Am Montag, den 30.08.2010, 23:35 +0200 schrieb massimo citterio: > 0 sync 2 or more camera time (usually my two cameras and my gps-cell > phone have different time) This is actually a much more difficult topic than one might think at first. Syncing cameras to each others is of no use. Syncing the pictures of cameras to UTC is the key, since GPS data always has accurate UTC-timestamps by design. But how to determine the time-difference between your camera and UTC? The computer running f-spot can be set to UTC accurately enough by ntp. Then we can encode the UTC time graphically by a 2D barcode and take a picture of it. This picture then carries the UTC time it was taken at as 2D barcode and the camera time it was taken at as EXIF tag. It can be detected easily and the time difference of camera and UTC (which is equal to GPS time) can be read automatically from the picture and applied to all pictures of the same import. Maybe even saved to adjust later imports by the same camera (detected by the EXIF headers). This is just a preparatory step for syncing GPS data and pictures, for which accurate EXIF times are crucial. Actually I have the idea sitting in my desk drawer since a while and programmed a prototype last year, but never got around to finish or publish it. By now the plugin is way out of sync to the current codebase and I'd recommend a new implementation. I hope you guys like the idea because I really would love to see this unique feature implemented in f-spot. Cheers Jan
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