trommegutten 7e6cd48783
docs: improve and clarify XMP sidecar behavior (#20334)
* docs: improve and clarify XMP sidecar behavior

- Simplified and reorganized the documentation for XMP sidecars
- Clearly separated CLI import vs. external library behavior
- Clarified what metadata fields are stored in the database
- Documented filename rules and storage behavior
- Explained write-back behavior, including permission requirements

* Clarify sidecar write-back behavior for external libraries

Updated documentation to reflect that Immich does not write metadata to sidecar files in external libraries unless the mount is writable.

Mentions silent fail behavior as described in Issue #10538.

* Update xmp-sidecars.md

* Refactor section 1: clarify XMP fields Immich reads and writes

- Rewrote section 1 with a simplified 3-column table: Metadata · Writes to · Reads from
- Corrected date field logic with prioritized read order
- Clarified that Immich only updates fields that have changed
- Removed incorrect mention of dc:title

* docs: clarify tag reading priority (TagsList, HierarchicalSubject, IPTC:Keywords)

Updated the documentation for tag metadata extraction to clarify the prioritized order in which Immich reads tags from imported media:

1. digiKam:TagsList
2. lr:HierarchicalSubject
3. IPTC:Keywords

This reflects the actual logic used in the getTagList()
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License: AGPLv3 Discord

High performance self-hosted photo and video management solution



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Disclaimer

  • ⚠️ The project is under very active development.
  • ⚠️ Expect bugs and breaking changes.
  • ⚠️ Do not use the app as the only way to store your photos and videos.
  • ⚠️ Always follow 3-2-1 backup plan for your precious photos and videos!

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Upload and view videos and photos Yes Yes
Auto backup when the app is opened Yes N/A
Prevent duplication of assets Yes Yes
Selective album(s) for backup Yes N/A
Download photos and videos to local device Yes Yes
Multi-user support Yes Yes
Album and Shared albums Yes Yes
Scrubbable/draggable scrollbar Yes Yes
Support raw formats Yes Yes
Metadata view (EXIF, map) Yes Yes
Search by metadata, objects, faces, and CLIP Yes Yes
Administrative functions (user management) No Yes
Background backup Yes N/A
Virtual scroll Yes Yes
OAuth support Yes Yes
API Keys N/A Yes
LivePhoto/MotionPhoto backup and playback Yes Yes
Support 360 degree image display No Yes
User-defined storage structure Yes Yes
Public Sharing Yes Yes
Archive and Favorites Yes Yes
Global Map Yes Yes
Partner Sharing Yes Yes
Facial recognition and clustering Yes Yes
Memories (x years ago) Yes Yes
Offline support Yes No
Read-only gallery Yes Yes
Stacked Photos Yes Yes
Tags No Yes
Folder View Yes Yes

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