Emlid Studio needs to have time marks in raw data logs from the rover to geotag the photos.
Time marks show the exact time of taking the photo. After post-processing, calculated coordinates for time marks are stored in the _events.pos file. So the number of events there should be the same as the number of photos in the attached folder.
I am so happy to get back to this thread with some good news
Now Emlid Studio supports MRK files for geotagging! We’ve just released the stable version of the app with this feature. So I invite you all to test it. And, of course, can’t wait to hear your feedback!