Nothing plays on tv

[Massacher]

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?

[thunderb0lt]

To grant write access, right-click C:\ProgramData\Jellyfin, go to Properties → Security, and give Full Control to the Jellyfin service user.

[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.

[Massacher]

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).

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.

So it can't extract subtitles, can't transcode or remux. So why even have that feature then? How to disable it completely? I want to just play the file as is without converting, transcoding or anything else. How do I achieve that?

[TheDreadPirate]

Transcoding/remuxing doesn't happen for the lulz. It happens because the client needs the conversion.

You can try doing what Thunderbolt suggested or you can try running the Jellyfin tray app as admin. Either should grant Jellyfin and ffmpeg sufficient permissions.

[Massacher]

I have given all the folders full permission (Movies and TV shows). Given ffmpeg and frobe full permission. I've even given the transcode folder full permission.

But I have discovered that I can't even play them on the server. I click into a movie and press play and then this error:

   

Something is seriously wrong. I tried trickplay too. I enabled hardware decoding on the server and enabled trickplay on the app on my tv. No difference. Still won't play but I can see it play in the dashboard. 
I do use external players like VLC, Nova player and a few others. But I disabled those temporarily to see if the Jellyfin internal player would work. Nope. Still the same issue. Black screen with a spinning circle sometimes.

I don't know what else to do. I've tried everything I can think of and the suggestions on here. I'm still at square one. Nothing plays.

Here are the logs from today. One direct stream and one transcode.
Also a log from just starting the server without opening the browser. And then one more with the browser open (in the zip).

[TheDreadPirate]

And you've also tried running the tray app as admin? It still looks like there are a bunch of permission issues.

And to clarify thunderbolt's suggestion, you should be granting YOUR user full access to Jellyfin's programdata folder.