Setter>
+					</Style>
+				</Style>
+				<Style Selector="^ RepeatButton#PART_DecreaseButton">
+					<Setter Property="MinWidth" Value="24" />
+					<Style Selector="^ > PathIcon">
+						<Setter Property="Data">
+							M0,0 l8,10 l8,-10 Z
+						</Setter>
+					</Style>
+				</Style>
+			</Style>
+		</Style>
 	</Application.Styles>

 	<NativeMenu.Menu>
--- a/Source/LibationAvalonia/Controls/Settings/Audio.axaml
+++ b/Source/LibationAvalonia/Controls/Settings/Audio.axaml
@@ -6,6 +6,7 @@
 			 xmlns:controls="clr-namespace:LibationAvalonia.Controls"
 			 xmlns:vm="clr-namespace:LibationAvalonia.ViewModels.Settings"
 			 x:DataType="vm:AudioSettingsVM"
+			 x:CompileBindings="True"
             x:Class="LibationAvalonia.Controls.Settings.Audio">
 	
 	<Grid
@@ -38,43 +39,43 @@
 			<Grid ColumnDefinitions="*,Auto">
 				<TextBlock
 					VerticalAlignment="Center"
-					Text="{CompiledBinding FileDownloadQualityText}" />
+					Text="{Binding FileDownloadQualityText}" />

 				<controls:WheelComboBox
 					Margin="5,0,0,0"
 					Grid.Column="1"
-					ItemsSource="{CompiledBinding DownloadQualities}"
-					SelectedItem="{CompiledBinding FileDownloadQuality}"/>
+					ItemsSource="{Binding DownloadQualities}"
+					SelectedItem="{Binding FileDownloadQuality}"/>
 			</Grid>

 			<Grid ColumnDefinitions="*,Auto">
 				<CheckBox
-					ToolTip.Tip="{CompiledBinding UseWidevineTip}"
+					ToolTip.Tip="{Binding UseWidevineTip}"
 					IsCheckedChanged="UseWidevine_IsCheckedChanged"
-					IsChecked="{CompiledBinding UseWidevine, Mode=TwoWay}">
-					<TextBlock Text="{CompiledBinding UseWidevineText}" />
+					IsChecked="{Binding UseWidevine, Mode=TwoWay}">
+					<TextBlock Text="{Binding UseWidevineText}" />
 				</CheckBox>
 				<CheckBox
 					Grid.Column="1"
-					ToolTip.Tip="{CompiledBinding Request_xHE_AACTip}"
-					IsEnabled="{CompiledBinding UseWidevine}"
-					IsChecked="{CompiledBinding Request_xHE_AAC, Mode=TwoWay}">
-					<TextBlock Text="{CompiledBinding Request_xHE_AACText}" />
+					ToolTip.Tip="{Binding Request_xHE_AACTip}"
+					IsEnabled="{Binding UseWidevine}"
+					IsChecked="{Binding Request_xHE_AAC, Mode=TwoWay}">
+					<TextBlock Text="{Binding Request_xHE_AACText}" />
 				</CheckBox>
 			</Grid>

 			<Grid ColumnDefinitions="*,Auto">
 				<CheckBox
-					ToolTip.Tip="{CompiledBinding RequestSpatialTip}"
-					IsEnabled="{CompiledBinding UseWidevine}"
-					IsChecked="{CompiledBinding RequestSpatial, Mode=TwoWay}">
-					<TextBlock Text="{CompiledBinding RequestSpatialText}" />
+					ToolTip.Tip="{Binding RequestSpatialTip}"
+					IsEnabled="{Binding UseWidevine}"
+					IsChecked="{Binding RequestSpatial, Mode=TwoWay}">
+					<TextBlock Text="{Binding RequestSpatialText}" />
 				</CheckBox>
 				<Grid
 					Grid.Column="1"
 					ColumnDefinitions="Auto,Auto"
 					VerticalAlignment="Top"
-					ToolTip.Tip="{CompiledBinding SpatialAudioCodecTip}">
+					ToolTip.Tip="{Binding SpatialAudioCodecTip}">
 					<Grid.IsEnabled>
 						<MultiBinding Converter="{x:Static BoolConverters.And}">
 							<MultiBinding.Bindings>
@@ -92,78 +93,100 @@
 						Margin="5,0,0,0"
 						Grid.Column="1"
 						VerticalAlignment="Center"
-						ItemsSource="{CompiledBinding SpatialAudioCodecs}"
-						SelectedItem="{CompiledBinding SpatialAudioCodec}"/>
+						ItemsSource="{Binding SpatialAudioCodecs}"
+						SelectedItem="{Binding SpatialAudioCodec}"/>
 				</Grid>
 				
