[AdvancedPaste]Add paste actions to allow transcoding of media files (#37188)

* [AdvancedPaste] Additional actions, including Image to text

* Spellcheck issue

* [AdvancedPaste] Paste as file and many other improvements

* Fixed typo

* Fixed typo

* [AdvancedPaste] Improved paste window menu layout

* [AdvancedPaste] Improved settings window layout

* [AdvancedPaste] Removed AudioToText for the moment

* Code cleanup

* Minor fixes

* [AdvancedPaste] Semantic Kernel support

* Changed log-line with potentially sensitive info

* Spellcheck issues

* Various improvements for Semantic Kernel

* Spellcheck issue

* Refactored Clipboard routines

* Added integration tests for KernelService

* Extra telemetry for AdvancedPaste

* Added 'Hotkey' suffix to AdvancedPaste_Settings telemetry event

* Added IsSavedQuery

* Added KernelQueryCache

* Refactoring

* Added KernelQueryCache to BugReportTool delete list

* Added opt-n for Semantic Kernel

* Fixed bug with KernelQueryCache

* Ability to view last AI chat message on error

* Improved kernel query cache

* Used System.IO.Abstractions and improved tests

* Fixed under-count of token usage

* Used Semantic Kernel icon

* Cleanup

* Add missing EndProject line

* Fix dependency version conflicts

* Fix NOTICE.md

* Correct place of SemanticKernel in NOTICE.md

* Unlinked CustomPreview toggle from AI

* Added Microsoft.Bcl.AsyncInterfaces dependency to AdvancedPaste

* Fixed NOTICE.md order

* Moved Custom Preview to behaviour section

* Made Image to Text raise error on empty output

* Added AIServiceBatchIntegrationTests

* Updated AIServiceBatchIntegrationTests

* Added prompt moderation

* [AdvancedPaste] Media Transcoding support

* Spellcheck issue

* Improved transcoding output profile and added tests

* Moved GPO Infobar to better location

* Added cancel button and minor bug fixes

* Fixed crash

* Minor cleanups

* Improved transcoding error messages

* Used software back when transcoding fails with hardware accerlation

* Added Reencode to spellcheck

* Spellcheck issue

---------

Co-authored-by: Jaime Bernardo <jaime@janeasystems.com>
Co-authored-by: Dustin L. Howett <dustin@howett.net>
Co-authored-by: Jeremy Sinclair <4016293+snickler@users.noreply.github.com>

.github/actions/spell-check/expect.txt

@@ -1283,7 +1283,7 @@ rectp
 RECTSOURCE
 recyclebin
 Redist
-reencode
+Reencode
 reencoded
 REFCLSID
 REFGUID

src/modules/AdvancedPaste/AdvancedPaste.UnitTests/Mocks/NoOpKernelQueryCacheService.cs

@@ -2,6 +2,7 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Models.KernelQueryCache;

src/modules/AdvancedPaste/AdvancedPaste.UnitTests/Mocks/NoOpProgress.cs

@@ -0,0 +1,14 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+
+namespace AdvancedPaste.UnitTests.Mocks;
+
+internal sealed class NoOpProgress : IProgress<double>
+{
+    public void Report(double value)
+    {
+    }
+}

src/modules/AdvancedPaste/AdvancedPaste.UnitTests/ServicesTests/AIServiceBatchIntegrationTests.cs

@@ -8,6 +8,7 @@ using System.IO;
 using System.Linq;
 using System.Text.Json;
 using System.Text.Json.Serialization;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -131,17 +132,18 @@ public sealed class AIServiceBatchIntegrationTests
     {
         VaultCredentialsProvider credentialsProvider = new();
         PromptModerationService promptModerationService = new(credentialsProvider);
+        NoOpProgress progress = new();
         CustomTextTransformService customTextTransformService = new(credentialsProvider, promptModerationService);
 
         switch (format)
         {
             case PasteFormats.CustomTextTransformation:
-                return DataPackageHelpers.CreateFromText(await customTextTransformService.TransformTextAsync(batchTestInput.Prompt, batchTestInput.Clipboard));
+                return DataPackageHelpers.CreateFromText(await customTextTransformService.TransformTextAsync(batchTestInput.Prompt, batchTestInput.Clipboard, CancellationToken.None, progress));
 
             case PasteFormats.KernelQuery:
                 var clipboardData = DataPackageHelpers.CreateFromText(batchTestInput.Clipboard).GetView();
                 KernelService kernelService = new(new NoOpKernelQueryCacheService(), credentialsProvider, promptModerationService, customTextTransformService);
-                return await kernelService.TransformClipboardAsync(batchTestInput.Prompt, clipboardData, isSavedQuery: false);
+                return await kernelService.TransformClipboardAsync(batchTestInput.Prompt, clipboardData, isSavedQuery: false, CancellationToken.None, progress);
 
             default:
                 throw new InvalidOperationException($"Unexpected format {format}");

src/modules/AdvancedPaste/AdvancedPaste.UnitTests/ServicesTests/KernelServiceIntegrationTests.cs

@@ -6,6 +6,7 @@ using System;
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -130,7 +131,7 @@ public sealed class KernelServiceIntegrationTests : IDisposable
 
     private async Task<DataPackageView> GetKernelOutputAsync(string prompt, DataPackage input)
     {
-        var output = await _kernelService.TransformClipboardAsync(prompt, input.GetView(), isSavedQuery: false);
+        var output = await _kernelService.TransformClipboardAsync(prompt, input.GetView(), isSavedQuery: false, CancellationToken.None, new NoOpProgress());
 
         Assert.AreEqual(1, _eventListener.SemanticKernelEvents.Count);
         Assert.IsTrue(_eventListener.SemanticKernelTokens > 0);

src/modules/AdvancedPaste/AdvancedPaste.UnitTests/ServicesTests/TranscodeHelperIntegrationTests.cs

@@ -0,0 +1,109 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+using AdvancedPaste.Helpers;
+using AdvancedPaste.Models;
+using AdvancedPaste.UnitTests.Mocks;
+using ManagedCommon;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using Windows.Storage;
+using Windows.Storage.FileProperties;
+
+namespace AdvancedPaste.UnitTests.ServicesTests;
+
+[TestClass]
+public sealed class TranscodeHelperIntegrationTests
+{
+    private sealed record class MediaProperties(BasicProperties Basic, MusicProperties Music, VideoProperties Video);
+
+    private const string InputRootFolder = @"%USERPROFILE%\AdvancedPasteTranscodeMediaTestData";
+
+    /// <summary> Tests transforming a folder of media files.
+    /// - Verifies that the output file has the same basic properties (e.g. duration) as the input file.
+    /// - Copies the output file to a subfolder of the input folder for manual inspection.
+    /// </summary>
+    [TestMethod]
+    [DataRow(@"audio", PasteFormats.TranscodeToMp3)]
+    [DataRow(@"video", PasteFormats.TranscodeToMp4)]
+    public async Task TestTransformFolder(string inputSubfolder, PasteFormats format)
+    {
+        var inputFolder = Environment.ExpandEnvironmentVariables(Path.Combine(InputRootFolder, inputSubfolder));
+
+        if (!Directory.Exists(inputFolder))
+        {
+            Assert.Inconclusive($"Skipping tests for {inputFolder} as it does not exist");
+        }
+
+        var outputPath = Path.Combine(inputFolder, $"test_output_{format}");
+
+        foreach (var inputPath in Directory.EnumerateFiles(inputFolder))
+        {
+            await RunTestTransformFileAsync(inputPath, outputPath, format);
+        }
+    }
+
+    private async Task RunTestTransformFileAsync(string inputPath, string finalOutputPath, PasteFormats format)
+    {
+        Logger.LogDebug($"Running {nameof(RunTestTransformFileAsync)} for {inputPath}/{format}");
+
+        Directory.CreateDirectory(finalOutputPath);
+
+        var inputPackage = await DataPackageHelpers.CreateFromFileAsync(inputPath);
+        var inputProperties = await GetPropertiesAsync(await StorageFile.GetFileFromPathAsync(inputPath));
+
+        var outputPackage = await TransformHelpers.TransformAsync(format, inputPackage.GetView(), CancellationToken.None, new NoOpProgress());
+
+        var outputItems = await outputPackage.GetView().GetStorageItemsAsync();
+        Assert.AreEqual(1, outputItems.Count);
+        var outputFile = outputItems.Single() as StorageFile;
+        Assert.IsNotNull(outputFile);
+        var outputProperties = await GetPropertiesAsync(outputFile);
+        AssertPropertiesMatch(format, inputProperties, outputProperties);
+
+        await outputFile.CopyAsync(await StorageFolder.GetFolderFromPathAsync(finalOutputPath), outputFile.Name, NameCollisionOption.ReplaceExisting);
+        await outputPackage.GetView().TryCleanupAfterDelayAsync(TimeSpan.Zero);
+    }
+
+    private static void AssertPropertiesMatch(PasteFormats format, MediaProperties inputProperties, MediaProperties outputProperties)
+    {
+        Assert.IsTrue(outputProperties.Basic.Size > 0);
+
+        Assert.AreEqual(inputProperties.Music.Title, outputProperties.Music.Title);
+        Assert.AreEqual(inputProperties.Music.Album, outputProperties.Music.Album);
+        Assert.AreEqual(inputProperties.Music.Artist, outputProperties.Music.Artist);
+        AssertDurationsApproxEqual(inputProperties.Music.Duration, outputProperties.Music.Duration);
+
+        if (format == PasteFormats.TranscodeToMp4)
+        {
+            Assert.AreEqual(inputProperties.Video.Title, outputProperties.Video.Title);
+            AssertDurationsApproxEqual(inputProperties.Video.Duration, outputProperties.Video.Duration);
+
+            var inputVideoDimensions = GetNormalizedDimensions(inputProperties.Video);
+            if (inputVideoDimensions != null)
+            {
+                Assert.AreEqual(inputVideoDimensions, GetNormalizedDimensions(outputProperties.Video));
+            }
+        }
+    }
+
+    private static async Task<MediaProperties> GetPropertiesAsync(StorageFile file) =>
+        new(await file.GetBasicPropertiesAsync(), await file.Properties.GetMusicPropertiesAsync(), await file.Properties.GetVideoPropertiesAsync());
+
+    private static void AssertDurationsApproxEqual(TimeSpan expected, TimeSpan actual) =>
+        Assert.AreEqual(expected.Ticks, actual.Ticks, delta: TimeSpan.FromSeconds(1).Ticks);
+
+    /// <summary>
+    /// Gets the dimensions of a video, if available. Accounts for the fact that the dimensions may sometimes be swapped.
+    /// </summary>
+    private static (uint Width, uint Height)? GetNormalizedDimensions(VideoProperties properties) =>
+        properties.Width == 0 || properties.Height == 0
+            ? null
+            : (Math.Max(properties.Width, properties.Height), Math.Min(properties.Width, properties.Height));
+}

src/modules/AdvancedPaste/AdvancedPaste/AdvancedPasteXAML/Controls/AnimatedContentControl/AnimatedContentControl.xaml

