When the Image.IdentityAsync(Stream) return null value?

[ntruongvux]

When I use IdentityAsync to get image information but it always returns null.

[JimBobSquarePants]

You’ll need to provide a lot more information than that for anyone to be able to help in any way. At an absolute minimum a code sample and image.

[ntruongvux]

I use the image below to save to AzureBlob and read it to MemoryStream.
Can you provider the case can return null of the Image.IndentifyAsync(Stream stream);

[dlemstra]

You are getting null returned because that image is an unsupported format. The extension is .jpg but it actually is a .webp file that is currently not supported by this library.

[ntruongvux]

Yeah, Thank you so much
I don't know it's .webp
But how to check the real extension of the image?

[dlemstra]

You are sort of doing that now 😉. You could also use IdentifyWithFormatAsync and check the format that is being returned.

[ntruongvux]

Thanks to @dlemstra