How to handle faulty jpgs?

[oqpvc]

Hi there!
I am trying to deal with JPG files that seem to be faulty, notably for images like the one attached which fails with

(DecodingError { format: Exact(Jpeg), underlying: Some("Unknown marker 0xFF7F") }

Other image processing tools like imagemagick can handle the image just fine, and a simple convert faulty.jpg notfaulty.jpg fixes the issue, but I am wondering if there is a way I can deal with this type of image directly anyways.

For context, the images are generated by a scanner when scanning to pdf. When I use the pdf crate to iterate over the images and try to use the image crate to make them accessible, I get the error above. Digging deeper, image uses zune to decode the image and when I use zune directly to decode this image, I get the same error, so that's why I'm asking here.

Roughly speaking I'm encountering this error at around 60% of images scanned with that scanner, always with a "Unknown marker 0xFF??" error where the last byte seems random to me.

If you have any idea how I could decode those image straight within rust anyways, that would be greatly appreciated.

[oqpvc]

This is using zune-jpeg 0.4.13 btw.

[etemesi254]

JPEG markers are https://www.disktuna.com/list-of-jpeg-markers/ so 0xff7f is not there,

Let me investigate will get back to you