@@ -28,6 +28,7 @@
                                 Background="Transparent"
                                 BorderThickness="4"
                                 CornerRadius="{TemplateBinding CornerRadius}"
+                                IsHitTestVisible="False"
                                 Visibility="Collapsed">
                                 <!--  CornerRadius needs to be > 0  -->
                                 <Grid.BorderBrush>

src/modules/AdvancedPaste/AdvancedPaste/AdvancedPasteXAML/Controls/PromptBox.xaml

@@ -178,17 +178,36 @@
                                         Padding="0"
                                         HorizontalAlignment="Stretch"
                                         VerticalAlignment="Stretch">
-                                        <Image
+                                        <ProgressRing
-                                            x:Name="AIGlyphImage"
+                                            Width="30"
-                                            AutomationProperties.AccessibilityView="Raw"
+                                            Height="30"
-                                            Source="/Assets/AdvancedPaste/SemanticKernel.svg"
+                                            HorizontalAlignment="Right"
-                                            Visibility="{Binding DataContext.IsAdvancedAIEnabled, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource BoolToVisibilityConverter}}" />
+                                            VerticalAlignment="Center"
-                                        <PathIcon
+                                            IsActive="{Binding DataContext.IsBusy, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}"
-                                            x:Name="AIGlyph"
+                                            IsIndeterminate="{Binding DataContext.HasIndeterminateTransformProgress, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}"
-                                            AutomationProperties.AccessibilityView="Raw"
+                                            Maximum="100"
-                                            Data="M128 766q0-42 24-77t65-48l178-57q32-11 61-30t52-42q50-50 71-114l58-179q13-40 48-65t78-26q42 0 77 24t50 65l58 177q21 66 72 117 49 50 117 72l176 58q43 14 69 48t26 80q0 41-25 76t-64 49l-178 58q-66 21-117 72-32 32-51 73t-33 84-26 83-30 73-45 51-71 20q-42 0-77-24t-49-65l-58-178q-8-25-19-47t-28-43q-34-43-77-68t-89-41-89-27-78-29-55-45-21-75zm1149 7q-76-29-145-53t-129-60-104-88-73-138l-57-176-67 176q-18 48-42 89t-60 78q-34 34-76 61t-89 43l-177 57q75 29 144 53t127 60 103 89 73 137l57 176 67-176q37-97 103-168t168-103l177-57zm-125 759q0-31 20-57t49-36l99-32q34-11 53-34t30-51 20-59 20-54 33-41 58-16q32 0 59 19t38 50q6 20 11 40t13 40 17 38 25 34q16 17 39 26t48 18 49 16 44 20 31 32 12 50q0 33-18 60t-51 38q-19 6-39 11t-41 13-39 17-34 25q-24 25-35 62t-24 73-35 61-68 25q-32 0-59-19t-38-50q-6-18-11-39t-13-41-17-40-24-33q-18-17-41-27t-47-17-49-15-43-20-30-33-12-54zm583 4q-43-13-74-30t-55-41-40-55-32-74q-12 41-29 72t-42 55-55 42-71 31q81 23 128 71t71 129q15-43 31-74t40-54 53-40 75-32z"
+                                            Minimum="0"
-                                            Foreground="{ThemeResource TextFillColorSecondaryBrush}"
+                                            Visibility="{Binding DataContext.IsBusy, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource BoolToVisibilityConverter}}"
-                                            Visibility="{Binding DataContext.IsAdvancedAIEnabled, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BoolToInvertedVisibilityConverter}}" />
+                                            Value="{Binding DataContext.TransformProgress, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}" />
+
+                                        <StackPanel
+                                            Margin="0"
+                                            Padding="0"
+                                            HorizontalAlignment="Stretch"
+                                            VerticalAlignment="Stretch"
+                                            Visibility="{Binding DataContext.IsBusy, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource BoolToInvertedVisibilityConverter}}">
+                                            <Image
+                                                x:Name="AIGlyphImage"
+                                                AutomationProperties.AccessibilityView="Raw"
+                                                Source="/Assets/AdvancedPaste/SemanticKernel.svg"
+                                                Visibility="{Binding DataContext.IsAdvancedAIEnabled, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}, Converter={StaticResource BoolToVisibilityConverter}}" />
+                                            <PathIcon
+                                                x:Name="AIGlyph"
+                                                AutomationProperties.AccessibilityView="Raw"
+                                                Data="M128 766q0-42 24-77t65-48l178-57q32-11 61-30t52-42q50-50 71-114l58-179q13-40 48-65t78-26q42 0 77 24t50 65l58 177q21 66 72 117 49 50 117 72l176 58q43 14 69 48t26 80q0 41-25 76t-64 49l-178 58q-66 21-117 72-32 32-51 73t-33 84-26 83-30 73-45 51-71 20q-42 0-77-24t-49-65l-58-178q-8-25-19-47t-28-43q-34-43-77-68t-89-41-89-27-78-29-55-45-21-75zm1149 7q-76-29-145-53t-129-60-104-88-73-138l-57-176-67 176q-18 48-42 89t-60 78q-34 34-76 61t-89 43l-177 57q75 29 144 53t127 60 103 89 73 137l57 176 67-176q37-97 103-168t168-103l177-57zm-125 759q0-31 20-57t49-36l99-32q34-11 53-34t30-51 20-59 20-54 33-41 58-16q32 0 59 19t38 50q6 20 11 40t13 40 17 38 25 34q16 17 39 26t48 18 49 16 44 20 31 32 12 50q0 33-18 60t-51 38q-19 6-39 11t-41 13-39 17-34 25q-24 25-35 62t-24 73-35 61-68 25q-32 0-59-19t-38-50q-6-18-11-39t-13-41-17-40-24-33q-18-17-41-27t-47-17-49-15-43-20-30-33-12-54zm583 4q-43-13-74-30t-55-41-40-55-32-74q-12 41-29 72t-42 55-55 42-71 31q81 23 128 71t71 129q15-43 31-74t40-54 53-40 75-32z"
+                                                Foreground="{ThemeResource TextFillColorSecondaryBrush}"
+                                                Visibility="{Binding DataContext.IsAdvancedAIEnabled, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource BoolToInvertedVisibilityConverter}}" />
+                                        </StackPanel>
                                     </StackPanel>
                                 </Viewbox>
                                 <ScrollViewer
@@ -572,6 +591,24 @@
                                 Duration="0:0:0.167" />
                         </animations:Implicit.HideAnimations>
                     </Button>
+                    <Button
+                        x:Name="CancelBtn"
+                        x:Uid="CancelBtnAutomation"
+                        Padding="0"
+                        HorizontalAlignment="Stretch"
+                        VerticalAlignment="Stretch"
+                        ui:VisualExtensions.NormalizedCenterPoint="0.5,0.5"
+                        Command="{x:Bind CancelPasteActionCommand}"
+                        Content="{ui:FontIcon Glyph=&#xE711;,
+                                              FontSize=16}"
+                        Foreground="{ThemeResource AccentTextFillColorPrimaryBrush}"
+                        IsEnabled="False"
+                        Style="{StaticResource SubtleButtonStyle}"
+                        Visibility="Collapsed">
+                        <ToolTipService.ToolTip>
+                            <TextBlock x:Uid="CancelBtnToolTip" TextWrapping="WrapWholeWords" />
+                        </ToolTipService.ToolTip>
+                    </Button>
                     <!--  Transparent overlay to show tooltip  -->
                     <Grid
                         x:Name="SendBtnOverlay"
@@ -679,6 +716,10 @@
                         <Setter Target="Loader.IsLoading" Value="True" />
                         <Setter Target="InputTxtBox.IsEnabled" Value="False" />
                         <Setter Target="SendBtn.IsEnabled" Value="False" />
+                        <Setter Target="SendBtn.Visibility" Value="Collapsed" />
+                        <Setter Target="SendBtnOverlay.Visibility" Value="Collapsed" />
+                        <Setter Target="CancelBtn.IsEnabled" Value="True" />
+                        <Setter Target="CancelBtn.Visibility" Value="Visible" />
                         <Setter Target="DisclaimerPresenter.Visibility" Value="Collapsed" />
                         <Setter Target="LoadingText.Visibility" Value="Visible" />
                     </VisualState.Setters>

src/modules/AdvancedPaste/AdvancedPaste/AdvancedPasteXAML/Controls/PromptBox.xaml.cs

@@ -55,9 +55,9 @@ namespace AdvancedPaste.Controls
 
         private void ViewModel_PropertyChanged(object sender, PropertyChangedEventArgs e)
         {
-            if (e.PropertyName == nameof(ViewModel.Busy) || e.PropertyName == nameof(ViewModel.PasteActionError))
+            if (e.PropertyName is nameof(ViewModel.IsBusy) or nameof(ViewModel.PasteActionError))
             {
-                var state = ViewModel.Busy ? "LoadingState" : ViewModel.PasteActionError.HasText ? "ErrorState" : "DefaultState";
+                var state = ViewModel.IsBusy ? "LoadingState" : ViewModel.PasteActionError.HasText ? "ErrorState" : "DefaultState";
                 VisualStateManager.GoToState(this, state, true);
             }
         }
@@ -78,6 +78,9 @@ namespace AdvancedPaste.Controls
         [RelayCommand]
         private async Task GenerateCustomAIAsync() => await ViewModel.ExecuteCustomAIFormatFromCurrentQueryAsync(PasteActionSource.PromptBox);
 
+        [RelayCommand]
+        private async Task CancelPasteActionAsync() => await ViewModel.CancelPasteActionAsync();
+
         private async void InputTxtBox_KeyDown(object sender, Microsoft.UI.Xaml.Input.KeyRoutedEventArgs e)
         {
             if (e.Key == Windows.System.VirtualKey.Enter && InputTxtBox.Text.Length > 0 && ViewModel.IsCustomAIAvailable)

src/modules/AdvancedPaste/AdvancedPaste/AdvancedPasteXAML/MainWindow.xaml.cs

@@ -24,6 +24,7 @@ namespace AdvancedPaste
     {
         private readonly WindowMessageMonitor _msgMonitor;
         private readonly IUserSettings _userSettings;
+        private readonly OptionsViewModel _optionsViewModel;
 
         private bool _disposedValue;
 
@@ -32,8 +33,7 @@ namespace AdvancedPaste
             InitializeComponent();
 
