Anyone aware of some Python module or library capable of modifying EXIF and IPTC data in Adobe RAW files (.dng)? Until some eight years ago, I used JPEG and could rather easily do such modifications helped by Python. After having switched to RAW, I have to use image tools to modify EXIF info.
Primarily the EXIF Taken date is of interest to be modified, but some IPTC-fields are also candidates of modification.
(I'm geotagging photos from my cameras each of which have RTC's that creeps in various directions and amounts. My 'worst' camera 'hurries' ~2.4 sec per day. Before matching photodates with .gpx-data from a GPS-logger, I need to modify the Taken date with various amounts depending on number of days since cameraclocksetting.)
