I would like to have help please with ExifTool, for the following operations:
I have thousands of pictures scattered across dozens of sub-folders. All sub-folders are nested under a single parent folder, though. How do I tell ExifTool to apply the changes on all files?
What I would like to do specifically is to "cut" each value under the "Copyright" EXIF tag, and "paste" it to the "UserComment" EXIF tag. I would like to this for all photos at once, and each photo has to keep its respective value (only now under a different tag), of course. Again, not all photos have a value in the "Copyright" field, I assume those will be ignored by the software.
Finally, I would ExifTool to erase every possible metadata but the newly created values under the "Comments" tag.
Help and guidelines will be greatly appreciated.