 			</Grid>

-			<CheckBox IsChecked="{CompiledBinding CreateCueSheet, Mode=TwoWay}">
-				<TextBlock Text="{CompiledBinding CreateCueSheetText}" />
+			<CheckBox IsChecked="{Binding CreateCueSheet, Mode=TwoWay}">
+				<TextBlock Text="{Binding CreateCueSheetText}" />
 			</CheckBox>

-			<CheckBox IsChecked="{CompiledBinding DownloadCoverArt, Mode=TwoWay}">
-				<TextBlock Text="{CompiledBinding DownloadCoverArtText}" />
+			<CheckBox IsChecked="{Binding DownloadCoverArt, Mode=TwoWay}">
+				<TextBlock Text="{Binding DownloadCoverArtText}" />
 			</CheckBox>

 			<Grid ColumnDefinitions="*,Auto">
-				<CheckBox IsChecked="{CompiledBinding DownloadClipsBookmarks, Mode=TwoWay}">
+				<CheckBox IsChecked="{Binding DownloadClipsBookmarks, Mode=TwoWay}">
 					<TextBlock Text="Download Clips, Notes and Bookmarks as" />
 				</CheckBox>

 				<controls:WheelComboBox
 					Margin="5,0,0,0"
 					Grid.Column="1"
-					IsEnabled="{CompiledBinding DownloadClipsBookmarks}"
-					ItemsSource="{CompiledBinding ClipBookmarkFormats}"
-					SelectedItem="{CompiledBinding ClipBookmarkFormat}"/>
+					IsEnabled="{Binding DownloadClipsBookmarks}"
+					ItemsSource="{Binding ClipBookmarkFormats}"
+					SelectedItem="{Binding ClipBookmarkFormat}"/>
 			</Grid>

 			<CheckBox
-				IsChecked="{CompiledBinding RetainAaxFile, Mode=TwoWay}"
-				ToolTip.Tip="{CompiledBinding RetainAaxFileTip}">
-				<TextBlock Text="{CompiledBinding RetainAaxFileText}" />
+				IsChecked="{Binding RetainAaxFile, Mode=TwoWay}"
+				ToolTip.Tip="{Binding RetainAaxFileTip}">
+				<TextBlock Text="{Binding RetainAaxFileText}" />
 			</CheckBox>

 			<CheckBox
-				IsChecked="{CompiledBinding MergeOpeningAndEndCredits, Mode=TwoWay}"
-				ToolTip.Tip="{CompiledBinding MergeOpeningAndEndCreditsTip}">
-				<TextBlock Text="{CompiledBinding MergeOpeningEndCreditsText}" />
+				IsChecked="{Binding MergeOpeningAndEndCredits, Mode=TwoWay}"
+				ToolTip.Tip="{Binding MergeOpeningAndEndCreditsTip}">
+				<TextBlock Text="{Binding MergeOpeningEndCreditsText}" />
 			</CheckBox>

 			<CheckBox				
-				ToolTip.Tip="{CompiledBinding CombineNestedChapterTitlesTip}"
-				IsChecked="{CompiledBinding CombineNestedChapterTitles, Mode=TwoWay}">
-				<TextBlock Text="{CompiledBinding CombineNestedChapterTitlesText}" />
+				ToolTip.Tip="{Binding CombineNestedChapterTitlesTip}"
+				IsChecked="{Binding CombineNestedChapterTitles, Mode=TwoWay}">
+				<TextBlock Text="{Binding CombineNestedChapterTitlesText}" />
 			</CheckBox>

 			<CheckBox
-				ToolTip.Tip="{CompiledBinding AllowLibationFixupTip}"
-				IsChecked="{CompiledBinding AllowLibationFixup, Mode=TwoWay}">
-				<TextBlock Text="{CompiledBinding AllowLibationFixupText}" />
+				ToolTip.Tip="{Binding AllowLibationFixupTip}"
+				IsChecked="{Binding AllowLibationFixup, Mode=TwoWay}">
+				<TextBlock Text="{Binding AllowLibationFixupText}" />
 			</CheckBox>

 			<controls:GroupBox
 				Grid.Row="1"
 				Label="Audiobook Fix-ups"
-				IsEnabled="{CompiledBinding AllowLibationFixup}">
+				IsEnabled="{Binding AllowLibationFixup}">

