Hey Mike,
These bits of info change many things but not everything!
Nevertheless, your software is applying calculations on info that is in your file.
A jpg file is by far not as good as a RAW file as it is compressed and, in the
process of reduction, a lot of info is simply discarded, deleted!
If the remaining info is sufficient… I got no idea since I never do anything but
RAW recordings…
Sorry I can not help you, really sorry.