More > JRiver Media Center 31 for Windows
Revisiting Images/Photos
darichman:
--- Quote from: Matt on June 07, 2023, 01:12:40 pm ---I'm looking at this a little bit.
We already set the date to the EXIF and IPTC tags. Keywords are stored in the IPTC tag. Caption is saved in the XMP and IPTC tags.
--- End quote ---
Thanks Matt for looking at this. Even this helps clarify how things are stored currently and probably explains some of the quirks in interoperability. Thanks (old friend) Daydream for the insights into the technical aspects of the standards - I'm not familiar with the tech parts, and am in the group that 'just wants things to work'. Of course this relies on the technical underpinnings though :)
The standard location fields are a great addition - I had custom [State] and [Country] MC fields so look forward to migrating these.
--- Quote from: Matt on June 07, 2023, 01:12:40 pm ---If there are additional specific tags you would like to see mapped, please provide details.
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Matt - if [Date] is written to EXIF, do you have any insight into which [Date] field it is mapped to? See my comments in opening posts about how this is inconsistently read across programs - Google photos, lightroom.
Lightroom does not seem to pull [Caption] or [Keywords] from the MC tag (see my examples above)
Thank you thank you for looking at this!
Matt:
--- Quote from: darichman on June 09, 2023, 04:47:57 am ---Matt - if [Date] is written to EXIF, do you have any insight into which [Date] field it is mapped to? See my comments in opening posts about how this is inconsistently read across programs - Google photos, lightroom.
--- End quote ---
It's the primary "Date" field in Media Center. We set the date in XMP, IPTC, and EXIF.
--- Quote ---Lightroom does not seem to pull [Caption] or [Keywords] from the MC tag (see my examples above)
--- End quote ---
"Caption" and "Keywords" are written to XMP and IPTC. Also to the MJMD tag, but that doesn't help outside JRiver.
JimH:
darichman,
Thanks for helping. We won't quit until this is right.
marko:
--- Quote from: Matt on June 07, 2023, 01:12:40 pm ---I'm looking at this a little bit.
We already set the date to the EXIF and IPTC tags. Keywords are stored in the IPTC tag. Caption is saved in the XMP and IPTC tags.
--- End quote ---
I had quite a long post almost ready to send, then found something a lot more important....
Take an image that has no existing EXIF tag block, import it into MC and set the date.
MC does not write the date to EXIF "Date/Time Original"
Use a third party app to set the EXIF "Date/Time Original". Choose a different date/time than that set in MC. MC will immediately detect the new date and update accordingly, now, change the date in MC again, and now, MC correctly writes the date to EXIF "Date/Time Original"
So, if the EXIF date does not exist when the date is changed in MC (typical of most 'old photo' scanned images) MC should create it. It does not. That's a big deal as the EXIF "Date/Time Original" is what just about everything out there looks for when parsing an image for a date.
-marko
darichman:
--- Quote from: marko on June 10, 2023, 12:10:08 am ---MC does not write the date to EXIF "Date/Time Original"
--- End quote ---
That could be it then! Might also make sense, as per my earlier post ('Dates and Scanned Images') MC seems to pull [Date] on import from the [Date modified] field (indicated by windows file properties).
For my personal use, none of the other date fields actually matter for me (date created vs date modified vs. date/time original etc) - I understand there might be use cases where they do. The simplest option (for me) would be that setting [Date] in MC sets [Date taken], [Date created], [Date/time original] in all the relevant tags. This could also be run from 'update tags from library' (and if no existing EXIF tag then one should be created?) This would maximise compatibility/consistency but is a bit of a blunt instrument for those who might want to preserve the other tags.
I would love to see a table that mapped out various date fields and mappings across the main programs. Eg Windows file properties lists [Date taken], [Date created], [Date modified] vs EXIF / IPTC / XMP vs Lightoom vs Google photos.
--- Quote from: JimH on June 09, 2023, 07:29:07 am ---darichman,
Thanks for helping. We won't quit until this is right.
--- End quote ---
Jim I am super appreciative!! I know it's a complicated mess and might not be up there with more exciting priorities. So I do appreciate the time and effort :)
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