 				<StackPanel Orientation="Vertical">

-					<CheckBox IsChecked="{CompiledBinding SplitFilesByChapter, Mode=TwoWay}">
-						<TextBlock Text="{CompiledBinding SplitFilesByChapterText}" />
+					<Grid
+						Margin="0,0,0,5"
+						Grid.ColumnDefinitions="Auto,Auto"
+						Grid.RowDefinitions="Auto,Auto">
+						
+						<CheckBox Margin="0" Grid.ColumnSpan="2" IsChecked="{Binding SplitFilesByChapter, Mode=TwoWay}">						
+							<TextBlock Grid.ColumnSpan="2" Text="{Binding SplitFilesByChapterText}" />						
+						</CheckBox>
+
+						<TextBlock Grid.Row="1" Margin="15,0" VerticalAlignment="Center" ToolTip.Tip="{Binding MinimumFileDurationTip}" Text="{Binding MinimumFileDurationText}" />
+							
+						<NumericUpDown
+							Classes="SmallNumericUpDown"
+							Grid.Column="1"
+							Grid.Row="1"
+							ToolTip.Tip="{Binding MinimumFileDurationTip}"
+							MinWidth="100"
+							Minimum="0"
+							Maximum="120"
+							Increment="1"
+							FormatString="N0"
+							ParsingNumberStyle="Integer"
+							IsEnabled="{Binding SplitFilesByChapter}"
+							Value="{Binding MinimumFileDuration, Mode=TwoWay}"/>
+					</Grid>
+
+					<CheckBox
+						IsChecked="{Binding StripAudibleBrandAudio, Mode=TwoWay}"
+						ToolTip.Tip="{Binding StripAudibleBrandAudioTip}">
+						<TextBlock Text="{Binding StripAudibleBrandingText}" />
 					</CheckBox>

 					<CheckBox
-						IsChecked="{CompiledBinding StripAudibleBrandAudio, Mode=TwoWay}"
-						ToolTip.Tip="{CompiledBinding StripAudibleBrandAudioTip}">
-						<TextBlock Text="{CompiledBinding StripAudibleBrandingText}" />
-					</CheckBox>
-
-					<CheckBox
-						IsChecked="{CompiledBinding StripUnabridged, Mode=TwoWay}"
-						ToolTip.Tip="{CompiledBinding StripUnabridgedTip}">
-						<TextBlock Text="{CompiledBinding StripUnabridgedText}" />
+						IsChecked="{Binding StripUnabridged, Mode=TwoWay}"
+						ToolTip.Tip="{Binding StripUnabridgedTip}">
+						<TextBlock Text="{Binding StripUnabridgedText}" />
 					</CheckBox>
 				</StackPanel>
 			</controls:GroupBox>
@@ -178,24 +201,24 @@
 			Margin="10,0,0,0">
 			
 			<RadioButton
-				IsChecked="{CompiledBinding !DecryptToLossy, Mode=TwoWay}"				
-				ToolTip.Tip="{CompiledBinding DecryptToLossyTip}">
+				IsChecked="{Binding !DecryptToLossy, Mode=TwoWay}"				
+				ToolTip.Tip="{Binding DecryptToLossyTip}">
 				
 				<StackPanel VerticalAlignment="Center">
 					<TextBlock
 						Text="Download my books in the original audio format (Lossless)" />
 					<CheckBox
-						IsEnabled="{CompiledBinding !DecryptToLossy}"
-						IsChecked="{CompiledBinding MoveMoovToBeginning, Mode=TwoWay}"
-						ToolTip.Tip="{CompiledBinding MoveMoovToBeginningTip}">
-						<TextBlock Text="{CompiledBinding MoveMoovToBeginningText}" />
+						IsEnabled="{Binding !DecryptToLossy}"
+						IsChecked="{Binding MoveMoovToBeginning, Mode=TwoWay}"
+						ToolTip.Tip="{Binding MoveMoovToBeginningTip}">
+						<TextBlock Text="{Binding MoveMoovToBeginningText}" />
 					</CheckBox>
 				</StackPanel>
 			</RadioButton>

 			<RadioButton
-				IsChecked="{CompiledBinding DecryptToLossy, Mode=TwoWay}"
-				ToolTip.Tip="{CompiledBinding DecryptToLossyTip}">
+				IsChecked="{Binding DecryptToLossy, Mode=TwoWay}"
+				ToolTip.Tip="{Binding DecryptToLossyTip}">
 				<TextBlock
 					TextWrapping="Wrap"
 					Text="Download my books as .MP3 files (transcode if necessary)" />
@@ -203,7 +226,7 @@