             _userSettings = App.GetService<IUserSettings>();
-
+            _optionsViewModel = App.GetService<OptionsViewModel>();
-            var optionsViewModel = App.GetService<OptionsViewModel>();
 
             var baseHeight = MinHeight;
             var coreActionCount = PasteFormat.MetadataDict.Values.Count(metadata => metadata.IsCoreAction);
@@ -43,7 +43,7 @@ namespace AdvancedPaste
                 double GetHeight(int maxCustomActionCount) =>
                     baseHeight +
                     new PasteFormatsToHeightConverter().GetHeight(coreActionCount + _userSettings.AdditionalActions.Count) +
-                    new PasteFormatsToHeightConverter() { MaxItems = maxCustomActionCount }.GetHeight(optionsViewModel.IsCustomAIServiceEnabled ? _userSettings.CustomActions.Count : 0);
+                    new PasteFormatsToHeightConverter() { MaxItems = maxCustomActionCount }.GetHeight(_optionsViewModel.IsCustomAIServiceEnabled ? _userSettings.CustomActions.Count : 0);
 
                 MinHeight = GetHeight(1);
                 Height = GetHeight(5);
@@ -52,9 +52,9 @@ namespace AdvancedPaste
             UpdateHeight();
 
             _userSettings.Changed += (_, _) => UpdateHeight();
-            optionsViewModel.PropertyChanged += (_, e) =>
+            _optionsViewModel.PropertyChanged += (_, e) =>
             {
-                if (e.PropertyName == nameof(optionsViewModel.IsCustomAIServiceEnabled))
+                if (e.PropertyName == nameof(_optionsViewModel.IsCustomAIServiceEnabled))
                 {
                     UpdateHeight();
                 }
@@ -111,8 +111,9 @@ namespace AdvancedPaste
             GC.SuppressFinalize(this);
         }
 
-        private void WindowEx_Closed(object sender, Microsoft.UI.Xaml.WindowEventArgs args)
+        private async void WindowEx_Closed(object sender, Microsoft.UI.Xaml.WindowEventArgs args)
         {
+            await _optionsViewModel.CancelPasteActionAsync();
             Hide();
             args.Handled = true;
         }

src/modules/AdvancedPaste/AdvancedPaste/Helpers/DataPackageHelpers.cs

@@ -4,10 +4,14 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Text;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Models;
+using ManagedCommon;
+using Microsoft.Win32;
 using Windows.ApplicationModel.DataTransfer;
 using Windows.Data.Html;
 using Windows.Graphics.Imaging;
@@ -18,8 +22,6 @@ namespace AdvancedPaste.Helpers;
 
 internal static class DataPackageHelpers
 {
-    private static readonly Lazy<HashSet<string>> ImageFileTypes = new(GetImageFileTypes());
-
     private static readonly (string DataFormat, ClipboardFormat ClipboardFormat)[] DataFormats =
     [
         (StandardDataFormats.Text, ClipboardFormat.Text),
@@ -27,6 +29,14 @@ internal static class DataPackageHelpers
         (StandardDataFormats.Bitmap, ClipboardFormat.Image),
     ];
 
+    private static readonly Lazy<(ClipboardFormat Format, HashSet<string> FileTypes)[]> SupportedFileTypes =
+        new(() =>
+        [
+            (ClipboardFormat.Image, GetImageFileTypes()),
+            (ClipboardFormat.Audio, GetMediaFileTypes("audio")),
+            (ClipboardFormat.Video, GetMediaFileTypes("video")),
+        ]);
+
     internal static DataPackage CreateFromText(string text)
     {
         DataPackage dataPackage = new();
@@ -57,9 +67,12 @@ internal static class DataPackageHelpers
             {
                 availableFormats |= ClipboardFormat.File;
 
-                if (ImageFileTypes.Value.Contains(file.FileType))
+                foreach (var (format, fileTypes) in SupportedFileTypes.Value)
                 {
-                    availableFormats |= ClipboardFormat.Image;
+                    if (fileTypes.Contains(file.FileType))
+                    {
+                        availableFormats |= format;
+                    }
                 }
             }
         }
@@ -93,6 +106,60 @@ internal static class DataPackageHelpers
         return availableFormats == ClipboardFormat.Text ? !string.IsNullOrEmpty(await dataPackageView.GetTextAsync()) : availableFormats != ClipboardFormat.None;
     }
 
+    internal static async Task TryCleanupAfterDelayAsync(this DataPackageView dataPackageView, TimeSpan delay)
+    {
+        try
+        {
+            var tempFile = await GetSingleTempFileOrNullAsync(dataPackageView);
+
+            if (tempFile != null)
+            {
+                await Task.Delay(delay);
+
+                Logger.LogDebug($"Cleaning up temporary file with extension [{tempFile.Extension}] from data package after delay");
+
+                tempFile.Delete();
+                if (NormalizeDirectoryPath(tempFile.Directory?.Parent?.FullName) == NormalizeDirectoryPath(Path.GetTempPath()))
+                {
+                    tempFile.Directory?.Delete();
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            Logger.LogError("Failed to clean up temporary files", ex);
+        }
+    }
+
+    private static async Task<FileInfo> GetSingleTempFileOrNullAsync(this DataPackageView dataPackageView)
+    {
+        if (!dataPackageView.Contains(StandardDataFormats.StorageItems))
+        {
+            return null;
+        }
+
+        var storageItems = await dataPackageView.GetStorageItemsAsync();
+
+        if (storageItems.Count != 1 || storageItems.Single() is not StorageFile file)
+        {
+            return null;
+        }
+
+        FileInfo fileInfo = new(file.Path);
+        var tempPathDirectory = NormalizeDirectoryPath(Path.GetTempPath());
+
+        var directoryPaths = new[] { fileInfo.Directory, fileInfo.Directory?.Parent }
+                            .Where(directory => directory != null)
+                            .Select(directory => NormalizeDirectoryPath(directory.FullName));
+
+        return directoryPaths.Contains(NormalizeDirectoryPath(Path.GetTempPath())) ? fileInfo : null;
+    }
+
+    private static string NormalizeDirectoryPath(string path) =>
+        Path.GetFullPath(new Uri(path).LocalPath)
+            .TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
+            .ToUpperInvariant();
+
     internal static async Task<string> GetTextOrEmptyAsync(this DataPackageView dataPackageView) =>
         dataPackageView.Contains(StandardDataFormats.Text) ? await dataPackageView.GetTextAsync() : string.Empty;
 
@@ -153,4 +220,27 @@ internal static class DataPackageHelpers
                BitmapDecoder.GetDecoderInformationEnumerator()
                             .SelectMany(di => di.FileExtensions)
                             .ToHashSet(StringComparer.InvariantCultureIgnoreCase);
+
+    private static HashSet<string> GetMediaFileTypes(string mediaKind)
+    {
+        static string AssocQueryString(NativeMethods.AssocStr assocStr, string extension)
+        {
+            uint pcchOut = 0;
+
+            NativeMethods.AssocQueryString(NativeMethods.AssocF.None, assocStr, extension, null, null, ref pcchOut);
+
+            StringBuilder pszOut = new((int)pcchOut);
+            var hResult = NativeMethods.AssocQueryString(NativeMethods.AssocF.None, assocStr, extension, null, pszOut, ref pcchOut);
+            return hResult == NativeMethods.HResult.Ok ? pszOut.ToString() : string.Empty;
+        }
+
+        var comparison = StringComparison.OrdinalIgnoreCase;
+        var extensions = from extension in Registry.ClassesRoot.GetSubKeyNames()
+                         where extension.StartsWith('.')
+                         where AssocQueryString(NativeMethods.AssocStr.PerceivedType, extension).Equals(mediaKind, comparison) ||
+                               AssocQueryString(NativeMethods.AssocStr.ContentType, extension).StartsWith($"{mediaKind}/", comparison)
+                         select extension;
+
+        return extensions.ToHashSet(StringComparer.InvariantCultureIgnoreCase);
+    }
 }

src/modules/AdvancedPaste/AdvancedPaste/Helpers/KernelExtensions.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Models;
@@ -17,6 +18,8 @@ internal static class KernelExtensions
     private const string DataPackageKey = "DataPackage";
     private const string LastErrorKey = "LastError";
     private const string ActionChainKey = "ActionChain";
+    private const string CancellationTokenKey = "CancellationToken";
+    private const string ProgressKey = "Progress";
 
     internal static DataPackageView GetDataPackageView(this Kernel kernel)
     {
@@ -40,6 +43,14 @@ internal static class KernelExtensions
 
     internal static void SetDataPackageView(this Kernel kernel, DataPackageView dataPackageView) => kernel.Data[DataPackageKey] = dataPackageView;
 
+    internal static CancellationToken GetCancellationToken(this Kernel kernel) => kernel.Data.TryGetValue(CancellationTokenKey, out object value) ? (CancellationToken)value : CancellationToken.None;
+
+    internal static void SetCancellationToken(this Kernel kernel, CancellationToken cancellationToken) => kernel.Data[CancellationTokenKey] = cancellationToken;
+
+    internal static IProgress<double> GetProgress(this Kernel kernel) => kernel.Data.TryGetValue(ProgressKey, out object obj) ? obj as IProgress<double> : null;
+
+    internal static void SetProgress(this Kernel kernel, IProgress<double> progress) => kernel.Data[ProgressKey] = progress;
+
     internal static Exception GetLastError(this Kernel kernel) => kernel.Data.TryGetValue(LastErrorKey, out object obj) ? obj as Exception : null;
 
     internal static void SetLastError(this Kernel kernel, Exception error) => kernel.Data[LastErrorKey] = error;

src/modules/AdvancedPaste/AdvancedPaste/Helpers/NativeMethods.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Runtime.InteropServices;
+using System.Text;
 
 namespace AdvancedPaste.Helpers
 {
@@ -83,6 +84,68 @@ namespace AdvancedPaste.Helpers
             Scancode = 0x0008,
         }
 
