Webp files are not animated after cropping

[DrBenvey]

Description

I try to crop .webp
But they down have animation after i finish
Could u please provide an example of croping webp images

Code

private static Stream GetOutputStream(string name)
{
    return File.Open($"C:\\Users\\user\\Pictures\\animate\\output_{name}.webp", FileMode.OpenOrCreate);
}

private static Stream GetStream()
{
    return File.OpenRead("C:\\Users\\user\\Pictures\\animate\\2.webp");
}

public ImageCrop() 
{

    const int Width = 1200;
    const int Height = 1200;

    using var stream = GetStream();
    using var skData = SKData.Create(stream);
    using var codec = SKCodec.Create(skData);

    var supportedScale = codec
         .GetScaledDimensions((float)Width / codec.Info.Width);

    var nearest = new SKImageInfo(supportedScale.Width, supportedScale.Height);
    using var destinationImage = SKBitmap.Decode(codec, nearest);
    using var resizedImage = destinationImage.Resize(new SKImageInfo(Width, Height), SKFilterQuality.High);

    var format = SKEncodedImageFormat.Webp;
    using var outputImage = SKImage.FromBitmap(resizedImage);
    using var data = outputImage.Encode(format, 90);
    using var outputStream = GetOutputStream("skiasharp");
    data.SaveTo(outputStream);

    outputStream.Close();
    stream.Close();
}

Expected Behavior

new .webp image have animation

Actual Behavior

new .webp image dont have animation

Version of SkiaSharp

2.88.3 (Current)

Last Known Good Version of SkiaSharp

2.88.2 (Previous)

IDE / Editor

Visual Studio (Windows)

Platform / Operating System

Windows

Platform / Operating System Version

No response

Devices

No response

Relevant Screenshots

No response

Relevant Log Output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[mattleibow]

This happens because you are loading the animated image, but the resize method just resizes and return the first frame.

SkiaSharp is designed for drawing things to a screen as fast as possible. One of its limitations is the ability to generate complex files - like animated images or encoding codecs.

ImageSharp (https://github.com/SixLabors/ImageSharp) may be able to do this. That library focuses on image loading, manipulation and encoding - among other things.

I will close this issue for now as this particular feature is out of scope of SkiaSharp.