 			<controls:GroupBox
 				Grid.Column="1"
-				IsEnabled="{CompiledBinding DecryptToLossy}"
+				IsEnabled="{Binding DecryptToLossy}"
 				Label="Mp3 Encoding Options">

 				<Grid RowDefinitions="Auto,Auto,Auto,Auto,*">
@@ -220,21 +243,21 @@
 								<RadioButton
 									Margin="5"
 									Content="Bitrate"
-									IsChecked="{CompiledBinding LameTargetBitrate, Mode=TwoWay}"/>
+									IsChecked="{Binding LameTargetBitrate, Mode=TwoWay}"/>

 								<RadioButton
 									Grid.Column="1"
 									Margin="5"
 									Content="Quality"
-									IsChecked="{CompiledBinding !LameTargetBitrate, Mode=TwoWay}"/>
+									IsChecked="{Binding !LameTargetBitrate, Mode=TwoWay}"/>
 							</Grid>
 						</controls:GroupBox>

 						<CheckBox
 							HorizontalAlignment="Right"
 							Grid.Column="1"
-							IsChecked="{CompiledBinding LameDownsampleMono, Mode=TwoWay}"
-							ToolTip.Tip="{CompiledBinding LameDownsampleMonoTip}">
+							IsChecked="{Binding LameDownsampleMono, Mode=TwoWay}"
+							ToolTip.Tip="{Binding LameDownsampleMonoTip}">

 							<TextBlock
 								TextWrapping="Wrap"
@@ -249,8 +272,8 @@
 						<controls:WheelComboBox
 							Grid.Row="1"
 							HorizontalAlignment="Stretch"
-							ItemsSource="{CompiledBinding SampleRates}"
-							SelectedItem="{CompiledBinding SelectedSampleRate, Mode=TwoWay}"/>
+							ItemsSource="{Binding SampleRates}"
+							SelectedItem="{Binding SelectedSampleRate, Mode=TwoWay}"/>

 						<TextBlock Margin="0,0,0,5" Grid.Column="2" Text="Encoder Quality:" />

@@ -258,23 +281,23 @@
 							Grid.Column="2"
 							Grid.Row="1"
 							HorizontalAlignment="Stretch"
-							ItemsSource="{CompiledBinding EncoderQualities}"
-							SelectedItem="{CompiledBinding SelectedEncoderQuality, Mode=TwoWay}"/>
+							ItemsSource="{Binding EncoderQualities}"
+							SelectedItem="{Binding SelectedEncoderQuality, Mode=TwoWay}"/>
 					</Grid>

 					<controls:GroupBox
 						Grid.Row="2"
 						Margin="0,5"
 						Label="Bitrate"
-						IsEnabled="{CompiledBinding LameTargetBitrate}" >
+						IsEnabled="{Binding LameTargetBitrate}" >

 						<StackPanel>
 							<Grid ColumnDefinitions="*,25,Auto">

 								<Slider
 									Grid.Column="0"
-									IsEnabled="{CompiledBinding !LameMatchSource}"
-									Value="{CompiledBinding LameBitrate, Mode=TwoWay}"
+									IsEnabled="{Binding !LameMatchSource}"
+									Value="{Binding LameBitrate, Mode=TwoWay}"
 									Minimum="16"
 									Maximum="320"
 									IsSnapToTickEnabled="True" TickFrequency="16"
@@ -283,7 +306,7 @@

 									<Slider.Styles>
 										<Style Selector="Slider /template/ Thumb">
-											<Setter Property="ToolTip.Tip" Value="{CompiledBinding $parent[Slider].Value, Mode=OneWay, StringFormat='\{0:f0\} Kbps'}" />
+											<Setter Property="ToolTip.Tip" Value="{Binding $parent[Slider].Value, Mode=OneWay, StringFormat='\{0:f0\} Kbps'}" />
 											<Setter Property="ToolTip.Placement" Value="Top" />
 											<Setter Property="ToolTip.VerticalOffset" Value="-10" />
 											<Setter Property="ToolTip.HorizontalOffset" Value="-30" />
@@ -294,7 +317,7 @@
 								<TextBlock
 									Grid.Column="1"
 									HorizontalAlignment="Right"
-									Text="{CompiledBinding LameBitrate}" />
+									Text="{Binding LameBitrate}" />

 								<TextBlock
 									Grid.Column="2"
@@ -306,7 +329,7 @@

 								<CheckBox
 									Grid.Column="0"
-									IsChecked="{CompiledBinding LameConstantBitrate, Mode=TwoWay}">
+									IsChecked="{Binding LameConstantBitrate, Mode=TwoWay}">

