On Arch, Jellyfin does something with ffmpeg eating up alll cores

[el_toro_2022]

After waiting for about 24 hours after starting the daemon, it has approached consuming the CPU.

systemctl status jellyfin
● jellyfin.service - Jellyfin Media Server
    Loaded: loaded (/usr/lib/systemd/system/jellyfin.service; disabled; preset: disabled)
    Active: active (running) since Sun 2025-02-16 10:32:40 -05; 20h ago
Invocation: 277a8cd7bbe44e7e9d2e636de27db028
  Main PID: 1558490 (jellyfin)
      Tasks: 43 (limit: 38117)
    Memory: 679.9M (peak: 1G)
        CPU: 23h 1min 12.719s
    CGroup: /system.slice/jellyfin.service
            ├─1558490 /usr/bin/jellyfin --webdir=/usr/share/jellyfin/web --ffmpeg=/usr/lib/jellyfin-ffmpeg/ffmpeg
            └─1983812 /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i "filesrv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/T>

Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Runtime.CompilerServices.AsyncTaskMethodBuilder1.AsyncStateMachineBox1.MoveNext(Thread threadPoolThread)
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.Tasks.AwaitTaskContinuation.RunOrScheduleAction(IAsyncStateMachineBox box, Boolean allowInlining)
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.Tasks.Task.RunContinuations(Object continuationObject)
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.Tasks.Task.DelayPromise.CompleteTimedOut()
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.TimerQueueTimer.Fire(Boolean isThreadPool)
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.ThreadPoolWorkQueue.Dispatch()
Feb 17 06:53:25 miranda jellyfin[1558490]:    at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
Feb 17 06:53:25 miranda jellyfin[1558490]: --- End of stack trace from previous location ---
Feb 17 06:53:25 miranda jellyfin[1558490]:    at Rssdp.Infrastructure.SsdpCommunicationsServer.SendFromSocket(Socket socket, Byte[] messageData, IPEndPoint destination, Canc>
lines 1-22/22 (END)

also, filtering the log on ffmpeg:
Feb 17 05:41:51 miranda jellyfin[1558490]: [05:41:51] [INF] Trickplay generation: /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i file:"/srv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/The X-Files (1993) S01/The X-Files (1993) - S01E07 - Ghost in the Machine (1080p BluRay x265 Silence).mkv" -an -sn -vf "fps=0.10000000149011612,setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*(a*sar))\,320)/2)*2:trunc(ow/(a*sar)/2)*2,format=yuv420p" -threads 2 -c:v mjpeg -qscale:v 4 -fps_mode passthrough -f image2 "/tmp/jellyfin/ab70575ea82d4fcba56c2f0196513c98/%08d.jpg"
Feb 17 05:46:24 miranda jellyfin[1558490]: [05:46:24] [INF] Trickplay generation: /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i file:"/srv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/The X-Files (1993) S01/The X-Files (1993) - S01E12 - Fire (1080p BluRay x265 Silence).mkv" -an -sn -vf "fps=0.10000000149011612,setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*(a*sar))\,320)/2)*2:trunc(ow/(a*sar)/2)*2,format=yuv420p" -threads 2 -c:v mjpeg -qscale:v 4 -fps_mode passthrough -f image2 "/tmp/jellyfin/491c5cdd85c84d70803c9195af4d9f12/%08d.jpg"
Feb 17 05:51:00 miranda jellyfin[1558490]: [05:51:00] [INF] Trickplay generation: /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i file:"/srv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/The X-Files (1993) S01/The X-Files (1993) - S01E11 - Eve (1080p BluRay x265 Silence).mkv" -an -sn -vf "fps=0.10000000149011612,setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*(a*sar))\,320)/2)*2:trunc(ow/(a*sar)/2)*2,format=yuv420p" -threads 2 -c:v mjpeg -qscale:v 4 -fps_mode passthrough -f image2 "/tmp/jellyfin/617d87a3cc2847ad847291f14d6cf0bc/%08d.jpg"
Feb 17 05:55:42 miranda jellyfin[1558490]: [05:55:42] [INF] Trickplay generation: /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i file:"/srv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/The X-Files (1993) S01/The X-Files (1993) - S01E15 - Lazarus (1080p BluRay x265 Silence).mkv" -an -sn -vf "fps=0.10000000149011612,setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*(a*sar))\,320)/2)*2:trunc(ow/(a*sar)/2)*2,format=yuv420p" -threads 2 -c:v mjpeg -qscale:v 4 -fps_mode passthrough -f image2 "/tmp/jellyfin/f9705f0fec204f2daab4b8b0038892b6/%08d.jpg"
Feb 17 06:00:09 miranda jellyfin[1558490]: [06:00:09] [INF] Trickplay generation: /usr/lib/jellyfin-ffmpeg/ffmpeg -loglevel error -i file:"/srv/deluge/Downloads/The X-Files (1993) S01-S11 (1080p BluRay x265 10bit EAC3 5.1 Silence)/The X-Files (1993) S01/The X-Files (1993) - S01E05 - The Jersey Devil (1080p BluRay x265 Silence).mkv" -an -sn -vf "fps=0.10000000149011612,setparams=color_primaries=bt709:color_trc=bt709:colorspace=bt709,scale=trunc(min(max(iw\,ih*(a*sar))\,320)/2)*2:trunc(ow/(a*sar)/2)*2,format=yuv420p" -threads 2 -c:v mjpeg -qscale:v 4 -fps_mode passthrough -f image2 "/tmp/jellyfin/91a0b465995241e09f8ba8793c8f4d65/%08d.jpg"

It appears to be scanning my library of video content, but not clear what it's doing.