Nothing plays on tv

[TheDreadPirate]

There are a lot of issues with ffmpeg.  It can't extract subtitles, can't transcode, can't remux.  If I had to guess, Jellyfin/ffmpeg doesn't have write access to the app directory (C:\ProgramData\Jellyfin).

Why is it trying to do that? I just want to play movies. Is there a way to disable it from trying to extract subtitles and transcode and remux? Why can't it just play the file?
How do I give it write access?

The failure to extract subs and is a symptom of a larger problem.  The directory that ffmpeg is trying to extract subtitles to is in the same directory tree as the transcode path where transcode and remuxes are written.  If your client can't play the file unmodified, Jellyfin will try to remux or transcode and it looks like it is failing due to a probable permissions issue.