[digiKam-users] Is changing the date of a photo a destructive process?

Stefan Mueller stefan.mueller.83 at gmail.com
Wed Mar 7 15:27:24 GMT 2018

would be nice if exiftool could be executed within digikam for such cases

2018-03-07 16:14 GMT+01:00 Andrey Goreev <aegoreev at gmail.com>:

> I might be wrong but I think BQM always produces a new file and the
> operation is not lossless.
> You might want to use exiftool / exiv2 to shift date/time of multiple
> pictures.
> Here is an example from exiftool website:
> Common metadata date/time tags are incremented by -6 hours, while
> FileModifyDate is not changed:
> exiftool -alldates-=6 -P FILE(FOLDER)
> Sent from my Samsung Galaxy smartphone.
> -------- Original message --------
> From: woenx <marcpalaus at hotmail.com>
> Date: 2018-03-07 7:30 AM (GMT-07:00)
> To: digikam-users at kde.org
> Subject: [digiKam-users] Is changing the date of a photo a destructive
> process?
> So I want to correct the date to a bunch of pictures. If use the metadata
> editor on the tools panel, I can just change it one by one. If I want to
> process several at a time, I use the Batch Queue Manager.
> By default, the Batch Queue Manager does not overwrite pictures, you have
> to
> actively check that option, and there's also a whole "Saving images" tab
> dealing with JPG quality and that kind of stuff.
> My question is: If I am just changing the date of a group of JPG pictures,
> do they lose quality every time a change is made, or the batch queue
> manager
> just changes the metadata and leaves the picture intact?
> --
> Sent from: http://digikam.1695700.n4.nabble.com/digikam-users-
> f1735189.html
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