There are many, they just all tend to suck. Either they miss images that are the same but not really (Eg two different jpg save of an original), or they catch

There are many, they just all tend to suck. Either they miss images that are the same but not really (Eg two different jpg save of an original), or they catch false positive. Then you find something that works great, but it ends up requiring manual usage to be reliable, which makes my 20+ years of photos archive unusable. Then you try to find the same for movies and video file, and it's even worse.