I think this would make a good -arr application.

Ingest podcast feeds, crowdsource hashes of whole and partial sections of the downloaded audio, which should be a good start to auto-tag dynamically inserted ads.

For non-dynamic ads, provide an interface to manually identify their start/end, and publish for others. The same interface could be used to add chapters and other metadata.

Then you’d just point your podcast app to an RSS feed you self host.

I propose Listenarr, unless this has already been taken.