This and the other solutions in this thread wont work with plex or the media servers. The way it works with the media servers is that there’s a variable number of outputs, and you just cant emulate that on the client side without a virtual filesystem or by some creative hacks that use multiple file descriptors (even then how do you handle dynamic?).

As for why the variable number of outputs exist in the first place, it’s because when you’re a media server, you dont want to wait until the full file is converted before serving it to the user. You want to start playing immediately so the output is chunked into multiple files