+        public enum HResult
+        {
+            Ok = 0x0000,
+            False = 0x0001,
+            InvalidArguments = unchecked((int)0x80070057),
+            OutOfMemory = unchecked((int)0x8007000E),
+            NoInterface = unchecked((int)0x80004002),
+            Fail = unchecked((int)0x80004005),
+            ExtractionFailed = unchecked((int)0x8004B200),
+            ElementNotFound = unchecked((int)0x80070490),
+            TypeElementNotFound = unchecked((int)0x8002802B),
+            NoObject = unchecked((int)0x800401E5),
+            Win32ErrorCanceled = 1223,
+            Canceled = unchecked((int)0x800704C7),
+            ResourceInUse = unchecked((int)0x800700AA),
+            AccessDenied = unchecked((int)0x80030005),
+        }
+
+        [Flags]
+        public enum AssocF
+        {
+            None = 0,
+            Init_NoRemapCLSID = 0x1,
+            Init_ByExeName = 0x2,
+            Open_ByExeName = 0x3,
+            Init_DefaultToStar = 0x4,
+            Init_DefaultToFolder = 0x8,
+            NoUserSettings = 0x10,
+            NoTruncate = 0x20,
+            Verify = 0x40,
+            RemapRunDll = 0x80,
+            NoFixUps = 0x100,
+            IgnoreBaseClass = 0x200,
+        }
+
+        public enum AssocStr
+        {
+            Command = 1,
+            Executable,
+            FriendlyDocName,
+            FriendlyAppName,
+            NoOpen,
+            ShellNewValue,
+            DDECommand,
+            DDEIfExec,
+            DDEApplication,
+            DDETopic,
+            InfoTip,
+            QuickTip,
+            TileInfo,
+            ContentType,
+            DefaultIcon,
+            ShellExtension,
+            PerceivedType,
+            DelegateExecute,
+            SupportedUriProtocols,
+            ProgId,
+            AppId,
+            AppPublisher,
+            AppIconReference,
+        }
+
         [DllImport("user32.dll")]
         internal static extern uint SendInput(uint nInputs, INPUT[] pInputs, int cbSize);
 
@@ -100,5 +163,8 @@ namespace AdvancedPaste.Helpers
 
         [DllImport("user32.dll")]
         internal static extern bool GetCursorPos(out PointInter lpPoint);
+
+        [DllImport("Shlwapi.dll", SetLastError = true, CharSet = CharSet.Unicode)]
+        internal static extern HResult AssocQueryString(AssocF flags, AssocStr str, string pszAssoc, string pszExtra, [Out] StringBuilder pszOut, [In][Out] ref uint pcchOut);
     }
 }

src/modules/AdvancedPaste/AdvancedPaste/Helpers/OcrHelpers.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 
 using Windows.Globalization;
@@ -15,11 +16,14 @@ namespace AdvancedPaste.Helpers;
 
 public static class OcrHelpers
 {
-    public static async Task<string> ExtractTextAsync(SoftwareBitmap bitmap)
+    public static async Task<string> ExtractTextAsync(SoftwareBitmap bitmap, CancellationToken cancellationToken)
     {
         var ocrLanguage = GetOCRLanguage() ?? throw new InvalidOperationException("Unable to determine OCR language");
+        cancellationToken.ThrowIfCancellationRequested();
 
         var ocrEngine = OcrEngine.TryCreateFromLanguage(ocrLanguage) ?? throw new InvalidOperationException("Unable to create OCR engine");
+        cancellationToken.ThrowIfCancellationRequested();
+
         var ocrResult = await ocrEngine.RecognizeAsync(bitmap);
 
         return string.IsNullOrWhiteSpace(ocrResult.Text)

src/modules/AdvancedPaste/AdvancedPaste/Helpers/TranscodeHelpers.cs

@@ -0,0 +1,167 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+
+using AdvancedPaste.Models;
+using ManagedCommon;
+using Windows.ApplicationModel.DataTransfer;
+using Windows.Media.MediaProperties;
+using Windows.Media.Transcoding;
+using Windows.Storage;
+
+namespace AdvancedPaste.Helpers;
+
+internal static class TranscodeHelpers
+{
+    public static async Task<DataPackage> TranscodeToMp3Async(DataPackageView clipboardData, CancellationToken cancellationToken, IProgress<double> progress) =>
+        await TranscodeMediaAsync(clipboardData, MediaEncodingProfile.CreateMp3(AudioEncodingQuality.High), ".mp3", cancellationToken, progress);
+
+    public static async Task<DataPackage> TranscodeToMp4Async(DataPackageView clipboardData, CancellationToken cancellationToken, IProgress<double> progress) =>
+        await TranscodeMediaAsync(clipboardData, MediaEncodingProfile.CreateMp4(VideoEncodingQuality.HD1080p), ".mp4", cancellationToken, progress);
+
+    private static async Task<DataPackage> TranscodeMediaAsync(DataPackageView clipboardData, MediaEncodingProfile baseOutputProfile, string extension, CancellationToken cancellationToken, IProgress<double> progress)
+    {
+        Logger.LogTrace();
+
+        var inputFiles = await clipboardData.GetStorageItemsAsync();
+
+        if (inputFiles.Count != 1)
+        {
+            throw new InvalidOperationException($"{nameof(TranscodeMediaAsync)} does not support multiple files");
+        }
+
+        var inputFile = inputFiles.Single() as StorageFile ?? throw new InvalidOperationException($"{nameof(TranscodeMediaAsync)} only supports files");
+        var inputFileNameWithoutExtension = Path.GetFileNameWithoutExtension(inputFile.Path);
+
+        var inputProfile = await MediaEncodingProfile.CreateFromFileAsync(inputFile);
+        var outputProfile = CreateOutputProfile(inputProfile, baseOutputProfile);
+
+#if DEBUG
+        static string ProfileToString(MediaEncodingProfile profile) => System.Text.Json.JsonSerializer.Serialize(profile, options: new() { WriteIndented = true });
+        Logger.LogDebug($"{nameof(inputProfile)}: {ProfileToString(inputProfile)}");
+        Logger.LogDebug($"{nameof(outputProfile)}: {ProfileToString(outputProfile)}");
+#endif
+
+        var outputFolder = await Task.Run(() => Directory.CreateTempSubdirectory("PowerToys_AdvancedPaste_"), cancellationToken);
+        var outputFileName = StringComparer.OrdinalIgnoreCase.Equals(Path.GetExtension(inputFile.Path), extension) ? inputFileNameWithoutExtension + "_1" : inputFileNameWithoutExtension;
+        var outputFilePath = Path.Combine(outputFolder.FullName, Path.ChangeExtension(outputFileName, extension));
+        await File.WriteAllBytesAsync(outputFilePath, [], cancellationToken); // TranscodeAsync seems to require the output file to exist
+
+        await TranscodeMediaAsync(inputFile, await StorageFile.GetFileFromPathAsync(outputFilePath), outputProfile, cancellationToken, progress);
+
+        return await DataPackageHelpers.CreateFromFileAsync(outputFilePath);
+    }
+
+    private static MediaEncodingProfile CreateOutputProfile(MediaEncodingProfile inputProfile, MediaEncodingProfile baseOutputProfile)
+    {
+        MediaEncodingProfile outputProfile = new()
+        {
+            Video = null,
+            Audio = null,
+        };
+
+        outputProfile.Container = baseOutputProfile.Container.Copy();
+
+        if (inputProfile.Video != null && baseOutputProfile.Video != null)
+        {
+            outputProfile.Video = baseOutputProfile.Video.Copy();
+
+            if (inputProfile.Video.Bitrate != 0)
+            {
+                outputProfile.Video.Bitrate = inputProfile.Video.Bitrate;
+            }
+
+            if (inputProfile.Video.FrameRate.Numerator != 0)
+            {
+                outputProfile.Video.FrameRate.Numerator = inputProfile.Video.FrameRate.Numerator;
+            }
+
+            if (inputProfile.Video.FrameRate.Denominator != 0)
+            {
+                outputProfile.Video.FrameRate.Denominator = inputProfile.Video.FrameRate.Denominator;
+            }
+
+            if (inputProfile.Video.PixelAspectRatio.Numerator != 0)
+            {
+                outputProfile.Video.PixelAspectRatio.Numerator = inputProfile.Video.PixelAspectRatio.Numerator;
+            }
+
+            if (inputProfile.Video.PixelAspectRatio.Denominator != 0)
+            {
+                outputProfile.Video.PixelAspectRatio.Denominator = inputProfile.Video.PixelAspectRatio.Denominator;
+            }
+
+            outputProfile.Video.Width = inputProfile.Video.Width;
+            outputProfile.Video.Height = inputProfile.Video.Height;
+        }
+
+        if (inputProfile.Audio != null && baseOutputProfile.Audio != null)
+        {
+            outputProfile.Audio = baseOutputProfile.Audio.Copy();
+
+            if (inputProfile.Audio.Bitrate != 0)
+            {
+                outputProfile.Audio.Bitrate = inputProfile.Audio.Bitrate;
+            }
+
+            if (inputProfile.Audio.BitsPerSample != 0)
+            {
+                outputProfile.Audio.BitsPerSample = inputProfile.Audio.BitsPerSample;
+            }
+
+            if (inputProfile.Audio.ChannelCount != 0)
+            {
+                outputProfile.Audio.ChannelCount = inputProfile.Audio.ChannelCount;
+            }
+
+            if (inputProfile.Audio.SampleRate != 0)
+            {
+                outputProfile.Audio.SampleRate = inputProfile.Audio.SampleRate;
+            }
+        }
+
+        return outputProfile;
+    }
+
+    private static async Task TranscodeMediaAsync(StorageFile inputFile, StorageFile outputFile, MediaEncodingProfile outputProfile, CancellationToken cancellationToken, IProgress<double> progress)
+    {
+        if (outputProfile.Video == null && outputProfile.Audio == null)
+        {
+            throw new InvalidOperationException("Target profile does not contain media");
+        }
+
+        async Task<PrepareTranscodeResult> GetPrepareResult(bool hardwareAccelerationEnabled)
+        {
+            MediaTranscoder transcoder = new()
+            {
+                AlwaysReencode = false,
+                HardwareAccelerationEnabled = hardwareAccelerationEnabled,
+            };
+
+            return await transcoder.PrepareFileTranscodeAsync(inputFile, outputFile, outputProfile);
+        }
+
+        var prepareResult = await GetPrepareResult(hardwareAccelerationEnabled: true);
+
+        if (!prepareResult.CanTranscode)
+        {
+            Logger.LogWarning($"Unable to transcode with hardware acceleration enabled, falling back to software; {nameof(prepareResult.FailureReason)}={prepareResult.FailureReason}");
+
+            prepareResult = await GetPrepareResult(hardwareAccelerationEnabled: false);
+        }
+
+        if (!prepareResult.CanTranscode)
+        {
+            var message = ResourceLoaderInstance.ResourceLoader.GetString(prepareResult.FailureReason == TranscodeFailureReason.CodecNotFound ? "TranscodeErrorUnsupportedCodec" : "TranscodeErrorGeneral");
+            throw new PasteActionException(message, new InvalidOperationException($"Error transcoding; {nameof(prepareResult.FailureReason)}={prepareResult.FailureReason}"));
+        }
+
+        await prepareResult.TranscodeAsync().AsTask(cancellationToken, progress);
+    }
+}

src/modules/AdvancedPaste/AdvancedPaste/Helpers/TransformHelpers.cs

@@ -5,6 +5,7 @@
 using System;
 using System.Globalization;
 using System.IO;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Models;
@@ -17,17 +18,19 @@ namespace AdvancedPaste.Helpers;
 