 									<TextBlock
 										TextWrapping="Wrap"
@@ -317,7 +340,7 @@
 								<CheckBox
 									Grid.Column="1"
 									HorizontalAlignment="Right"
-									IsChecked="{CompiledBinding LameMatchSource, Mode=TwoWay}">
+									IsChecked="{Binding LameMatchSource, Mode=TwoWay}">

 									<TextBlock
 										TextWrapping="Wrap"
@@ -332,7 +355,7 @@
 						Grid.Row="3"
 						Margin="0,5"
 						Label="Quality"
-						IsEnabled="{CompiledBinding !LameTargetBitrate}">
+						IsEnabled="{Binding !LameTargetBitrate}">

 						<Grid
 							ColumnDefinitions="*,Auto,25"
@@ -341,7 +364,7 @@
 							<Slider
 								Grid.Column="0"
 								Grid.ColumnSpan="2"
-								Value="{CompiledBinding LameVBRQuality, Mode=TwoWay}"
+								Value="{Binding LameVBRQuality, Mode=TwoWay}"
 								Minimum="0"
 								Maximum="9"
 								IsSnapToTickEnabled="True" TickFrequency="1"
@@ -349,7 +372,7 @@
 								TickPlacement="Outside">
 								<Slider.Styles>
 									<Style Selector="Slider /template/ Thumb">
-										<Setter Property="ToolTip.Tip" Value="{CompiledBinding $parent[Slider].Value, Mode=OneWay, StringFormat='V\{0:f0\}'}" />
+										<Setter Property="ToolTip.Tip" Value="{Binding $parent[Slider].Value, Mode=OneWay, StringFormat='V\{0:f0\}'}" />
 										<Setter Property="ToolTip.Placement" Value="Top" />
 										<Setter Property="ToolTip.VerticalOffset" Value="-10" />
 										<Setter Property="ToolTip.HorizontalOffset" Value="-30" />
@@ -363,7 +386,7 @@
 								Orientation="Horizontal">

 								<TextBlock Text="V" />
-								<TextBlock Text="{CompiledBinding LameVBRQuality}" />
+								<TextBlock Text="{Binding LameVBRQuality}" />

 							</StackPanel>

@@ -397,8 +420,8 @@
 			Grid.Row="2"
 			Grid.ColumnSpan="2"
 			Margin="0,10,0,0"
-			IsEnabled="{CompiledBinding SplitFilesByChapter}"
-			Label="{CompiledBinding ChapterTitleTemplateText}">
+			IsEnabled="{Binding SplitFilesByChapter}"
+			Label="{Binding ChapterTitleTemplateText}">

 			<Grid ColumnDefinitions="*,Auto" Margin="0,8" >

@@ -406,7 +429,7 @@
 					Grid.Column="0"
 					FontSize="14"
 					IsReadOnly="True"
-					Text="{CompiledBinding ChapterTitleTemplate}" />
+					Text="{Binding ChapterTitleTemplate}" />

