It’s always good with questions like these to answer with how you’d do something even if the logic for why might not work. Usually if the question is faulty in some way like this one, it’s indeed because the poster has the wrong idea about something and needs to be advised against it, but sometimes it’s because their reasons are opaque to us and they still need the solution. Even in the former case, the solution is often seen by many others who stumble upon threads like these and can apply it to other scenarios where it actually makes sense, like converting lossless to lossy.