forked/osxphotos
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Updated Understanding the Photos database (markdown)

Rhet Turnbull
2020-05-09 18:11:55 -05:00
parent ce7b16a255
commit 48612b57d4
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Understanding-the-Photos-database.md

@@ -33,6 +33,12 @@ The version is a 4-digit integer, the first digit of which signifies which versi
Most of what is described in the following comes from reverse engineering what Photos is doing or looking at the code of [others](https://github.com/RhetTbull/osxphotos/wiki/Related-projects) who have done related work. I had to make many, many assumptions and some of them are surely wrong. If you discover any errors or have additional information to add I welcome edits to the wiki or opening an [issue](https://github.com/RhetTbull/osxphotos/issues)!
## dates/times in the database
Dates & times in the database are stored as a MacOS time value which is the number of seconds since 2001-01-01 00:00:00. To work with these in python, you'll need add the number of seconds since the Unix time epoch of 1970-01-01 00:00:00. I do this by computing a time delta thusly:
```python
td = (datetime(2001, 1, 1, 0, 0) - datetime(1970, 1, 1, 0, 0)).total_seconds()```
Additional details about the Photos 5 database structure are [here](https://github.com/RhetTbull/osxphotos/wiki/Photos-version-5-database).
Additional details about the Photos 4 database structure are [here](https://github.com/RhetTbull/osxphotos/wiki/Photos-version-4-database).