> From: Eric Gregory [[email protected]] > Sent: 2011-05-20 21:03:15 MEST > To: Eivind LM [[email protected]] > Cc: [email protected] > Subject: Re: [Shotwell] One event, several cameras. > > On Fri, May 20, 2011 at 4:47 AM, Eivind LM <[email protected]> wrote: > > > This GUI is definately useful (it does the date/time update of the photos, > > as I used jhead for before), but does not help me to find the right time > > offset (and that is the hardest part). I would like an interactive update > > of > > the images in the background as I change the time field, so that I can > > "step" the time offset until I see that the pictures are correctly ordered. > > Anyone else think this could be useful? > > > This seems like it might be a fairly common use case. A lot of folks don't > set the time on their camera, or they have two cameras with different times > (possibly from different zones or they just never bothered setting up the > clock.) > > I could see a couple different ways this could work. > 1. Per-camera time adjustment. We read the metadata out of each photo and > remember the camera name. The user can then set a time offset for this > camera and apply it to their library.
This would work under the assumption that the camera clock is never set manually, and that it does not drift. Some cameras might reset the clock if the battery is replaced. But remembering the time offset from one camera, and suggesting this offset to the user on next import from the same camera might be a good idea, giving the chance to the user to verify the offset and optionally readjust as neccesary. > 2. Per-import time adjustment. The user could examine an import roll and > set a time offset for all photos in that roll. (This feature would be more > useful once we support import roll history.) This makes most sense to me. But what then in the case where i travel to a new time zone, take a couple of pictures, and then adjust the camera clock? There will then be just a part of the import roll that needs time adjustment. I think there somehow needs to be a possibility for manual selection. > Do either of these make sense to you? Or is there something different you'd > like to see? In my opinion there are two separate things to consider here. One is to get the selection of photos to adjust (several options are useful: per camera, per import roll, per directory, per selection), and the other is to find the time adjustment parameter. Perhaps it could be done it this way: 1. I identify one photo in the library which is sorted incorrectly. 2. I somehow specify the correct time for this photo 3. Shotwell asks me if i want to 3a. Adjust only this photo 3b. Adjust all photos taken by the same camera by the same amount 3c. Adjust all photos in the same directory as this photo by the same amount 3d. Adjust all photos on the same import roll by the same amount In Cases 3c-d, it would be very useful to see the other photos that would be adjusted, highlighted among the other photos in the library (and in the new position after adjustment). This would help me to find the correct time adjustment parameter. It would also be useful to select a subset of the highlighted photos (to exclude photos from a camera/directory/import roll that already has the correct time). Thanks for considering my ideas! Best regards, Eivind
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