I’m trying to reduce the size of my video collection because I’m running out of storage.
My strategy is to look for smaller sized files to replace very large ones. When that fails, I am using handbrake to rencode. Its working, but very slowly due to my ancient computer. Redownloading is the much faster method.
Some titles, which were originally released as non-english, have existing small files, but the English audio is only available less commonly as a huge file.
Is it possible to redownload the non-english video and map the English audio onto it? It might be too much fooling around to get syncing correct.
Extra question, does anybody know how to set up sonarr/radarr to try to reduce filesize automatically? Ive been doing all the downloading by hand.


MakeMKV lets you mix and match files into a video container, so you can put a different audio track or sub track into the video.
You might have trouble with the sync if things don’t start at exactly the same time, but I think there are offset settings in there somewhere.
Yeah, pretty sure that can be done with SMPlayer too, at least with the animes I watch there are sometimes multiple audio tracks to choose from.