 public static class TransformHelpers
 {
-    public static async Task<DataPackage> TransformAsync(PasteFormats format, DataPackageView clipboardData)
+    public static async Task<DataPackage> TransformAsync(PasteFormats format, DataPackageView clipboardData, CancellationToken cancellationToken, IProgress<double> progress)
     {
         return format switch
         {
             PasteFormats.PlainText => await ToPlainTextAsync(clipboardData),
             PasteFormats.Markdown => await ToMarkdownAsync(clipboardData),
             PasteFormats.Json => await ToJsonAsync(clipboardData),
-            PasteFormats.ImageToText => await ImageToTextAsync(clipboardData),
+            PasteFormats.ImageToText => await ImageToTextAsync(clipboardData, cancellationToken),
-            PasteFormats.PasteAsTxtFile => await ToTxtFileAsync(clipboardData),
+            PasteFormats.PasteAsTxtFile => await ToTxtFileAsync(clipboardData, cancellationToken),
-            PasteFormats.PasteAsPngFile => await ToPngFileAsync(clipboardData),
+            PasteFormats.PasteAsPngFile => await ToPngFileAsync(clipboardData, cancellationToken),
-            PasteFormats.PasteAsHtmlFile => await ToHtmlFileAsync(clipboardData),
+            PasteFormats.PasteAsHtmlFile => await ToHtmlFileAsync(clipboardData, cancellationToken),
+            PasteFormats.TranscodeToMp3 => await TranscodeHelpers.TranscodeToMp3Async(clipboardData, cancellationToken, progress),
+            PasteFormats.TranscodeToMp4 => await TranscodeHelpers.TranscodeToMp4Async(clipboardData, cancellationToken, progress),
             PasteFormats.KernelQuery => throw new ArgumentException($"Unsupported format {format}", nameof(format)),
             PasteFormats.CustomTextTransformation => throw new ArgumentException($"Unsupported format {format}", nameof(format)),
             _ => throw new ArgumentException($"Unknown value {format}", nameof(format)),
@@ -52,16 +55,16 @@ public static class TransformHelpers
         return CreateDataPackageFromText(await JsonHelper.ToJsonFromXmlOrCsvAsync(clipboardData));
     }
 
-    private static async Task<DataPackage> ImageToTextAsync(DataPackageView clipboardData)
+    private static async Task<DataPackage> ImageToTextAsync(DataPackageView clipboardData, CancellationToken cancellationToken)
     {
         Logger.LogTrace();
 
         var bitmap = await clipboardData.GetImageContentAsync() ?? throw new ArgumentException("No image content found in clipboard", nameof(clipboardData));
-        var text = await OcrHelpers.ExtractTextAsync(bitmap);
+        var text = await OcrHelpers.ExtractTextAsync(bitmap, cancellationToken);
         return CreateDataPackageFromText(text);
     }
 
-    private static async Task<DataPackage> ToPngFileAsync(DataPackageView clipboardData)
+    private static async Task<DataPackage> ToPngFileAsync(DataPackageView clipboardData, CancellationToken cancellationToken)
     {
         Logger.LogTrace();
 
@@ -72,25 +75,25 @@ public static class TransformHelpers
         encoder.SetSoftwareBitmap(clipboardBitmap);
         await encoder.FlushAsync();
 
-        return await CreateDataPackageFromFileContentAsync(pngStream.AsStreamForRead(), "png");
+        return await CreateDataPackageFromFileContentAsync(pngStream.AsStreamForRead(), "png", cancellationToken);
     }
 
-    private static async Task<DataPackage> ToTxtFileAsync(DataPackageView clipboardData)
+    private static async Task<DataPackage> ToTxtFileAsync(DataPackageView clipboardData, CancellationToken cancellationToken)
     {
         Logger.LogTrace();
 
         var text = await clipboardData.GetTextOrHtmlTextAsync();
-        return await CreateDataPackageFromFileContentAsync(text, "txt");
+        return await CreateDataPackageFromFileContentAsync(text, "txt", cancellationToken);
     }
 
-    private static async Task<DataPackage> ToHtmlFileAsync(DataPackageView clipboardData)
+    private static async Task<DataPackage> ToHtmlFileAsync(DataPackageView clipboardData, CancellationToken cancellationToken)
     {
         Logger.LogTrace();
 
         var cfHtml = await clipboardData.GetHtmlContentAsync();
         var html = RemoveHtmlMetadata(cfHtml);
 
-        return await CreateDataPackageFromFileContentAsync(html, "html");
+        return await CreateDataPackageFromFileContentAsync(html, "html", cancellationToken);
     }
 
     /// <summary>
@@ -114,7 +117,7 @@ public static class TransformHelpers
         return (startFragmentIndex == null || endFragmentIndex == null) ? cfHtml : cfHtml[startFragmentIndex.Value..endFragmentIndex.Value];
     }
 
-    private static async Task<DataPackage> CreateDataPackageFromFileContentAsync(string data, string fileExtension)
+    private static async Task<DataPackage> CreateDataPackageFromFileContentAsync(string data, string fileExtension, CancellationToken cancellationToken)
     {
         if (string.IsNullOrEmpty(data))
         {
@@ -123,16 +126,16 @@ public static class TransformHelpers
 
         var path = GetPasteAsFileTempFilePath(fileExtension);
 
-        await File.WriteAllTextAsync(path, data);
+        await File.WriteAllTextAsync(path, data, cancellationToken);
         return await DataPackageHelpers.CreateFromFileAsync(path);
     }
 
-    private static async Task<DataPackage> CreateDataPackageFromFileContentAsync(Stream stream, string fileExtension)
+    private static async Task<DataPackage> CreateDataPackageFromFileContentAsync(Stream stream, string fileExtension, CancellationToken cancellationToken)
     {
         var path = GetPasteAsFileTempFilePath(fileExtension);
 
         using var fileStream = File.Create(path);
-        await stream.CopyToAsync(fileStream);
+        await stream.CopyToAsync(fileStream, cancellationToken);
 
         return await DataPackageHelpers.CreateFromFileAsync(path);
     }

src/modules/AdvancedPaste/AdvancedPaste/Helpers/UserSettings.cs

@@ -108,7 +108,9 @@ namespace AdvancedPaste.Settings
                                     (PasteFormats.ImageToText, [sourceAdditionalActions.ImageToText]),
                                     (PasteFormats.PasteAsTxtFile, [sourceAdditionalActions.PasteAsFile, sourceAdditionalActions.PasteAsFile.PasteAsTxtFile]),
                                     (PasteFormats.PasteAsPngFile, [sourceAdditionalActions.PasteAsFile, sourceAdditionalActions.PasteAsFile.PasteAsPngFile]),
-                                    (PasteFormats.PasteAsHtmlFile, [sourceAdditionalActions.PasteAsFile, sourceAdditionalActions.PasteAsFile.PasteAsHtmlFile])
+                                    (PasteFormats.PasteAsHtmlFile, [sourceAdditionalActions.PasteAsFile, sourceAdditionalActions.PasteAsFile.PasteAsHtmlFile]),
+                                    (PasteFormats.TranscodeToMp3, [sourceAdditionalActions.Transcode, sourceAdditionalActions.Transcode.TranscodeToMp3]),
+                                    (PasteFormats.TranscodeToMp4, [sourceAdditionalActions.Transcode, sourceAdditionalActions.Transcode.TranscodeToMp4]),
                                 ];
 
                                 _additionalActions.Clear();

src/modules/AdvancedPaste/AdvancedPaste/Models/ClipboardFormat.cs

@@ -13,6 +13,7 @@ public enum ClipboardFormat
     Text = 1 << 0,
     Html = 1 << 1,
     Audio = 1 << 2,
-    Image = 1 << 3,
+    Video = 1 << 3,
-    File = 1 << 4, // output only for now
+    Image = 1 << 4,
+    File = 1 << 5, // output only for now
 }

src/modules/AdvancedPaste/AdvancedPaste/Models/PasteActionError.cs

@@ -30,7 +30,7 @@ public sealed class PasteActionError
     public static PasteActionError FromException(Exception ex) =>
         new()
         {
-            Text = ex is PasteActionException ? ex.Message : ResourceLoaderInstance.ResourceLoader.GetString("PasteError"),
+            Text = ex is PasteActionException ? ex.Message : ResourceLoaderInstance.ResourceLoader.GetString(ex is OperationCanceledException ? "PasteActionCanceled" : "PasteError"),
             Details = (ex as PasteActionException)?.AIServiceMessage ?? string.Empty,
         };
 }

src/modules/AdvancedPaste/AdvancedPaste/Models/PasteFormats.cs

@@ -82,12 +82,34 @@ public enum PasteFormats
         KernelFunctionDescription = "Takes HTML data in the clipboard and transforms it to an HTML file.")]
     PasteAsHtmlFile,
 
+    [PasteFormatMetadata(
+        IsCoreAction = false,
+        ResourceId = "TranscodeToMp3",
+        IconGlyph = "\uE8D6",
+        RequiresAIService = false,
+        CanPreview = false,
+        SupportedClipboardFormats = ClipboardFormat.Audio | ClipboardFormat.Video,
+        IPCKey = AdvancedPasteTranscodeAction.PropertyNames.TranscodeToMp3,
+        KernelFunctionDescription = "Takes an audio or video file in the clipboard and transcodes it to MP3.")]
+    TranscodeToMp3,
+
+    [PasteFormatMetadata(
+        IsCoreAction = false,
+        ResourceId = "TranscodeToMp4",
+        IconGlyph = "\uE714",
+        RequiresAIService = false,
+        CanPreview = false,
+        SupportedClipboardFormats = ClipboardFormat.Video,
+        IPCKey = AdvancedPasteTranscodeAction.PropertyNames.TranscodeToMp4,
+        KernelFunctionDescription = "Takes a video file in the clipboard and transcodes it to MP4 (H.264/AAC).")]
+    TranscodeToMp4,
+
     [PasteFormatMetadata(
         IsCoreAction = false,
         IconGlyph = "\uE945",
         RequiresAIService = true,
         CanPreview = true,
-        SupportedClipboardFormats = ClipboardFormat.Text | ClipboardFormat.Html | ClipboardFormat.Audio | ClipboardFormat.Image,
+        SupportedClipboardFormats = ClipboardFormat.Text | ClipboardFormat.Html | ClipboardFormat.Audio | ClipboardFormat.Video | ClipboardFormat.Image,
         RequiresPrompt = true)]
     KernelQuery,
 

src/modules/AdvancedPaste/AdvancedPaste/Services/ICustomTextTransformService.cs

@@ -2,11 +2,13 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace AdvancedPaste.Services;
 
 public interface ICustomTextTransformService
 {
-    Task<string> TransformTextAsync(string prompt, string inputText);
+    Task<string> TransformTextAsync(string prompt, string inputText, CancellationToken cancellationToken, IProgress<double> progress);
 }