 				<Button
 					Grid.Column="1"
--- a/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs
+++ b/Source/LibationAvalonia/ViewModels/Settings/AudioSettingsVM.cs
@@ -39,6 +39,7 @@ namespace LibationAvalonia.ViewModels.Settings
 			DownloadClipsBookmarks = config.DownloadClipsBookmarks;
 			ClipBookmarkFormat = config.ClipsBookmarksFileFormat;
 			SplitFilesByChapter = config.SplitFilesByChapter;
+			MinimumFileDuration = config.MinimumFileDuration;
 			MergeOpeningAndEndCredits = config.MergeOpeningAndEndCredits;
 			StripAudibleBrandAudio = config.StripAudibleBrandAudio;
 			StripUnabridged = config.StripUnabridged;
@@ -71,6 +72,7 @@ namespace LibationAvalonia.ViewModels.Settings
 			config.DownloadClipsBookmarks = DownloadClipsBookmarks;
 			config.ClipsBookmarksFileFormat = ClipBookmarkFormat;
 			config.SplitFilesByChapter = SplitFilesByChapter;
+			config.MinimumFileDuration = MinimumFileDuration;
 			config.MergeOpeningAndEndCredits = MergeOpeningAndEndCredits;
 			config.StripAudibleBrandAudio = StripAudibleBrandAudio;
 			config.StripUnabridged = StripUnabridged;
@@ -118,6 +120,7 @@ namespace LibationAvalonia.ViewModels.Settings
 		public string DownloadCoverArtText { get; } = Configuration.GetDescription(nameof(Configuration.DownloadCoverArt));
 		public string RetainAaxFileText { get; } = Configuration.GetDescription(nameof(Configuration.RetainAaxFile));
 		public string SplitFilesByChapterText { get; } = Configuration.GetDescription(nameof(Configuration.SplitFilesByChapter));
+		public string MinimumFileDurationText { get; } = Configuration.GetDescription(nameof(Configuration.MinimumFileDuration));
 		public string MergeOpeningEndCreditsText { get; } = Configuration.GetDescription(nameof(Configuration.MergeOpeningAndEndCredits));
 		public string StripAudibleBrandingText { get; } = Configuration.GetDescription(nameof(Configuration.StripAudibleBrandAudio));
 		public string StripUnabridgedText { get; } = Configuration.GetDescription(nameof(Configuration.StripUnabridged));
@@ -146,6 +149,7 @@ namespace LibationAvalonia.ViewModels.Settings
 		public string StripUnabridgedTip => Configuration.GetHelpText(nameof(StripUnabridged));
 		public bool DecryptToLossy { get => field; set => this.RaiseAndSetIfChanged(ref field, value); }
 		public string DecryptToLossyTip => Configuration.GetHelpText(nameof(DecryptToLossy));
+		public string MinimumFileDurationTip => Configuration.GetHelpText(nameof(MinimumFileDuration));
 		public bool MoveMoovToBeginning { get; set; }

 		public bool LameDownsampleMono { get; set; } = Design.IsDesignMode;
@@ -153,6 +157,7 @@ namespace LibationAvalonia.ViewModels.Settings
 		public bool LameConstantBitrate { get; set; } = Design.IsDesignMode;

 		public bool SplitFilesByChapter { get => field; set { this.RaiseAndSetIfChanged(ref field, value); } }
+		public int MinimumFileDuration { get => field; set { this.RaiseAndSetIfChanged(ref field, value); } }
 		public bool LameTargetBitrate { get => field; set { this.RaiseAndSetIfChanged(ref field, value); } }
 		public bool LameMatchSource { get => field; set { this.RaiseAndSetIfChanged(ref field, value); } }
 		public int LameBitrate { get => field; set { this.RaiseAndSetIfChanged(ref field, value); } }
--- a/Source/LibationAvalonia/Views/ProcessQueueControl.axaml
+++ b/Source/LibationAvalonia/Views/ProcessQueueControl.axaml
@@ -58,7 +58,10 @@
 							</StackPanel.Styles>
 							<TextBlock Margin="0,0,6,0" FontSize="11" Text="DL&#xA;Limit" VerticalAlignment="Center" />
 							<NumericUpDown
+								Classes="SmallNumericUpDown"
+								MinWidth="100"
 								FontSize="12"
+								HorizontalContentAlignment="Center"
 								VerticalContentAlignment="Center"
 								TextConverter="{StaticResource myConverter}"
 								Height="{Binding #cancelAllBtn.DesiredSize.Height}"
--- a/Source/LibationFileManager/Configuration.HelpText.cs
+++ b/Source/LibationFileManager/Configuration.HelpText.cs
@@ -82,6 +82,13 @@ namespace LibationFileManager
                from the decrypted audiobook. This does not require
                re-encoding.
                """ },
+            {nameof(MinimumFileDuration), """
+                The minimum duration (in minutes) for an chapter to
+                be split into its own file. Chapters shorter than
+                this duration will be merged with the following
+                chapter. Merged chapter titles will be joined with
+                a space between them.
+                """ },
            {nameof(SpatialAudioCodec), """
                The Dolby Digital Plus (E-AC-3) codec is more widely
                supported than the AC-4 codec, but E-AC-3 files are
--- a/Source/LibationFileManager/Configuration.PersistentSettings.cs
+++ b/Source/LibationFileManager/Configuration.PersistentSettings.cs
@@ -169,6 +169,9 @@ namespace LibationFileManager
 		[Description("Split my books into multiple files by chapter")]
 		public bool SplitFilesByChapter { get => GetNonString(defaultValue: false); set => SetNonString(value); }

+		[Description("Minimum file duration (seconds)")]
+		public int MinimumFileDuration { get => Math.Max(0, GetNonString(defaultValue: 3)); set => SetNonString(value); }
+
 		[Description("Merge Opening/End Credits into the following/preceding chapters")]
 		public bool MergeOpeningAndEndCredits { get => GetNonString(defaultValue: false); set => SetNonString(value); }

