diff --git a/src/ImageSharp/Formats/Ani/AniDecoderCore.cs b/src/ImageSharp/Formats/Ani/AniDecoderCore.cs
index 57f9d4031f..e1cdba2ec1 100644
--- a/src/ImageSharp/Formats/Ani/AniDecoderCore.cs
+++ b/src/ImageSharp/Formats/Ani/AniDecoderCore.cs
@@ -78,6 +78,7 @@ internal class AniDecoderCore : ImageDecoderCore
                 {
                     case AniFrameFormat.Ico:
                         IcoFrameMetadata icoFrameMetadata = source.Metadata.GetIcoMetadata();
+
                         // TODO source.Metadata.SetFormatMetadata(IcoFormat.Instance, null);
                         clonedMetadata.IcoFrameMetadata = icoFrameMetadata;
                         clonedMetadata.EncodingWidth = icoFrameMetadata.EncodingWidth;
@@ -85,6 +86,7 @@ internal class AniDecoderCore : ImageDecoderCore
                         break;
                     case AniFrameFormat.Cur:
                         CurFrameMetadata curFrameMetadata = source.Metadata.GetCurMetadata();
+
                         // TODO source.Metadata.SetFormatMetadata(CurFormat.Instance, null);
                         clonedMetadata.CurFrameMetadata = curFrameMetadata;
                         clonedMetadata.EncodingWidth = curFrameMetadata.EncodingWidth;
@@ -198,6 +200,7 @@ internal class AniDecoderCore : ImageDecoderCore
                         {
                             case AniFrameFormat.Ico:
                                 IcoFrameMetadata icoFrameMetadata = frameMetadata.GetIcoMetadata();
+
                                 // TODO source.Metadata.SetFormatMetadata(IcoFormat.Instance, null);
                                 clonedMetadata.IcoFrameMetadata = icoFrameMetadata;
                                 clonedMetadata.EncodingWidth = icoFrameMetadata.EncodingWidth;
@@ -205,6 +208,7 @@ internal class AniDecoderCore : ImageDecoderCore
                                 break;
                             case AniFrameFormat.Cur:
                                 CurFrameMetadata curFrameMetadata = frameMetadata.GetCurMetadata();
+
                                 // TODO source.Metadata.SetFormatMetadata(CurFormat.Instance, null);
                                 clonedMetadata.CurFrameMetadata = curFrameMetadata;
                                 clonedMetadata.EncodingWidth = curFrameMetadata.EncodingWidth;
@@ -218,8 +222,9 @@ internal class AniDecoderCore : ImageDecoderCore
                         return frameMetadata;
                     }));
             }
-            else // BMP
+            else
             {
+                // BMP
                 aniFrameMetadata.EncodingWidth = Narrow(info.Width);
                 aniFrameMetadata.EncodingHeight = Narrow(info.Height);
                 aniFrameMetadata.FrameFormat = type;
@@ -253,6 +258,7 @@ internal class AniDecoderCore : ImageDecoderCore
 
                         switch (dir.Type)
                         {
+                            // TODO: Use Core decoders.
                             case IconFileType.CUR:
                                 info = CurDecoder.Instance.Identify(this.Options, this.currentStream);
                                 type = AniFrameFormat.Cur;
@@ -266,6 +272,7 @@ internal class AniDecoderCore : ImageDecoderCore
                 }
                 else
                 {
+                    // TODO: Use Core decoders.
                     info = BmpDecoder.Instance.Identify(this.Options, this.currentStream);
                     type = AniFrameFormat.Bmp;
                 }
diff --git a/src/ImageSharp/Formats/Ani/AniFrameMetadata.cs b/src/ImageSharp/Formats/Ani/AniFrameMetadata.cs
index f024c1c8ad..5af0b6fc7c 100644
--- a/src/ImageSharp/Formats/Ani/AniFrameMetadata.cs
+++ b/src/ImageSharp/Formats/Ani/AniFrameMetadata.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
-using System.Diagnostics.CodeAnalysis;
+using System.Numerics;
 using SixLabors.ImageSharp.Formats.Cur;
 using SixLabors.ImageSharp.Formats.Ico;
 using SixLabors.ImageSharp.PixelFormats;
@@ -68,12 +68,17 @@ public class AniFrameMetadata : IFormatFrameMetadata<AniFrameMetadata>
     IDeepCloneable IDeepCloneable.DeepClone() => this.DeepClone();
 
