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osxphotos
Python app to work with pictures and associated metadata from Apple Photos on macOS. Also includes a package to provide programmatic access to the Photos library, pictures, and metadata.
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You could try opening the library with PowerPhotos, a commercial app that can manage multiple Photos libraries, to see if it can read it. You could also try my free open source command line tool, osxphotos. Install it then run this command in the Terminal: osxphotos info --library /path/to/the/library This should print out a list of information about the library: number of photos, number of albums, keywords in the library, etc. If that works, then osxphotos can read the library and can likely export the photos for you so you could re-import into a new library.