Is it possible to diff PowerPoint version-controlled with git?

Question

I have some PowerPoint documents that I keep version-controlled with git. I want to know what differences are between versions of a file. Text is most important, images and form

Answer 1

I was unable to install python-pptx, as suggested by the accepted answer, so I looked for a node.js solution (that may also work for several other file formats that it can handle).

Install https://github.com/dbashford/textract (npm install --global textract).

Define how to diff "textract" in your .git config. For my Windows machine,

[diff "textract"]
    binary = true
    textconv=textract.cmd

Define in your .gitattributes that *.pptx file should use diff "textract"

*.pptx diff=textract

git diff happily.