Comment 12 for bug 1468585

I was looking into this with Kyle at the sprint today. He had his krillin set to UTC time zone and took a photo which produced the following metadata:

    $ exiv2 print -PE image20160122_182840970.jpg | grep Date
    Exif.Image.DateTime Ascii 20 2016:01:22 19:28:42
    Exif.Photo.DateTimeOriginal Ascii 20 2016:01:22 18:28:42
    Exif.Photo.DateTimeDigitized Ascii 20 2016:01:22 18:28:42

My arale was set to Australia/Perth time zone (UTC+8), and took a photo:

    $ exiv2 print -PE image20160123_030314442.jpg | grep Date
    Exif.Image.DateTime Ascii 20 2016:01:22 19:03:15
    Exif.Photo.DateTimeOriginal Ascii 20 2016:01:23 03:03:15
    Exif.Photo.DateTimeDigitized Ascii 20 2016:01:23 03:03:15

It looks like DateTime is being stored with a different time zone to DateTimeOriginal/DateTimeDigitized, which seems like a bug. For my arale, the 8 hour difference looks like DateTime is in UTC and the others in local time.

I'm not sure where the DateTime value from Kyle's krillin comes from: it isn't UTC and since local time is UTC, so it isn't that either.

Whatever is going on, the root cause appears to be the inconsistent dates that the camera is writing to the images it produces.