     /// <inheritdoc/>
-    public FormatConnectingFrameMetadata ToFormatConnectingFrameMetadata() => new FormatConnectingFrameMetadata() { Duration = TimeSpan.FromSeconds(this.FrameDelay / 60d) };
+    public FormatConnectingFrameMetadata ToFormatConnectingFrameMetadata()
+    {
+        // TODO: Implement. You need to consider encoding width/height.
+        return new() { Duration = TimeSpan.FromSeconds(this.FrameDelay / 60d) };
+    }
 
     /// <inheritdoc/>
-    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination)
+    public void AfterFrameApply<TPixel>(ImageFrame<TPixel> source, ImageFrame<TPixel> destination, Matrix4x4 matrix)
         where TPixel : unmanaged, IPixel<TPixel>
     {
+        // TODO: Implement. You need to consider encoding width/height.
     }
 
     /// <inheritdoc/>
@@ -83,7 +88,7 @@ public class AniFrameMetadata : IFormatFrameMetadata<AniFrameMetadata>
         EncodingHeight = this.EncodingHeight,
         EncodingWidth = this.EncodingWidth,
         SequenceNumber = this.SequenceNumber,
-        IsIco = this.IsIco,
+        FrameFormat = this.FrameFormat,
         IcoFrameMetadata = this.IcoFrameMetadata?.DeepClone(),
         CurFrameMetadata = this.CurFrameMetadata?.DeepClone(),
 
diff --git a/src/ImageSharp/Formats/Ani/AniMetadata.cs b/src/ImageSharp/Formats/Ani/AniMetadata.cs
index 1660b8a765..9b09cfa7a7 100644
--- a/src/ImageSharp/Formats/Ani/AniMetadata.cs
+++ b/src/ImageSharp/Formats/Ani/AniMetadata.cs
@@ -1,7 +1,7 @@
 // Copyright (c) Six Labors.
 // Licensed under the Six Labors Split License.
 
-using SixLabors.ImageSharp.Metadata;
+using System.Numerics;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace SixLabors.ImageSharp.Formats.Ani;
@@ -75,8 +75,8 @@ public class AniMetadata : IFormatMetadata<AniMetadata>
         => throw new NotImplementedException();
 
     /// <inheritdoc/>
-    public void AfterImageApply<TPixel>(Image<TPixel> destination)
-        where TPixel : unmanaged, IPixel<TPixel>
+    public void AfterImageApply<TPixel>(Image<TPixel> destination, Matrix4x4 matrix)
+            where TPixel : unmanaged, IPixel<TPixel>
     {
     }
 
diff --git a/src/ImageSharp/Formats/Webp/WebpConstants.cs b/src/ImageSharp/Formats/Webp/WebpConstants.cs
index b42e5313e2..7bee3c8c50 100644
--- a/src/ImageSharp/Formats/Webp/WebpConstants.cs
+++ b/src/ImageSharp/Formats/Webp/WebpConstants.cs
@@ -60,11 +60,6 @@ internal static class WebpConstants
         0x50 // P
     ];
 
-    /// <summary>
-    /// The header bytes identifying a Webp.
-    /// </summary>
-    public const string WebpFourCc = "WEBP";
-
     /// <summary>
     /// 3 bits reserved for version.
     /// </summary>
@@ -324,4 +319,9 @@ internal static class WebpConstants
         -7, 8,
         -8, -9
     ];
+
+    /// <summary>
+    /// Gets the header bytes identifying a Webp.
+    /// </summary>
+    public static ReadOnlySpan<byte> WebpFormTypeFourCc => "WEBP"u8;
 }