https://bugs.kde.org/show_bug.cgi?id=491608

--- Comment #11 from mahikeulbody <mcfaro...@gmail.com> ---
Request: to be able to have a coherent sorting between local time items and UTC
time items (such as quicktime videos), whether sorting by date or sorting by
name.

The current implementation fails to achieve this request because it does not
respect an essential constraint : don't lose the information of the original
UTC time into the file ; otherwise if these video files are re-imported
someday, Digikam will add the tz of the PC again (not to mention that the user
will no longer be able to tell later if the video was already put in local time
or not).

Indeed, when the user "Adjust Time" to achieve a local time (applying an offset
= tz of the location where the video has bee taken - tz of the pc at the import
date), Digikam writes the new value to ALL date time fields of the file, thus
losing UTC time value.

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PS. The only case where the original UTC time itself could be modified in the
file is if the user is aware that is a wrong UTC time. I don't know if it is
possible though (may be a smartphone connected to a border network which has
not the same time zone that the current location of the user ?). As far as I'm
concerned, I don't need Digikam to take this case into account (if it ever
exists, it is easy to take it in account with Exiftool before to import the
relevant videos).

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