faster gif conversion

StabilityMatrix.Avalonia/ViewModels/Base/InferenceGenerationViewModelBase.cs

@@ -409,13 +409,20 @@ public abstract partial class InferenceGenerationViewModelBase : InferenceTabVie
                 );
 
                 // convert to gif
-                await GifConverter.ConvertWebpToGif(webpFilePath);
+                var inputStream = File.OpenRead(webpFilePath);
                 var gifFilePath = webpFilePath.ToString().Replace(".webp", ".gif");
-                if (File.Exists(gifFilePath))
-                {
-                    // delete webp
-                    File.Delete(webpFilePath);
-                }
+                var outputStream = File.OpenWrite(gifFilePath);
+
+                await GifConverter.ConvertAnimatedWebpToGifAsync(inputStream, outputStream);
+                await inputStream.DisposeAsync();
+                await outputStream.FlushAsync();
+                await outputStream.DisposeAsync();
+
+                // if (File.Exists(gifFilePath))
+                // {
+                //     // delete webp
+                //     File.Delete(webpFilePath);
+                // }
 
                 outputImages.Add(new ImageSource(gifFilePath));
                 EventManager.Instance.OnImageFileAdded(gifFilePath);

StabilityMatrix.Avalonia/ViewModels/Inference/InferenceImageToVideoViewModel.cs

@@ -65,6 +65,10 @@ public partial class InferenceImageToVideoViewModel : InferenceGenerationViewMod
     [JsonIgnore]
     private string outputUri;
 
+    [ObservableProperty]
+    [JsonIgnore]
+    private bool isGenerating;
+
     public InferenceImageToVideoViewModel(
         INotificationService notificationService,
         IInferenceClientManager inferenceClientManager,
@@ -94,6 +98,7 @@ public partial class InferenceImageToVideoViewModel : InferenceGenerationViewMod
             samplerCard.SelectedSampler = ComfySampler.Euler;
             samplerCard.SelectedScheduler = ComfyScheduler.Karras;
             samplerCard.IsDenoiseStrengthEnabled = true;
+            samplerCard.DenoiseStrength = 1.0f;
         });
 
         BatchSizeCardViewModel = vmFactory.Get<BatchSizeCardViewModel>();
@@ -118,6 +123,11 @@ public partial class InferenceImageToVideoViewModel : InferenceGenerationViewMod
         EventManager.Instance.ImageFileAdded += OnImageFileAdded;
     }
 
+    public override void OnUnloaded()
+    {
+        EventManager.Instance.ImageFileAdded -= OnImageFileAdded;
+    }
+
     private void OnImageFileAdded(object? sender, FilePath e)
     {
         if (!e.Extension.Contains("gif"))
@@ -219,11 +229,15 @@ public partial class InferenceImageToVideoViewModel : InferenceGenerationViewMod
             batchArgs.Add(generationArgs);
         }
 
+        IsGenerating = true;
+
         // Run batches
         foreach (var args in batchArgs)
         {
             await RunGeneration(args, cancellationToken);
         }
+
+        IsGenerating = false;
     }
 
     /// <inheritdoc />

StabilityMatrix.Avalonia/Views/Inference/InferenceImageToVideoView.axaml

@@ -94,9 +94,16 @@
                                 <Grid
                                     x:CompileBindings="False"
                                     DataContext="{Binding ElementName=Dock, Path=DataContext}">
-                                    <gif:GifImage
+                                    <controls:ImageGalleryCard
                                         Grid.Row="0"
-                                        SourceUri="{Binding OutputUri}" />
+                                        IsVisible="{Binding ElementName=Dock, Path=DataContext.IsGenerating}"
+                                        DataContext="{Binding ImageGalleryCardViewModel}"/>
+                                    <controls:Card Grid.Row="0" VerticalAlignment="Stretch"
+                                                   IsVisible="{Binding ElementName=Dock, Path=!DataContext.IsGenerating}">
+                                        <gif:GifImage
+                                            SourceUri="{Binding OutputUri}" 
+                                            Stretch="Uniform" />
+                                    </controls:Card>
                                     
                                     <StackPanel
                                         DataContext="{Binding OutputProgress}"

