Is there a FOSS alternative to PluralEyes?

@snibgo, yes you, but it’s entirely my fault.

Actually I have background in sound design and production (been a dj/producer for 10 years) and I’m also familiar with image/video processing techniques, however I am at a loss when it comes to the inner workings of these software, and coding/engineering jargon.

That said, I do appreciate your trying to help and I wanna reiterate that you need not apologize, it is I who is lacking.