src/modules/AdvancedPaste/AdvancedPaste/Services/IKernelService.cs

@@ -2,6 +2,8 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 using Windows.ApplicationModel.DataTransfer;
@@ -10,5 +12,5 @@ namespace AdvancedPaste.Services;
 
 public interface IKernelService
 {
-    Task<DataPackage> TransformClipboardAsync(string prompt, DataPackageView clipboardData, bool isSavedQuery);
+    Task<DataPackage> TransformClipboardAsync(string prompt, DataPackageView clipboardData, bool isSavedQuery, CancellationToken cancellationToken, IProgress<double> progress);
 }

src/modules/AdvancedPaste/AdvancedPaste/Services/IPasteFormatExecutor.cs

@@ -2,6 +2,8 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Models;
@@ -11,5 +13,5 @@ namespace AdvancedPaste.Services;
 
 public interface IPasteFormatExecutor
 {
-    Task<DataPackage> ExecutePasteFormatAsync(PasteFormat pasteFormat, PasteActionSource source);
+    Task<DataPackage> ExecutePasteFormatAsync(PasteFormat pasteFormat, PasteActionSource source, CancellationToken cancellationToken, IProgress<double> progress);
 }

src/modules/AdvancedPaste/AdvancedPaste/Services/IPromptModerationService.cs

@@ -2,11 +2,12 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace AdvancedPaste.Services;
 
 public interface IPromptModerationService
 {
-    Task ValidateAsync(string fullPrompt);
+    Task ValidateAsync(string fullPrompt, CancellationToken cancellationToken);
 }

src/modules/AdvancedPaste/AdvancedPaste/Services/KernelServiceBase.cs

@@ -6,6 +6,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text.Json;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -36,12 +37,14 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
 
     protected abstract AIServiceUsage GetAIServiceUsage(ChatMessageContent chatMessage);
 
-    public async Task<DataPackage> TransformClipboardAsync(string prompt, DataPackageView clipboardData, bool isSavedQuery)
+    public async Task<DataPackage> TransformClipboardAsync(string prompt, DataPackageView clipboardData, bool isSavedQuery, CancellationToken cancellationToken, IProgress<double> progress)
     {
         Logger.LogTrace();
 
         var kernel = CreateKernel();
         kernel.SetDataPackageView(clipboardData);
+        kernel.SetCancellationToken(cancellationToken);
+        kernel.SetProgress(progress);
 
         CacheKey cacheKey = new() { Prompt = prompt, AvailableFormats = await clipboardData.GetAvailableFormatsAsync() };
         var maybeCacheValue = _queryCacheService.ReadOrNull(cacheKey);
@@ -51,7 +54,7 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
 
         try
         {
-            (chatHistory, var usage) = cacheUsed ? await ExecuteCachedActionChain(kernel, maybeCacheValue.ActionChain) : await ExecuteAICompletion(kernel, prompt);
+            (chatHistory, var usage) = cacheUsed ? await ExecuteCachedActionChain(kernel, maybeCacheValue.ActionChain) : await ExecuteAICompletion(kernel, prompt, cancellationToken);
 
             LogResult(cacheUsed, isSavedQuery, kernel.GetOrAddActionChain(), usage);
 
@@ -84,7 +87,7 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
             AdvancedPasteSemanticKernelErrorEvent errorEvent = new(ex is PasteActionModeratedException ? PasteActionModeratedException.ErrorDescription : ex.Message);
             PowerToysTelemetry.Log.WriteEvent(errorEvent);
 
-            if (ex is PasteActionException)
+            if (ex is PasteActionException or OperationCanceledException)
             {
                 throw;
             }
@@ -127,7 +130,7 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
         return $"{combinedSystemMessage}{newLine}{newLine}User instructions:{newLine}{userPromptMessage.Content}";
     }
 
-    private async Task<(ChatHistory ChatHistory, AIServiceUsage Usage)> ExecuteAICompletion(Kernel kernel, string prompt)
+    private async Task<(ChatHistory ChatHistory, AIServiceUsage Usage)> ExecuteAICompletion(Kernel kernel, string prompt, CancellationToken cancellationToken)
     {
         ChatHistory chatHistory = [];
 
@@ -141,10 +144,10 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
         chatHistory.AddSystemMessage($"Available clipboard formats: {await kernel.GetDataFormatsAsync()}");
         chatHistory.AddUserMessage(prompt);
 
-        await _promptModerationService.ValidateAsync(GetFullPrompt(chatHistory));
+        await _promptModerationService.ValidateAsync(GetFullPrompt(chatHistory), cancellationToken);
 
         var chatResult = await kernel.GetRequiredService<IChatCompletionService>()
-                                     .GetChatMessageContentAsync(chatHistory, PromptExecutionSettings, kernel);
+                                     .GetChatMessageContentAsync(chatHistory, PromptExecutionSettings, kernel, cancellationToken);
         chatHistory.Add(chatResult);
 
         var totalUsage = chatHistory.Select(GetAIServiceUsage)
@@ -157,6 +160,8 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
     {
         foreach (var item in actionChain)
         {
+            kernel.GetCancellationToken().ThrowIfCancellationRequested();
+
             if (item.Arguments.Count > 0)
             {
                 await ExecutePromptTransformAsync(kernel, item.Format, item.Arguments[PromptParameterName]);
@@ -208,14 +213,14 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
             async dataPackageView =>
             {
                 var input = await dataPackageView.GetTextAsync();
-                string output = await GetPromptBasedOutput(format, prompt, input);
+                string output = await GetPromptBasedOutput(format, prompt, input, kernel.GetCancellationToken(), kernel.GetProgress());
                 return DataPackageHelpers.CreateFromText(output);
             });
 
-    private async Task<string> GetPromptBasedOutput(PasteFormats format, string prompt, string input) =>
+    private async Task<string> GetPromptBasedOutput(PasteFormats format, string prompt, string input, CancellationToken cancellationToken, IProgress<double> progress) =>
         format switch
         {
-            PasteFormats.CustomTextTransformation => await _customTextTransformService.TransformTextAsync(prompt, input),
+            PasteFormats.CustomTextTransformation => await _customTextTransformService.TransformTextAsync(prompt, input, cancellationToken, progress),
             _ => throw new ArgumentException($"Unsupported format {format} for prompt transform", nameof(format)),
         };
 
@@ -223,7 +228,7 @@ public abstract class KernelServiceBase(IKernelQueryCacheService queryCacheServi
         ExecuteTransformAsync(
            kernel,
            new ActionChainItem(format, Arguments: []),
-           async dataPackageView => await TransformHelpers.TransformAsync(format, dataPackageView));
+           async dataPackageView => await TransformHelpers.TransformAsync(format, dataPackageView, kernel.GetCancellationToken(), kernel.GetProgress()));
 
     private static async Task<string> ExecuteTransformAsync(Kernel kernel, ActionChainItem actionChainItem, Func<DataPackageView, Task<DataPackage>> transformFunc)
     {

src/modules/AdvancedPaste/AdvancedPaste/Services/OpenAI/CustomTextTransformService.cs

@@ -4,6 +4,7 @@
 
 using System;
 using System.Text.Json;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -23,11 +24,11 @@ public sealed class CustomTextTransformService(IAICredentialsProvider aiCredenti
     private readonly IAICredentialsProvider _aiCredentialsProvider = aiCredentialsProvider;
     private readonly IPromptModerationService _promptModerationService = promptModerationService;
 
-    private async Task<Completions> GetAICompletionAsync(string systemInstructions, string userMessage)
+    private async Task<Completions> GetAICompletionAsync(string systemInstructions, string userMessage, CancellationToken cancellationToken)
     {
         var fullPrompt = systemInstructions + "\n\n" + userMessage;
 
-        await _promptModerationService.ValidateAsync(fullPrompt);
+        await _promptModerationService.ValidateAsync(fullPrompt, cancellationToken);
 
         OpenAIClient azureAIClient = new(_aiCredentialsProvider.Key);
 
@@ -41,7 +42,8 @@ public sealed class CustomTextTransformService(IAICredentialsProvider aiCredenti
                 },
                 Temperature = 0.01F,
                 MaxTokens = 2000,
-            });
+            },
+            cancellationToken);
 
         if (response.Value.Choices[0].FinishReason == "length")
         {
@@ -51,7 +53,7 @@ public sealed class CustomTextTransformService(IAICredentialsProvider aiCredenti
         return response;
     }
 
-    public async Task<string> TransformTextAsync(string prompt, string inputText)
+    public async Task<string> TransformTextAsync(string prompt, string inputText, CancellationToken cancellationToken, IProgress<double> progress)
     {
         if (string.IsNullOrWhiteSpace(prompt))
         {
@@ -80,7 +82,7 @@ Output:
 
         try
         {
-            var response = await GetAICompletionAsync(systemInstructions, userMessage);
+            var response = await GetAICompletionAsync(systemInstructions, userMessage, cancellationToken);
 
             var usage = response.Usage;
             AdvancedPasteGenerateCustomFormatEvent telemetryEvent = new(usage.PromptTokens, usage.CompletionTokens, ModelName);
@@ -98,7 +100,7 @@ Output:
             AdvancedPasteGenerateCustomErrorEvent errorEvent = new(ex is PasteActionModeratedException ? PasteActionModeratedException.ErrorDescription : ex.Message);
             PowerToysTelemetry.Log.WriteEvent(errorEvent);
 
-            if (ex is PasteActionException)
+            if (ex is PasteActionException or OperationCanceledException)
             {
                 throw;
             }

src/modules/AdvancedPaste/AdvancedPaste/Services/OpenAI/PromptModerationService.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System.ClientModel;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -18,12 +19,12 @@ public sealed class PromptModerationService(IAICredentialsProvider aiCredentials
 
     private readonly IAICredentialsProvider _aiCredentialsProvider = aiCredentialsProvider;
 
-    public async Task ValidateAsync(string fullPrompt)
+    public async Task ValidateAsync(string fullPrompt, CancellationToken cancellationToken)
     {
         try
         {
             ModerationClient moderationClient = new(ModelName, _aiCredentialsProvider.Key);
-            var moderationClientResult = await moderationClient.ClassifyTextAsync(fullPrompt);
+            var moderationClientResult = await moderationClient.ClassifyTextAsync(fullPrompt, cancellationToken);
             var moderationResult = moderationClientResult.Value;
 
             Logger.LogDebug($"{nameof(PromptModerationService)}.{nameof(ValidateAsync)} complete; {nameof(moderationResult.Flagged)}={moderationResult.Flagged}");

src/modules/AdvancedPaste/AdvancedPaste/Services/PasteFormatExecutor.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -17,7 +18,7 @@ public sealed class PasteFormatExecutor(IKernelService kernelService, ICustomTex
     private readonly IKernelService _kernelService = kernelService;
     private readonly ICustomTextTransformService _customTextTransformService = customTextTransformService;
 