--- a/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs
+++ b/Source/LibationWinForms/Dialogs/SettingsDialog.AudioSettings.cs
@@ -19,6 +19,7 @@ namespace LibationWinForms.Dialogs
 			this.retainAaxFileCbox.Text = desc(nameof(config.RetainAaxFile));
 			this.combineNestedChapterTitlesCbox.Text = desc(nameof(config.CombineNestedChapterTitles));
 			this.splitFilesByChapterCbox.Text = desc(nameof(config.SplitFilesByChapter));
+			this.minFileDurationLbl.Text = desc(nameof(config.MinimumFileDuration));
 			this.mergeOpeningEndCreditsCbox.Text = desc(nameof(config.MergeOpeningAndEndCredits));
 			this.stripAudibleBrandingCbox.Text = desc(nameof(config.StripAudibleBrandAudio));
 			this.stripUnabridgedCbox.Text = desc(nameof(config.StripUnabridged));
@@ -40,6 +41,8 @@ namespace LibationWinForms.Dialogs
 			toolTip.SetToolTip(requestSpatialCbox, Configuration.GetHelpText(nameof(config.RequestSpatial)));
 			toolTip.SetToolTip(request_xHE_AAC_Cbox, Configuration.GetHelpText(nameof(config.Request_xHE_AAC)));
 			toolTip.SetToolTip(spatialAudioCodecCb, Configuration.GetHelpText(nameof(config.SpatialAudioCodec)));
+			toolTip.SetToolTip(minFileDurationLbl, Configuration.GetHelpText(nameof(config.SpatialAudioCodec)));
+			toolTip.SetToolTip(minFileDurationNud, Configuration.GetHelpText(nameof(config.SpatialAudioCodec)));

 			fileDownloadQualityCb.Items.AddRange(
 				[
@@ -87,6 +90,7 @@ namespace LibationWinForms.Dialogs
 			retainAaxFileCbox.Checked = config.RetainAaxFile;
 			combineNestedChapterTitlesCbox.Checked = config.CombineNestedChapterTitles;
 			splitFilesByChapterCbox.Checked = config.SplitFilesByChapter;
+			minFileDurationNud.Value = config.MinimumFileDuration;
 			mergeOpeningEndCreditsCbox.Checked = config.MergeOpeningAndEndCredits;
 			stripUnabridgedCbox.Checked = config.StripUnabridged;
 			stripAudibleBrandingCbox.Checked = config.StripAudibleBrandAudio;
@@ -132,6 +136,7 @@ namespace LibationWinForms.Dialogs
 			config.RetainAaxFile = retainAaxFileCbox.Checked;
 			config.CombineNestedChapterTitles = combineNestedChapterTitlesCbox.Checked;
 			config.SplitFilesByChapter = splitFilesByChapterCbox.Checked;
+			config.MinimumFileDuration = (int)minFileDurationNud.Value;
 			config.MergeOpeningAndEndCredits = mergeOpeningEndCreditsCbox.Checked;
 			config.StripUnabridged = stripUnabridgedCbox.Checked;
 			config.StripAudibleBrandAudio = stripAudibleBrandingCbox.Checked;
@@ -167,7 +172,7 @@ namespace LibationWinForms.Dialogs

 		private void splitFilesByChapterCbox_CheckedChanged(object sender, EventArgs e)
 		{
-			chapterTitleTemplateGb.Enabled = splitFilesByChapterCbox.Checked;
+			chapterTitleTemplateGb.Enabled = minFileDurationNud.Enabled = minFileDurationLbl.Enabled = splitFilesByChapterCbox.Checked;
 		}

