digikam-doc/post_processing/time_adjust.rst

0001 .. meta::
0002    :description: The digiKam Time Adjust
0003    :keywords: digiKam, documentation, user manual, photo management, open source, free, learn, easy, date, time, adjust
0004
0005 .. metadata-placeholder
0006
0007    :authors: - digiKam Team
0008
0009    :license: see Credits and License page for details (https://docs.digikam.org/en/credits_license.html)
0010
0011 .. _time_adjust:
0012
0013 Time Adjust
0014 ===========
0015
0016 .. contents::
0017
0018 The Time Adjust tool available from :menuselection:`Item --> Adjust Time & Date` :kbd:`Ctrl+Shift+D` allows to tune or records the timestamps in file metadata. This common task is sometime mandatory when your images do not contain dates in metadata as when contents is digitized with a scanner, or when a camera records a wrong date in you file due to a bad device settings. With this tool you can choose the right source to take the date information, the date entries to fix or append, and the calculation to operate on dates before registration.
0019
0020 The **Timestamp Used** group allows to select the source of the date. Available choices are listed below:
0021
0022     - **digiKam timestamp**: the date records in database.
0023     - **File name timestamp**: the date extracted from the filename.
0024     - From the file system: **File last Modified** will use the last modification date of file.
0025     - From the metadata:
0026         - **Exif/IPTC/XMP**: parse Exif, IPTC, and XMP to get the first value available.
0027         - **EXIF: created**: image creation timestamp from Exif.
0028         - **EXIF: original**: image original timestamp from Exif.
0029         - **EXIF: digitized**: image digitized timestamp from Exif.
0030         - **IPTC: created**: image created timestamp from IPTC.
0031         - **XMP: created**: image created timestamp from XMP.
0032         - **EXIF: created (fuzzy)**: image creation timestamp from Exif and trying different encoding combinations in case of non-respect of standard.
0033         - **EXIF: original (fuzzy)**: image original timestamp from Exif and trying different encoding combinations in case of non-respect of standard.
0034         - **EXIF: digitized (fuzzy)**: image digitized timestamp from Exif and trying different encoding combinations in case of non-respect of standard.
0035     - A fixed date taken from calendar.
0036
0037 The **Timestamp Adjustments** group allows to select operation to process of source date to evaluate the target date. Available choices are listed below:
0038
0039     - **Copy value**: copy timestamp as well from source date to target date.
0040     - **Add**: add a fixed timestamp to source date to compute target date. Use the settings on the right side to define the added value.
0041     - **Subtract**: remove a fixed timestamp to source date to compute target date. Use the settings on the right side to define the subtracted value.
0042     - **Interval**: interval timestamp to the next image from the list to process. Use the settings on the right side to define the interval value.
0043
0044 The **Determine difference from clock photo** allows to select a photo to get a date from and calculate the time difference between it and the current item selected from the list of files to process. You can also use drag and drop over this button to define the selected image. This feature will automatically select the **Copy value**, **Add**, or **Subtract** method.
0045
0046 The **Timestamp updated** group allows to define the target entries to patch with the new values. Available choices are listed below:
0047
0048     - **Update only existing timestamps**: will change only the values which already exists in file.
0049     - **Exif: original**: will change the image original timestamp from Exif.
0050     - **Exif: digitized**: will change the image digitized timestamp from Exif.
0051     - **Exif: created**: will change the image creation timestamp from Exif.
0052     - **Exif: Thumbnail**: will change the image thumbnail timestamp from Exif.
0053     - **XMP**: will change the image timestamp from standard XMP namespaces.
0054     - **XMP: video**: will change the image timestamp from WMP video namespace.
0055     - **IPTC: created**: will change the image created timestamp from IPTC.
0056     - **File last modified**: will change the last modified timestamp from file system.
0057
0058 .. figure:: images/time_adjust.webp
0059     :alt:
0060     :align: center
0061
0062     The digiKam Time Adjust Tool Tuning Items Time-Stamp