-    public async Task<DataPackage> ExecutePasteFormatAsync(PasteFormat pasteFormat, PasteActionSource source)
+    public async Task<DataPackage> ExecutePasteFormatAsync(PasteFormat pasteFormat, PasteActionSource source, CancellationToken cancellationToken, IProgress<double> progress)
     {
         if (!pasteFormat.IsEnabled)
         {
@@ -34,9 +35,9 @@ public sealed class PasteFormatExecutor(IKernelService kernelService, ICustomTex
         return await Task.Run(async () =>
             pasteFormat.Format switch
             {
-                PasteFormats.KernelQuery => await _kernelService.TransformClipboardAsync(pasteFormat.Prompt, clipboardData, pasteFormat.IsSavedQuery),
+                PasteFormats.KernelQuery => await _kernelService.TransformClipboardAsync(pasteFormat.Prompt, clipboardData, pasteFormat.IsSavedQuery, cancellationToken, progress),
-                PasteFormats.CustomTextTransformation => DataPackageHelpers.CreateFromText(await _customTextTransformService.TransformTextAsync(pasteFormat.Prompt, await clipboardData.GetTextAsync())),
+                PasteFormats.CustomTextTransformation => DataPackageHelpers.CreateFromText(await _customTextTransformService.TransformTextAsync(pasteFormat.Prompt, await clipboardData.GetTextAsync(), cancellationToken, progress)),
-                _ => await TransformHelpers.TransformAsync(format, clipboardData),
+                _ => await TransformHelpers.TransformAsync(format, clipboardData, cancellationToken, progress),
             });
     }
 

src/modules/AdvancedPaste/AdvancedPaste/Strings/en-us/Resources.resw

@@ -135,6 +135,9 @@
   <data name="OpenAIApiKeyError" xml:space="preserve">
     <value>OpenAI request failed with status code: </value>
   </data>
+  <data name="PasteActionCanceled" xml:space="preserve">
+    <value>The paste operation was canceled</value>
+  </data>
   <data name="PasteError" xml:space="preserve">
     <value>An error occurred during the paste operation</value>
   </data>
@@ -188,7 +191,19 @@
   </data>
   <data name="PasteAsHtmlFile" xml:space="preserve">
     <value>Paste as .html file</value>
+  </data>
+  <data name="TranscodeToMp3" xml:space="preserve">
+    <value>Transcode to .mp3</value>
   </data>  
+  <data name="TranscodeToMp4" xml:space="preserve">
+    <value>Transcode to .mp4 (H.264/AAC)</value>
+  </data>
+  <data name="TranscodeErrorGeneral" xml:space="preserve">
+    <value>An error occurred while transcoding media file</value>
+  </data>
+  <data name="TranscodeErrorUnsupportedCodec" xml:space="preserve">
+    <value>The media file contains an unsupported codec</value>
+  </data>
   <data name="PasteButtonAutomation.[using:Microsoft.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
     <value>Paste</value>
   </data>
@@ -207,6 +222,9 @@
   <data name="SendBtnToolTip.Text" xml:space="preserve">
     <value>Generate and paste data</value>
   </data>
+  <data name="CancelBtnToolTip.Text" xml:space="preserve">
+    <value>Cancel paste operation</value>
+  </data>
   <data name="RegenerateBtnToolTip.Text" xml:space="preserve">
     <value>Regenerate</value>
   </data>
@@ -216,6 +234,9 @@
   <data name="SendButtonAutomation.[using:Microsoft.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
     <value>Generate and paste data</value>
   </data>
+  <data name="CancelBtnAutomation.[using:Microsoft.UI.Xaml.Automation]AutomationProperties.Name" xml:space="preserve">
+    <value>Cancel paste operation</value>
+  </data>
   <data name="SettingsBtn.Content" xml:space="preserve">
     <value>Open settings</value>
   </data>

src/modules/AdvancedPaste/AdvancedPaste/ViewModels/OptionsViewModel.cs

@@ -8,6 +8,8 @@ using System.Collections.ObjectModel;
 using System.Diagnostics;
 using System.IO.Abstractions;
 using System.Linq;
+using System.Runtime.InteropServices;
+using System.Threading;
 using System.Threading.Tasks;
 
 using AdvancedPaste.Helpers;
@@ -29,7 +31,7 @@ using DispatcherQueue = Microsoft.UI.Dispatching.DispatcherQueue;
 
 namespace AdvancedPaste.ViewModels
 {
-    public sealed partial class OptionsViewModel : ObservableObject, IDisposable
+    public sealed partial class OptionsViewModel : ObservableObject, IProgress<double>, IDisposable
     {
         private readonly DispatcherQueue _dispatcherQueue = DispatcherQueue.GetForCurrentThread();
         private readonly DispatcherTimer _clipboardTimer;
@@ -37,6 +39,8 @@ namespace AdvancedPaste.ViewModels
         private readonly IPasteFormatExecutor _pasteFormatExecutor;
         private readonly IAICredentialsProvider _aiCredentialsProvider;
 
+        private CancellationTokenSource _pasteActionCancellationTokenSource;
+
         public DataPackageView ClipboardData { get; set; }
 
         [ObservableProperty]
@@ -65,7 +69,11 @@ namespace AdvancedPaste.ViewModels
         private bool _pasteFormatsDirty;
 
         [ObservableProperty]
-        private bool _busy;
+        private bool _isBusy;
+
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(HasIndeterminateTransformProgress))]
+        private double _transformProgress = double.NaN;
 
         public ObservableCollection<PasteFormat> StandardPasteFormats { get; } = [];
 
@@ -81,9 +89,24 @@ namespace AdvancedPaste.ViewModels
 
         public bool ClipboardHasDataForCustomAI => PasteFormat.SupportsClipboardFormats(CustomAIFormat, AvailableClipboardFormats);
 
+        public bool HasIndeterminateTransformProgress => double.IsNaN(TransformProgress);
+
         private PasteFormats CustomAIFormat => _userSettings.IsAdvancedAIEnabled ? PasteFormats.KernelQuery : PasteFormats.CustomTextTransformation;
 
-        private bool Visible => GetMainWindow()?.Visible is true;
+        private bool Visible
+        {
+            get
+            {
+                try
+                {
+                    return GetMainWindow()?.Visible is true;
+                }
+                catch (COMException)
+                {
+                    return false; // window is closed
+                }
+            }
+        }
 
         public event EventHandler PreviewRequested;
 
@@ -189,7 +212,12 @@ namespace AdvancedPaste.ViewModels
 
             void UpdateFormats(ObservableCollection<PasteFormat> collection, IEnumerable<PasteFormat> pasteFormats)
             {
-                collection.Clear();
+                // Hack: Clear collection via repeated RemoveAt to avoid this crash, which seems to occasionally occur when using Clear:
+                // https://github.com/microsoft/microsoft-ui-xaml/issues/8684
+                while (collection.Count > 0)
+                {
+                    collection.RemoveAt(collection.Count - 1);
+                }
 
                 foreach (var format in FilterAndSort(pasteFormats))
                 {
@@ -214,12 +242,13 @@ namespace AdvancedPaste.ViewModels
         public void Dispose()
         {
             _clipboardTimer.Stop();
+            _pasteActionCancellationTokenSource?.Dispose();
             GC.SuppressFinalize(this);
         }
 
         public async Task ReadClipboardAsync()
         {
-            if (Busy)
+            if (IsBusy)
             {
                 return;
             }
@@ -324,6 +353,10 @@ namespace AdvancedPaste.ViewModels
         {
             await ClipboardHelper.TryCopyPasteAsync(package, HideWindow);
             Query = string.Empty;
+
+            // Delete any temp files created. A delay is needed to ensure the file is not in use by the target application -
+            // for example, when pasting onto File Explorer, the paste operation will trigger a file copy.
+            _ = Task.Run(() => package.GetView().TryCleanupAfterDelayAsync(TimeSpan.FromSeconds(30)));
         }
 
         // Command to select the previous custom format
@@ -362,7 +395,7 @@ namespace AdvancedPaste.ViewModels
 
         internal async Task ExecutePasteFormatAsync(PasteFormat pasteFormat, PasteActionSource source)
         {
-            if (Busy)
+            if (IsBusy)
             {
                 Logger.LogWarning($"Execution of {pasteFormat.Format} from {source} suppressed as busy");
                 return;
@@ -377,16 +410,18 @@ namespace AdvancedPaste.ViewModels
             var elapsedWatch = Stopwatch.StartNew();
             Logger.LogDebug($"Started executing {pasteFormat.Format} from source {source}");
 
-            Busy = true;
+            IsBusy = true;
+            _pasteActionCancellationTokenSource = new();
+            TransformProgress = double.NaN;
             PasteActionError = PasteActionError.None;
             Query = pasteFormat.Query;
 
             try
             {
                 // Minimum time to show busy spinner for AI actions when triggered by global keyboard shortcut.
-                var aiActionMinTaskTime = TimeSpan.FromSeconds(2);
+                var aiActionMinTaskTime = TimeSpan.FromSeconds(1.5);
                 var delayTask = (Visible && source == PasteActionSource.GlobalKeyboardShortcut) ? Task.Delay(aiActionMinTaskTime) : Task.CompletedTask;
-                var dataPackage = await _pasteFormatExecutor.ExecutePasteFormatAsync(pasteFormat, source);
+                var dataPackage = await _pasteFormatExecutor.ExecutePasteFormatAsync(pasteFormat, source, _pasteActionCancellationTokenSource.Token, this);
 
                 await delayTask;
 
@@ -410,7 +445,9 @@ namespace AdvancedPaste.ViewModels
                 PasteActionError = PasteActionError.FromException(ex);
             }
 
