All the solutions I’m seeing are some third party service where I would have to upload my videos to them to get them transcribed.
All the solutions I’m seeing are some third party service where I would have to upload my videos to them to get them transcribed.
Maybe you don't even need that, at least for accessibility.
Windows for example now has exactly this feature, which is a speech-to-text-transformer powered by some "AI".
But, in contrast to the Bing chat, this works (afaik) offline by some FOSS-backend, which I don't know the name of anymore (maybe someone else will?) You could use that tool for live transcription. That is supposed to work extremely well!
Please correct my if I'm wrong, I don't use Windows anymore personally, and at work we have a business edition that doesn't ship this brand new feature yet.
(Side note: as strongly as I hate Windows, this feature is absolutely godsend for hearing-impaired people and should be adopted by every other OS!)
If you want to transcript movies and thereof in bulk by uploading them, I can't give you any information, sorry.
But I believe there are some sites that give you the "subtitle file" for download freely, which you can add manually for each movie in Plex/ Jellyfin.
Android does on-device transcription of any Audio source as well in recent versions!
The issue with providing this with open-source software is that it tends to require deep integration into the OS, which needs pretty much the same kinds of APIs that spyware also needs, so they get locked down a lot …
For example on Android I'm pretty sure that a 3rd party play store app could not provide the same feature without requiring the user to click through some unavoidable, scary sounding warnings from the OS (if at all).
AFAIK iOS and macOS have had this for some time now. I think since a couple years back it’s all local-only on newer devices as well.