Extract photos from unencrypted iTunes backup of iPhone
Simply open terminal/cmd in the backup folder (the one you can find Manifest.db)
On windows, the folder is like %AppData%\Apple Computer\MobileSync\Backup<random-uuid>-\
Remember : the backup MUST NOT BE ENCRYPTED
To make backup, open iTunes
Connect your iphone via usb
Click on the small Phone icon on the top left corner
In Saves, click save now.
Once finished, in the terminal run python iphone-to-pc-photo-extractor.py
or python3 if on macOS.
Find your photos in the newly created "Media" folder !
Good luck !