Exiftool's output from Nikon DSLR & Z-series JPEGs omits the Compression Type. Apparently from the source (Nikon.pm, v 4.24 lines 6852-6863), this is only supported for the D500. This information has been in all Nikon JPEGs at least since the time of the D200. How fixable is this? Looks like I need to put up some test files/images...
Hmm, how can I get Exiftool to generate a formatted dump of a JPEG so I can examine its various data elements? Thanks
Use -U to display all unknown information, then try changing the compression type only and see what changes in this output. You may probably need a number of pictures with each setting to get find something that changes reliably.
I got the pictures you sent, but I haven't had the time to look at them yet.
- Phil
Good news: Warren Hatch has just sent me an update that should decode this for all recent cameras. Look for this to be included in version 12.66
- Phil
You sent test images from the Z9, D850 and D3S. ExifTool 12.68 will be able to decode JPEGCompression and Quality from each of these.
- Phil