StabilityMatrix.Core/Animation/GifConverter.cs

@@ -1,14 +1,50 @@
-using ImageMagick;
-using StabilityMatrix.Core.Models.FileInterfaces;
+using KGySoft.Drawing.Imaging;
+using KGySoft.Drawing.SkiaSharp;
+using SkiaSharp;
 
 namespace StabilityMatrix.Core.Animation;
 
 public class GifConverter
 {
-    public static async Task ConvertWebpToGif(FilePath filePath)
+    public static IEnumerable<IReadableBitmapData> EnumerateAnimatedWebp(Stream webpSource)
     {
-        using var webp = new MagickImageCollection(filePath, MagickFormat.WebP);
-        var path = filePath.ToString().Replace(".webp", ".gif");
-        await webp.WriteAsync(path, MagickFormat.Gif).ConfigureAwait(false);
+        using var webp = new SKManagedStream(webpSource);
+        using var codec = SKCodec.Create(webp);
+
+        var info = new SKImageInfo(codec.Info.Width, codec.Info.Height);
+
+        for (var i = 0; i < codec.FrameCount; i++)
+        {
+            using var tempSurface = new SKBitmap(info);
+
+            codec.GetFrameInfo(i, out var frameInfo);
+
+            var decodeInfo = info.WithAlphaType(frameInfo.AlphaType);
+
+            tempSurface.TryAllocPixels(decodeInfo);
+
+            var result = codec.GetPixels(decodeInfo, tempSurface.GetPixels(), new SKCodecOptions(i));
+
+            if (result != SKCodecResult.Success)
+                throw new InvalidDataException($"Could not decode frame {i} of {codec.FrameCount}.");
+
+            using var peekPixels = tempSurface.PeekPixels();
+
+            yield return peekPixels.GetReadableBitmapData(WorkingColorSpace.Default);
+        }
+    }
+
+    public static Task ConvertAnimatedWebpToGifAsync(Stream webpSource, Stream gifOutput)
+    {
+        var gifBitmaps = EnumerateAnimatedWebp(webpSource);
+
+        return GifEncoder.EncodeAnimationAsync(
+            new AnimatedGifConfiguration(gifBitmaps, TimeSpan.FromMilliseconds(150))
+            {
+                Quantizer = OptimizedPaletteQuantizer.Wu(alphaThreshold: 0),
+                AllowDeltaFrames = true
+            },
+            gifOutput
+        );
     }
 }

StabilityMatrix.Core/Models/Database/LocalImageFile.cs

@@ -48,19 +48,9 @@ public record LocalImageFile
     /// </summary>
     public string FileNameWithoutExtension => Path.GetFileNameWithoutExtension(AbsolutePath);
 
-    public (
-        string? Parameters,
-        string? ParametersJson,
-        string? SMProject,
-        string? ComfyNodes
-    ) ReadMetadata()
+    public (string? Parameters, string? ParametersJson, string? SMProject, string? ComfyNodes) ReadMetadata()
     {
-        using var stream = new FileStream(
-            AbsolutePath,
-            FileMode.Open,
-            FileAccess.Read,
-            FileShare.Read
-        );
+        using var stream = new FileStream(AbsolutePath, FileMode.Open, FileAccess.Read, FileShare.Read);
         using var reader = new BinaryReader(stream);
 
         var parameters = ImageMetadata.ReadTextChunk(reader, "parameters");
@@ -79,8 +69,7 @@ public record LocalImageFile
     public static LocalImageFile FromPath(FilePath filePath)
     {
         // TODO: Support other types
-        const LocalImageFileType imageType =
-            LocalImageFileType.Inference | LocalImageFileType.TextToImage;
+        const LocalImageFileType imageType = LocalImageFileType.Inference | LocalImageFileType.TextToImage;
 
         // Get metadata
         using var stream = filePath.Info.OpenRead();
@@ -115,6 +104,5 @@ public record LocalImageFile
         };
     }
 
-    public static readonly HashSet<string> SupportedImageExtensions =
-        new() { ".png", ".jpg", ".jpeg", ".webp" };
+    public static readonly HashSet<string> SupportedImageExtensions = [".png", ".jpg", ".jpeg", ".gif"];
 }

StabilityMatrix.Core/StabilityMatrix.Core.csproj

@@ -29,6 +29,8 @@
       <PackageReference Include="DynamicData" Version="8.1.1" />
       <PackageReference Include="Hardware.Info" Version="100.0.0.1" />
       <PackageReference Include="JetBrains.Annotations" Version="2023.3.0" />
+      <PackageReference Include="KGySoft.Drawing.Core" Version="8.0.0" />
+      <PackageReference Include="KGySoft.Drawing.SkiaSharp" Version="8.0.0" />
       <PackageReference Include="LiteDB" Version="5.0.17" />
       <PackageReference Include="LiteDB.Async" Version="0.1.7" />
       <PackageReference Include="Magick.NET-Q8-x64" Version="13.5.0" />
@@ -51,6 +53,7 @@
       <PackageReference Include="Semver" Version="3.0.0-beta.1" />
       <PackageReference Include="Sentry.NLog" Version="3.41.0" />
       <PackageReference Include="SharpCompress" Version="0.34.2" />
+      <PackageReference Include="SkiaSharp" Version="2.88.6" />
       <PackageReference Include="Websocket.Client" Version="5.0.0" />
       <PackageReference Include="YamlDotNet" Version="13.7.1" />
       <PackageReference Include="Yoh.Text.Json.NamingPolicies" Version="1.0.0" />