Ask a question...
Hello @jcupitt
Maybe you know a hint how to solve this thumbnailing issue:

I try these settings:
vipsthumbnail --rotate --eprofile=srgb --iprofile=srgb

on the attached image...

and it is not working with following warning:
profile incompatible with image

The picture is a grayscale image... Do you know how we can avoid errors like this? Do I have to check first if it is grayscale and then use vipsthumbnail without profile arguments?

Thank you again for any hints and help
cheers dave

Platform information
OS: [Ubuntu 18.04 LTS]
Vips: [8.10.1]