Error insufficient image data in webp file

[victorKH]

Magick.NET version

magick.net-q16-x86.9.0.0.nupkg, magick.net-q16-x86.12.2.1.nupkg, magick.net-q8-x86.13.5.0.nupkg, magick.net-q16-x86.13.5.0.nupkg

Environment (Operating system, version and so on)

Windows 10, 32bit

Description

I try to use Magick.Net with this code (from stackoverflow)

using (var magickImages = new MagickImageCollection(filePath)) // Exception in this line
{
if (magickImages.Count > 1)
{
string newFilePath = FileHelpers.GenerateNewFilePath(Path.ChangeExtension(filePath, ".gif"));
using (FileStream fs = new FileStream(newFilePath, FileMode.Create))
{
magickImages.Write(fs, MagickFormat.Gif);
}
}
else
{
string newFilePath = FileHelpers.GenerateNewFilePath(Path.ChangeExtension(filePath, ".png"));
using (FileStream fs = new FileStream(newFilePath, FileMode.Create))
{
magickImages.Write(fs, MagickFormat.Png);
}
}
}

and got Exception when opening file for both sample files with message

insufficient image data in file sher3.webp' @ error/webp.c/ReadWEBPImage/563 insufficient image data in file sher3l.webp' @ error/webp.c/ReadWEBPImage/563
images.zip

Steps to Reproduce

To reproduce use above code with attached images.zip.

I try following Magick.Net nuget packages (with correspondent dependencies):

magick.net-q16-x86.6.8.9.501.nupkg
magick.net-q16-x86.9.0.0.nupkg
magick.net-q16-x86.12.2.1.nupkg
magick.net-q8-x86.13.5.0.nupkg
magick.net-q16-x86.13.5.0.nupkg

and only v.6.8.9.501 open both files successfully, all other - fail with above messages.

I try to use ImageMagick command tool (ImageMagick-7.1.1-27-Q16-x86-dll.exe) and
file 'sher3.webp' success and for 'sher3l.webp' got this:

magick convert sher3l.webp sher3l.png
convert: insufficient image data in file sher3l.webp' @ error/webp.c/ReadWEBPImage/580. convert: no images defined sher3l.png' @ error/convert.c/ConvertImageCommand/3362.

Both sample files in XnView or other free viewer/converter opens fine and converts fine.

I find in issue list that similar exception message exists for jpg and png files (I think
it is already fixed).

[dlemstra]

Your webp file is invalid and checks have been added that will cause this error message. For your sher3.webp file I already made a patch earlier that would make it possible to read that incorrect file. And I just pushed a patch to make it possible to also read sher3l.webp. This will be resolved in the next release.