 		private void chapterTitleTemplateBtn_Click(object sender, EventArgs e)
--- a/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs
+++ b/Source/LibationWinForms/Dialogs/SettingsDialog.Designer.cs
@@ -99,6 +99,8 @@
 			clipsBookmarksFormatCb = new System.Windows.Forms.ComboBox();
 			downloadClipsBookmarksCbox = new System.Windows.Forms.CheckBox();
 			audiobookFixupsGb = new System.Windows.Forms.GroupBox();
+			minFileDurationLbl = new System.Windows.Forms.Label();
+			minFileDurationNud = new System.Windows.Forms.NumericUpDown();
 			stripUnabridgedCbox = new System.Windows.Forms.CheckBox();
 			chapterTitleTemplateGb = new System.Windows.Forms.GroupBox();
 			chapterTitleTemplateBtn = new System.Windows.Forms.Button();
@@ -154,6 +156,7 @@
 			customFileNamingGb.SuspendLayout();
 			tab4AudioFileOptions.SuspendLayout();
 			audiobookFixupsGb.SuspendLayout();
+			((System.ComponentModel.ISupportInitialize)minFileDurationNud).BeginInit();
 			chapterTitleTemplateGb.SuspendLayout();
 			lameOptionsGb.SuspendLayout();
 			lameBitrateGb.SuspendLayout();
@@ -289,7 +292,7 @@
 			// stripAudibleBrandingCbox
 			// 
 			stripAudibleBrandingCbox.AutoSize = true;
-			stripAudibleBrandingCbox.Location = new System.Drawing.Point(13, 70);
+			stripAudibleBrandingCbox.Location = new System.Drawing.Point(13, 88);
 			stripAudibleBrandingCbox.Name = "stripAudibleBrandingCbox";
 			stripAudibleBrandingCbox.Size = new System.Drawing.Size(143, 34);
 			stripAudibleBrandingCbox.TabIndex = 16;
@@ -960,20 +963,41 @@
 			// 
 			// audiobookFixupsGb
 			// 
+			audiobookFixupsGb.Controls.Add(minFileDurationLbl);
+			audiobookFixupsGb.Controls.Add(minFileDurationNud);
 			audiobookFixupsGb.Controls.Add(splitFilesByChapterCbox);
 			audiobookFixupsGb.Controls.Add(stripUnabridgedCbox);
 			audiobookFixupsGb.Controls.Add(stripAudibleBrandingCbox);
 			audiobookFixupsGb.Location = new System.Drawing.Point(6, 254);
 			audiobookFixupsGb.Name = "audiobookFixupsGb";
-			audiobookFixupsGb.Size = new System.Drawing.Size(416, 114);
+			audiobookFixupsGb.Size = new System.Drawing.Size(416, 128);
 			audiobookFixupsGb.TabIndex = 14;
 			audiobookFixupsGb.TabStop = false;
 			audiobookFixupsGb.Text = "Audiobook Fix-ups";
 			// 
+			// minFileDurationLbl
+			// 
+			minFileDurationLbl.AutoSize = true;
+			minFileDurationLbl.Location = new System.Drawing.Point(34, 44);
+			minFileDurationLbl.Margin = new System.Windows.Forms.Padding(0, 0, 2, 0);
+			minFileDurationLbl.Name = "minFileDurationLbl";
+			minFileDurationLbl.Size = new System.Drawing.Size(159, 15);
+			minFileDurationLbl.TabIndex = 29;
+			minFileDurationLbl.Text = "[MinimumFileDuration desc]";
+			// 
+			// minFileDurationNud
+			// 
+			minFileDurationNud.Location = new System.Drawing.Point(243, 41);
+			minFileDurationNud.Maximum = new decimal(new int[] { 120, 0, 0, 0 });
+			minFileDurationNud.Name = "minFileDurationNud";
+			minFileDurationNud.Size = new System.Drawing.Size(51, 23);
+			minFileDurationNud.TabIndex = 17;
+			minFileDurationNud.TextAlign = System.Windows.Forms.HorizontalAlignment.Center;
+			// 
 			// stripUnabridgedCbox
 			// 
 			stripUnabridgedCbox.AutoSize = true;
-			stripUnabridgedCbox.Location = new System.Drawing.Point(13, 46);
+			stripUnabridgedCbox.Location = new System.Drawing.Point(13, 63);
 			stripUnabridgedCbox.Name = "stripUnabridgedCbox";
 			stripUnabridgedCbox.Size = new System.Drawing.Size(147, 19);
 			stripUnabridgedCbox.TabIndex = 15;
@@ -1498,6 +1522,7 @@
 			tab4AudioFileOptions.PerformLayout();
 			audiobookFixupsGb.ResumeLayout(false);
 			audiobookFixupsGb.PerformLayout();
+			((System.ComponentModel.ISupportInitialize)minFileDurationNud).EndInit();
 			chapterTitleTemplateGb.ResumeLayout(false);
 			chapterTitleTemplateGb.PerformLayout();
 			lameOptionsGb.ResumeLayout(false);
@@ -1627,5 +1652,7 @@
 		private System.Windows.Forms.ComboBox themeCb;
 		private System.Windows.Forms.Label themeLbl;
 		private System.Windows.Forms.CheckBox importPlusTitlesCb;
+		private System.Windows.Forms.Label minFileDurationLbl;
+		private System.Windows.Forms.NumericUpDown minFileDurationNud;
 	}
 }