SOLVED: Jellyfin doesn't work

[supertanno]

No, I'm running it as my normal user, which does have root access through sudo. I'll switch to root, try again, and report back.

Update: nope.

Code:

root@tannoflix:~# jellyfin
[22:51:20] [INF] [1] Main: Jellyfin version: 10.8.10
[22:51:20] [INF] [1] Main: Environment Variables: ["[JELLYFIN_LOG_DIR, /root/.local/share/jellyfin/log]"]
[22:51:20] [INF] [1] Main: Arguments: ["/usr/lib/jellyfin/bin/jellyfin.dll"]
[22:51:20] [INF] [1] Main: Operating system: Linux
[22:51:20] [INF] [1] Main: Architecture: X64
[22:51:20] [INF] [1] Main: 64-Bit Process: True
[22:51:20] [INF] [1] Main: User Interactive: True
[22:51:20] [INF] [1] Main: Processor count: 4
[22:51:20] [INF] [1] Main: Program data path: /root/.local/share/jellyfin
[22:51:20] [INF] [1] Main: Web resources path: /usr/lib/jellyfin/bin/jellyfin-web
[22:51:20] [INF] [1] Main: Application directory: /usr/lib/jellyfin/bin/
[22:51:20] [INF] [1] Emby.Server.Implementations.AppBase.BaseConfigurationManager: Setting cache path: /root/.cache/jellyfin
[22:51:20] [INF] [1] Emby.Server.Implementations.ApplicationHost: Loading assemblies
[22:51:20] [INF] [1] Jellyfin.Networking.Manager.NetworkManager: Defined LAN addresses : [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
[22:51:20] [INF] [1] Jellyfin.Networking.Manager.NetworkManager: Defined LAN exclusions : []
[22:51:20] [INF] [1] Jellyfin.Networking.Manager.NetworkManager: Using LAN addresses: [10.0.0.0/8,172.16.0.0/12,192.168.0.0/16]
[22:51:20] [INF] [1] Jellyfin.Networking.Manager.NetworkManager: Using bind addresses: []
[22:51:20] [INF] [1] Jellyfin.Networking.Manager.NetworkManager: Using bind exclusions: []
[22:51:23] [INF] [1] Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: TMDb 10.8.10.0
[22:51:23] [INF] [1] Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: Studio Images 10.8.10.0
[22:51:23] [INF] [1] Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: OMDb 10.8.10.0
[22:51:23] [INF] [1] Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: MusicBrainz 10.8.10.0
[22:51:23] [INF] [1] Emby.Server.Implementations.Plugins.PluginManager: Loaded plugin: AudioDB 10.8.10.0
[22:51:23] [INF] [1] Main: Kestrel listening on Any IP4 Address
[22:51:24] [INF] [1] Emby.Server.Implementations.ApplicationHost: Running startup tasks
[22:51:24] [INF] [1] Emby.Server.Implementations.ScheduledTasks.TaskManager: Daily trigger for Extract Chapter Images set to fire at 2023-07-21 02:00:00.000 +00:00, which is 03:08:35.6272410 from now.
[22:51:24] [ERR] [1] MediaBrowser.MediaEncoding.Encoder.MediaEncoder: Error validating encoder
System.ComponentModel.Win32Exception (2): An error occurred trying to start process 'ffmpeg' with working directory '/root'. No such file or directory
   at System.Diagnostics.Process.ForkAndExecProcess(ProcessStartInfo startInfo, String resolvedFilename, String[] argv, String[] envp, String cwd, Boolean setCredentials, UInt32 userId, UInt32 groupId, UInt32[] groups, Int32& stdinFd, Int32& stdoutFd, Int32& stderrFd, Boolean usesTerminal, Boolean throwOnNoExec)
   at System.Diagnostics.Process.StartCore(ProcessStartInfo startInfo)
   at System.Diagnostics.Process.Start()
   at MediaBrowser.MediaEncoding.Encoder.EncoderValidator.GetProcessOutput(String path, String arguments, Boolean readStdErr, String testKey)
   at MediaBrowser.MediaEncoding.Encoder.EncoderValidator.ValidateVersion()
[22:51:24] [WRN] [1] MediaBrowser.MediaEncoding.Encoder.MediaEncoder: FFmpeg: Failed version check: ffmpeg
[22:51:24] [INF] [1] MediaBrowser.MediaEncoding.Encoder.MediaEncoder: FFmpeg:
[22:51:24] [INF] [1] Emby.Server.Implementations.ApplicationHost: ServerId: 78a6001f83eb44729f41b251081da5c5
[22:51:24] [INF] [10] Emby.Server.Implementations.ApplicationHost: Executed all pre-startup entry points in 0:00:00.1846318
[22:51:24] [INF] [10] Emby.Server.Implementations.ApplicationHost: Core startup complete
[22:51:25] [INF] [10] Emby.Server.Implementations.ApplicationHost: Executed all post-startup entry points in 0:00:00.3778444
[22:51:25] [INF] [10] Main: Startup complete 0:00:05.0359061
[22:51:27] [INF] [10] Emby.Server.Implementations.ScheduledTasks.TaskManager: StartupTrigger fired for task: Update Plugins
[22:51:27] [INF] [10] Emby.Server.Implementations.ScheduledTasks.TaskManager: Queuing task PluginUpdateTask
[22:51:27] [INF] [8] Emby.Server.Implementations.ScheduledTasks.TaskManager: Executing Update Plugins
[22:51:28] [INF] [11] Emby.Server.Implementations.ScheduledTasks.TaskManager: Update Plugins Completed after 0 minute(s) and 1 seconds
[22:51:28] [INF] [11] Emby.Server.Implementations.ScheduledTasks.TaskManager: ExecuteQueuedTasks