> Message du 07/04/18 14:40 > De : "Anton Aylward" > A : darktable-user@lists.darktable.org > Copie à : > Objet : Re: [darktable-user] DT & Exif data (ex : Vacations) > > On 07/04/18 07:24 AM, Jean-Luc CECCOLI wrote: > > > Message du 07/04/18 04:37 > > > De : "Anton Aylward"
> > > > > > You might use 'exif -l' to find *all* the tags that involve data and time > > > for > > > the various file formats. > > Well did you? > > > > If I were you I'd leave the "Original" time alone and alter the simple > > "Date and Time" > > > > > Could you please explain the reason why I should do that ? And how it would > > help DT display the corrected time ? > > Perhaps it is that I'm a native English speaker and that the difference > between > the SEMANTICS of the two tags is obvious to me me. > > "Original" means just that. It is the reference of the date and time the > original data was generated, regardless of how the 'Date and Time" > (non-original) gets altered. This is also different from the times and date > the > file was created and the time and date the file was altered. If you use GPS > then there may also be a record of the date and time the GPS recording was > made. > if you were in burst mode, then the date/time the image was digitized and the > date/time it was 'recorded' might differ. If you are working in RAW mode then > the RAW file may also have viewfinder/panel JPG (?live view?) and thumbnail > embedded, and their times, different from the time the imnge itself was > digitized, may also be recoded. > (I won't get into the audio date and time stamps.) > Which is why I asked you to look at all the other tags. > > Exif is nothing if not comprehensive! > > Since I take the advice that Patrick echoes and don't alter[1] the values in > the > RAW file I don't encounter your problem so never worry about how DT handles > this, but if it bothers you then of course why don't you look at the source > code? I wonder why you feel offended by my first question - attempted you really read and understood it -. I am long from being able to undedrstand DT's code. I just meant to ask : where does DT read the data it displays. Then, you start speaking of semantics and think I'm someone very stupid - well, I admit I sometimes can be inattentive and miss some details -. > > You might also google for EXIF SEMANTICS > This still doesn't answear the question : why would you want me to do the opposite of what I want ? Why should I ignore the only tag that DT actually takes into account ? As this is the one DT reads to display the information, why would I have to let it wrong when I could modify it and have DT display the correct value ? I know it is possible to specify an offset value from within DT, but this will be lost as soon as the database is reset and/or the sidecar is erased. How will I remember, say, 6 months later, that some peculiar photos were shot with wrong date / time value ? ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
