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When load an animated webp image throws "SixLabors.ImageSharp.ImageFormatException: Unexpected chunk followed VP8X header" exception. #2154

@Hellobaka

Description

@Hellobaka

Prerequisites

  • I have written a descriptive issue title
  • I have verified that I am running the latest version of ImageSharp
  • I have verified if the problem exist in both DEBUG and RELEASE mode
  • I have searched open and closed issues to ensure it has not already been reported

ImageSharp version

2.1.2

Other ImageSharp packages and versions

SixLabors.ImageSharp.Drawing 1.0.0-beta14; Sixlabors.Fonts 1.0.0-beta17

Environment (Operating system, version and so on)

Win10 21H2

.NET Framework version

.net 5.0.402

Description

https://mathiasbynens.be/demo/animated-webp-supported.webp

I have seen the feature support PR, but I still cannot load animated webp images. Maybe the method I used is wrong.

Steps to Reproduce

  1. download the example image
  2. load with code
Image img = Image.Load(@"1.webp");

then exception throws.

Unhandled exception. SixLabors.ImageSharp.ImageFormatException: Unexpected chunk followed VP8X header
   at SixLabors.ImageSharp.Formats.Webp.WebpThrowHelper.ThrowImageFormatException(String errorMessage)
   at SixLabors.ImageSharp.Formats.Webp.WebpDecoderCore.ReadVp8XHeader()
   at SixLabors.ImageSharp.Formats.Webp.WebpDecoderCore.ReadVp8Info()
   at SixLabors.ImageSharp.Formats.Webp.WebpDecoderCore.Decode[TPixel](BufferedReadStream stream, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Formats.ImageDecoderUtilities.Decode[TPixel](IImageDecoderInternals decoder, Configuration configuration, Stream stream, Func`3
largeImageExceptionFactory, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Formats.ImageDecoderUtilities.Decode[TPixel](IImageDecoderInternals decoder, Configuration configuration, Stream stream, Cancell
ationToken cancellationToken)
   at SixLabors.ImageSharp.Formats.Webp.WebpDecoder.Decode[TPixel](Configuration configuration, Stream stream, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Formats.Webp.WebpDecoder.Decode(Configuration configuration, Stream stream, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Image.Decode(Stream stream, Configuration config, CancellationToken cancellationToken)
   at SixLabors.ImageSharp.Image.<>c__DisplayClass134_0.<Load>b__0(Stream s)
   at SixLabors.ImageSharp.Image.WithSeekableStream[T](Configuration configuration, Stream stream, Func`2 action)
   at SixLabors.ImageSharp.Image.Load(Configuration configuration, Stream stream, IImageFormat& format)
   at SixLabors.ImageSharp.Image.Load(Configuration configuration, String path, IImageFormat& format)
   at SixLabors.ImageSharp.Image.Load(Configuration configuration, String path)
   at SixLabors.ImageSharp.Image.Load(String path)
   at BilibiliMonitor.Program.Main(String[] args) in E:\编程\程序c#\BilibiliMonitor\BilibiliMonitor\Program.cs:line 19

Images

test img

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