![]() It should support edtf and gedcom format. (at least in my use case).įrom there I need to develop a workflow that allows me to tag the photos with the estimated datetime and then converts that to a sortable datetime in the standard field. This could work seeing as the time of scans is typically not known. Something like: if seconds = 22 then year is estimated. Come up with a code using the hours, minutes and seconds part of the date to indicate the status of the date field. "DateStatus: 1950S2" In the edtf from the python library above.Ģ) Description or Notes field: Use a standard text string in one of these two fields similar to keywords solution above.ģ) Use the time aspect of the datetime fields to indicate the status. There are 3 main options I am looking at:ġ) Keywords: log the status of the date in a standard keyword format. There are thousands of esoteric potential metadata fields that exiftool can read and write to, but also for compatibility sake, I'd like to stick to standard fields that most tools can at least read. That leaves the only option of using other fields to indicate the status of the date. My goal is a format to reliably log the metadata in the photo in such a way that it is clear when dates are accurate or guesses.įrom what I can tell, the ideal path (aside from everyone agreeing to a standard in metadata) is to not use partial dates in the standard date fields because of compatibility issues. I am in the process of scanning and archiving about 20k old family photos from the 1850s to today. GEDCOM, the standard genealogy format, supports its own version of partial dates įlickr has it's own version of partial dates that can only be updated online/API and not pulled through metadata: There is a python library that supports the extended datetime format, (not for metadata tagging though): I'd love to get my hands on some assets that LOC tagged with this spec to see how they log it. While the spec looks good, I haven't seen any solution of saving this as metadata. It isn't guaranteed that other tools will know what to do with partial dates either way.ĭublin Core/ISO 8601/Library of Congress has a comprehensive spec for partial dates: That shows up in Windows as the 'Date Taken' property for me (Win 8.1). It looks like the tag you want to use is PNG:CreationTime. Most software doesn't as the EXIF standard in PNG files is only a few years old. For example, you can have just the year and month and no day, but you can't have month and no year. ExifTool can create an EXIF:DateTimeOriginal tag in a PNG for you, but Windows doesn't support reading EXIF data in PNGs. Or which ones are just missing.Įxiftool supports missing date elements, but only if you have the higher order elements. The reason I ask this is because one of the ways I have seen to convert a HEIC image to JPG is to use Preview on a Mac, here the picture quality can be increased to make the HEIC file jump from 2.I want to be able to indicate what aspects of a date are real and which ones are estimated or calculated. ![]() I also want to ask, as I know very little about HEIC files, if peeps think it's okay to just keep the HEIC files as is and not worry about converting them? I know the HEIC files are more compressed than JPG's, does that mean they have a reduced picture quality to a JPG and if they don't, will I be reducing quality by making them into JPG's? I see that Content Creator (in my screen snap) has changed to Photoshop from the version of IOS on my iPhone so does anyone know what other data might get lost in the conversion process please? ![]() On a test run I see that the original HEIC photo's EXIF data (left hand side on my screen snap) states the Created, Modified and Content Created info as the date and time when the photo was taken but in converting it to JPG (right hand side of my screen snap) the Created and Modified data gets changed to today's (or the day I'm converting it) date and time, it's not the end of the world but I just want to check that once converted the EXIF data on the JPG will definitely keep the date and time the original photo was actually taken, and as much of the original EXIF data as possible? I am planning on converting all the HEIC photos from my iPhoneXS to JPG's using the batch conversion (Scripts > Image Processor) in Photoshop.
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