https://bugs.kde.org/show_bug.cgi?id=491608
Bug ID: 491608
Summary: To be able to set a local time to videos QuickTime
Classification: Applications
Product: digikam
Version: 8.5.0
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: wishlist
Priority: NOR
Component: Metadata-Date
Assignee: digikam-bugs-n...@kde.org
Reporter: mcfaro...@gmail.com
Target Milestone: ---
(this request is related to the comment 21 of the bug 484719)
1. Request
In the Adjust Time & Date tool, allow the user to specify optionally a time
zone (tz).
If set, Digikam will create the tag QuickTime:CreationDate with the value of
QuickTime:CreateDate and tz as time zone for each items of the selection.
If exist, QuickTime:CreationDate-tz will override QuickTime:CreateDate for
renaming based on a exif date pattern and for sorting by date.
NB. It is not possible (at least with exiftool) to add a time zone to
Quicktime:CreateDate, Quicktime:ModifyDate, and any date/time tag that is
listed as an "integer" on the Quicktime tags page
(https://exiftool.org/TagNames/QuickTime.html). On the other side, it seems
QuickTime:CreationDate is used in the Apple world to store the local date of a
video. Please see also https://exiftool.org/forum/index.php?topic=16289.0.
2. Why
The actual behavior works when the video is taken in the same time zone that
the PC running Digikam. Since it is the most usual use case, it is a nice
"shortcut" (with a difficulty though : the need to identify if a video is UTC
or local time according to the device type).
But this shortcut is wrong for another use case, the one where the video was
taken in another time zone that the pc running Digikam (typically during a
travel to a foreign country). In this case, the photos and the videos are not
sorted in chronological order (neither by date nor by name if renaming is based
on an exif date pattern).
3. Miscellaneous
The current behavior would not be broken : Digikam would continue to apply the
time zone of the PC at import. it would be up to the user to select later the
UTC videos to which he wants to create a local date by applying a time zone.
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