-            Busy = false;
+            IsBusy = false;
+            _pasteActionCancellationTokenSource?.Dispose();
+            _pasteActionCancellationTokenSource = null;
             elapsedWatch.Stop();
             Logger.LogDebug($"Finished executing {pasteFormat.Format} from source {source}; timeTakenMs={elapsedWatch.ElapsedMilliseconds}");
         }
@@ -484,5 +521,26 @@ namespace AdvancedPaste.ViewModels
 
             return IsAllowedByGPO && _aiCredentialsProvider.Refresh();
         }
+
+        public async Task CancelPasteActionAsync()
+        {
+            if (_pasteActionCancellationTokenSource != null)
+            {
+                await _pasteActionCancellationTokenSource.CancelAsync();
+            }
+        }
+
+        void IProgress<double>.Report(double value)
+        {
+            ReportProgress(value);
+        }
+
+        private void ReportProgress(double value)
+        {
+            _dispatcherQueue.TryEnqueue(() =>
+            {
+                TransformProgress = value;
+            });
+        }
     }
 }

src/modules/AdvancedPaste/AdvancedPasteModuleInterface/trace.cpp

@@ -88,6 +88,8 @@ void Trace::AdvancedPaste_SettingsTelemetry(const PowertoyModuleIface::Hotkey& p
         TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"ImageToText"), "ImageToTextHotkey"),
         TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"PasteAsTxtFile"), "PasteAsTxtFileHotkey"),
         TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"PasteAsPngFile"), "PasteAsPngFileHotkey"),
-        TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"PasteAsHtmlFile"), "PasteAsHtmlFileHotkey")
+        TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"PasteAsHtmlFile"), "PasteAsHtmlFileHotkey"),
+        TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"TranscodeToMp3"), "TranscodeToMp3Hotkey"),
+        TraceLoggingWideString(getAdditionalActionHotkeyCStr(L"TranscodeToMp4"), "TranscodeToMp4Hotkey")
     );
 }

src/settings-ui/Settings.UI.Library/AdvancedPasteAdditionalAction.cs

@@ -2,6 +2,7 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
 using Microsoft.PowerToys.Settings.UI.Library.Helpers;
@@ -36,4 +37,7 @@ public sealed partial class AdvancedPasteAdditionalAction : Observable, IAdvance
         get => _isShown;
         set => Set(ref _isShown, value);
     }
+
+    [JsonIgnore]
+    public IEnumerable<IAdvancedPasteAction> SubActions => [];
 }

src/settings-ui/Settings.UI.Library/AdvancedPasteAdditionalActions.cs

@@ -14,6 +14,7 @@ public sealed class AdvancedPasteAdditionalActions
     {
         public const string ImageToText = "image-to-text";
         public const string PasteAsFile = "paste-as-file";
+        public const string Transcode = "transcode";
     }
 
     [JsonPropertyName(PropertyNames.ImageToText)]
@@ -22,6 +23,22 @@ public sealed class AdvancedPasteAdditionalActions
     [JsonPropertyName(PropertyNames.PasteAsFile)]
     public AdvancedPastePasteAsFileAction PasteAsFile { get; init; } = new();
 
-    [JsonIgnore]
+    [JsonPropertyName(PropertyNames.Transcode)]
-    public IEnumerable<IAdvancedPasteAction> AllActions => new IAdvancedPasteAction[] { ImageToText, PasteAsFile }.Concat(PasteAsFile.SubActions);
+    public AdvancedPasteTranscodeAction Transcode { get; init; } = new();
+
+    public IEnumerable<IAdvancedPasteAction> GetAllActions()
+    {
+        Queue<IAdvancedPasteAction> queue = new([ImageToText, PasteAsFile, Transcode]);
+
+        while (queue.Count != 0)
+        {
+            var action = queue.Dequeue();
+            yield return action;
+
+            foreach (var subAction in action.SubActions)
+            {
+                queue.Enqueue(subAction);
+            }
+        }
+    }
 }

src/settings-ui/Settings.UI.Library/AdvancedPasteCustomAction.cs

@@ -3,6 +3,7 @@
 // See the LICENSE file in the project root for more information.
 
 using System;
+using System.Collections.Generic;
 using System.Text.Json.Serialization;
 
 using Microsoft.PowerToys.Settings.UI.Library.Helpers;
@@ -98,6 +99,9 @@ public sealed class AdvancedPasteCustomAction : Observable, IAdvancedPasteAction
         private set => Set(ref _isValid, value);
     }
 
+    [JsonIgnore]
+    public IEnumerable<IAdvancedPasteAction> SubActions => [];
+
     public object Clone()
     {
         AdvancedPasteCustomAction clone = new();

src/settings-ui/Settings.UI.Library/AdvancedPastePasteAsFileAction.cs

@@ -52,5 +52,5 @@ public sealed class AdvancedPastePasteAsFileAction : Observable, IAdvancedPasteA
     }
 
     [JsonIgnore]
-    public IEnumerable<AdvancedPasteAdditionalAction> SubActions => [PasteAsTxtFile, PasteAsPngFile, PasteAsHtmlFile];
+    public IEnumerable<IAdvancedPasteAction> SubActions => [PasteAsTxtFile, PasteAsPngFile, PasteAsHtmlFile];
 }

src/settings-ui/Settings.UI.Library/AdvancedPasteTranscodeAction.cs

@@ -0,0 +1,47 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+using Microsoft.PowerToys.Settings.UI.Library.Helpers;
+
+namespace Microsoft.PowerToys.Settings.UI.Library;
+
+public sealed class AdvancedPasteTranscodeAction : Observable, IAdvancedPasteAction
+{
+    public static class PropertyNames
+    {
+        public const string TranscodeToMp3 = "transcode-to-mp3";
+        public const string TranscodeToMp4 = "transcode-to-mp4";
+    }
+
+    private AdvancedPasteAdditionalAction _transcodeToMp3 = new();
+    private AdvancedPasteAdditionalAction _transcodeToMp4 = new();
+    private bool _isShown = true;
+
+    [JsonPropertyName("isShown")]
+    public bool IsShown
+    {
+        get => _isShown;
+        set => Set(ref _isShown, value);
+    }
+
+    [JsonPropertyName(PropertyNames.TranscodeToMp3)]
+    public AdvancedPasteAdditionalAction TranscodeToMp3
+    {
+        get => _transcodeToMp3;
+        init => Set(ref _transcodeToMp3, value);
+    }
+
+    [JsonPropertyName(PropertyNames.TranscodeToMp4)]
+    public AdvancedPasteAdditionalAction TranscodeToMp4
+    {
+        get => _transcodeToMp4;
+        init => Set(ref _transcodeToMp4, value);
+    }
+
+    [JsonIgnore]
+    public IEnumerable<IAdvancedPasteAction> SubActions => [TranscodeToMp3, TranscodeToMp4];
+}

src/settings-ui/Settings.UI.Library/IAdvancedPasteAction.cs

@@ -2,6 +2,7 @@
 // The Microsoft Corporation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.Collections.Generic;
 using System.ComponentModel;
 
 namespace Microsoft.PowerToys.Settings.UI.Library;
@@ -9,4 +10,6 @@ namespace Microsoft.PowerToys.Settings.UI.Library;
 public interface IAdvancedPasteAction : INotifyPropertyChanged
 {
     public bool IsShown { get; }
+
+    public IEnumerable<IAdvancedPasteAction> SubActions { get; }
 }

src/settings-ui/Settings.UI/SettingsXAML/Views/AdvancedPaste.xaml

@@ -276,6 +276,37 @@
                             </tkcontrols:SettingsExpander.Items>
                         </tkcontrols:SettingsExpander>
 
+                        <tkcontrols:SettingsExpander
+                            x:Uid="Transcode"
+                            DataContext="{x:Bind ViewModel.AdditionalActions.Transcode, Mode=OneWay}"
+                            HeaderIcon="{ui:FontIcon Glyph=&#xEA69;}"
+                            IsExpanded="{Binding IsShown, Mode=OneWay}">
+                            <tkcontrols:SettingsExpander.Content>
+                                <ToggleSwitch
+                                    IsOn="{Binding IsShown, Mode=TwoWay}"
+                                    OffContent=""
+                                    OnContent="" />
+                            </tkcontrols:SettingsExpander.Content>
+                            <tkcontrols:SettingsExpander.Items>
+                                <!--  HACK: For some weird reason, a ShortcutControl does not work correctly if it's the first or last item in the expander, so we add an invisible card.  -->
+                                <tkcontrols:SettingsCard Visibility="Collapsed" />
+                                <tkcontrols:SettingsCard
+                                    x:Uid="TranscodeToMp3"
+                                    DataContext="{Binding TranscodeToMp3, Mode=TwoWay}"
+                                    IsEnabled="{x:Bind ViewModel.AdditionalActions.Transcode.IsShown, Mode=OneWay}">
+                                    <ContentControl ContentTemplate="{StaticResource AdditionalActionTemplate}" />
+                                </tkcontrols:SettingsCard>
+                                <tkcontrols:SettingsCard
+                                    x:Uid="TranscodeToMp4"
+                                    DataContext="{Binding TranscodeToMp4, Mode=TwoWay}"
+                                    IsEnabled="{x:Bind ViewModel.AdditionalActions.Transcode.IsShown, Mode=OneWay}">
+                                    <ContentControl ContentTemplate="{StaticResource AdditionalActionTemplate}" />
+                                </tkcontrols:SettingsCard>
+                                <!--  HACK: For some weird reason, a ShortcutControl does not work correctly if it's the first or last item in the expander, so we add an invisible card.  -->
+                                <tkcontrols:SettingsCard Visibility="Collapsed" />
+                            </tkcontrols:SettingsExpander.Items>
+                        </tkcontrols:SettingsExpander>
+
                         <InfoBar
                             x:Uid="AdvancedPaste_ShortcutWarning"
                             IsClosable="False"

src/settings-ui/Settings.UI/Strings/en-us/Resources.resw

@@ -1934,6 +1934,15 @@ Made with 💗 by Microsoft and the PowerToys community.</value>
   <data name="PasteAsHtmlFile.Header" xml:space="preserve">
     <value>Paste as .html file</value>
   </data>
+  <data name="Transcode.Header" xml:space="preserve">
+    <value>Transcode audio / video</value>
+  </data>
+  <data name="TranscodeToMp3.Header" xml:space="preserve">
+    <value>Transcode to .mp3</value>
+  </data>
+  <data name="TranscodeToMp4.Header" xml:space="preserve">
+    <value>Transcode to .mp4 (H.264/AAC)</value>
+  </data>
   <data name="AdvancedPaste_EnableAIDialogOpenAIApiKey.Text" xml:space="preserve">
     <value>OpenAI API key:</value>
   </data>

src/settings-ui/Settings.UI/ViewModels/AdvancedPasteViewModel.cs

@@ -84,7 +84,7 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
             _delayedTimer.Elapsed += DelayedTimer_Tick;
             _delayedTimer.AutoReset = false;
 
-            foreach (var action in _additionalActions.AllActions)
+            foreach (var action in _additionalActions.GetAllActions())
             {
                 action.PropertyChanged += OnAdditionalActionPropertyChanged;
             }
@@ -366,7 +366,7 @@ namespace Microsoft.PowerToys.Settings.UI.ViewModels
                           .Any(hotkey => WarnHotkeys.Contains(hotkey.ToString()));
 
         public bool IsAdditionalActionConflictingCopyShortcut =>
-            _additionalActions.AllActions
+            _additionalActions.GetAllActions()
                               .OfType<AdvancedPasteAdditionalAction>()
                               .Select(additionalAction => additionalAction.Shortcut)
                               .Any(hotkey => WarnHotkeys.Contains(hotkey.ToString()));