Performance Issues with Jellyfin on Beelink EQ12: Docker & Remote SAMBA Storage

[TheDreadPirate]

The subtitle sync issue depends on what kind of subs they are and whether Jellyfin is direct playing them or not. AFAIK, subtitles that are burned in rarely desync, but subtitles that are direct play can desync on weak clients (usually browsers).

MP4, MKV, H264/H265, embedded vs external subtitles doesn't really matter. What matters is subtitle type, whether the subs are direct played or burned in, and whether the client is weak or robust and capable.

If you could provide jellyfin and ffmpeg logs via privatebin.net that would help troubleshoot the issue.