Hi, for a user friendly GUI for the Exif tool please try BogdanH's offering:

http://u88.n24.queensu.ca/exiftool/f...ic,2750.0.html

So many of thumbnail types ignored by exiftool.
You surprise me there, do you have examples? I can understand that there would be older, legacy types particular to a model and manufacturer of camera, but I would have expected standardisation to meet the requirements of editors and publishers?

there are several FPRX types exist in real photos, and xnView dont show all of them.
Could we have some examples please?.................you will have realised by now that it has been quite some time since I last looked at this subject?

Cheers