Unable to read WEBP images using ImageFlow.Net

[thecaptncode]

I have installed ImageFlow.Net and the correct runtimes into my asp.net webforms project. ImageFlow reads JPG and other image formats just fine using the following code:

ImageInfo info = ImageJob.GetImageInfo(new StreamSource(msDoc, false)).Result;
int width = (int)info.ImageWidth;
int height = (int)info.ImageHeight;
string ext = info.PreferredExtension;

However, when I use GetImageInfo on a WEBP image I receive the following exception:

Imageflow.Bindings.ImageflowException: ImageMalformed: NoEnabledDecoderFound: No ENABLED decoder found for file starting in [49, 49, BC, 1, 20, 0, 0, 0, 24, C3, DD, 6F] at
imageflow_core\src\codecs\mod.rs:153:20
https://github.com/imazen/imageflow/blob/1a7e1eecd8f04cab4413b48c2bf8bd5bbf140f5d/imageflow_core\src\codecs\mod.rs#L153
imageflow_core\src\context.rs:133:103
https://github.com/imazen/imageflow/blob/1a7e1eecd8f04cab4413b48c2bf8bd5bbf140f5d/imageflow_core\src\context.rs#L133
imageflow_core\src\context.rs:174:66
https://github.com/imazen/imageflow/blob/1a7e1eecd8f04cab4413b48c2bf8bd5bbf140f5d/imageflow_core\src\context.rs#L174
imageflow_abi\src\lib.rs:707:62
https://github.com/imazen/imageflow/blob/1a7e1eecd8f04cab4413b48c2bf8bd5bbf140f5d/imageflow_abi\src\lib.rs#L707

Is there something I didn't install or need to reference? An example image that throws the above exceptions with the above code is here: https://media.wuerth.com/source/eshop/stmedia/wuerth/images/std.lang.all/resolutions/category/576px/105488.jpg

[imazen-bot]

According to the error message the file does not start with a valid image header.

The code that checks these can be found here: https://github.com/imazen/imageflow/blob/696fea2036d3439dd6969570caef9b87cbc76db9/imageflow_core/src/codecs/mod.rs#L77-L88

[lilith]

Do you have an example image in webp format that causes this error? Are you sure that nothing else is seeking the stream before it is read?

[thecaptncode]

There is a link at the bottom of the issue to an image that produces exactly that error. Examining the image in Firefox reveals that it is a WEBP image.

I am certain the stream is at the beginning. I can pick through the stream to see if it looks as expected. Perhaps there is an issue there. I have examined the WEBP file before in a hex editor and I saw the RIFF and WEBP in it where expected but I did not check the stream to see if that was it.

[lilith]

The error message gives you the first bytes of the stream, in this case [49, 49, BC, 1, 20, 0, 0, 0, 24, C3, DD, 6F]. That does not look like a RIFF/WEBP header. Can you share all of the code you are using to load the stream? I would suggest debugging and inspecting the stream bytes.

[thecaptncode]

That was a very good catch. I debugged the stream and found an encoding issue that was only manifesting when I was testing WEBP. I am sorry to bother you. Sometimes the ones that stump you are due to making an assumption. Thank you for pointing that out.