For some reason Google Takeout does not archive all images from Hangouts messages, it takes some selection of only your images.
Also all other workarounds in the do not seem to work anymore
This script downloads all attachments from Hangouts history.
- Download only Hangouts history from Google Takeout
- Install Python
- Download start.py and place it in same folder with
Hangouts.json - Double click on
start.pyto start - Script will run and download all images under
filesfolder