Trouble playing some media files

[TheDreadPirate]

Upon further inspection, it looks like it was attempting to extract the subtitles to send to the client separately but failed.

Code:

System.NullReferenceException: Object reference not set to an instance of an object.
   at MediaBrowser.MediaEncoding.Attachments.AttachmentExtractor.<>c.<ExtractAllAttachments>b__8_0(MediaAttachment a)

I'm wondering if the subs are corrupt or something.

What happens when you try to manually remux one of the south park files?

Code:

/usr/lib/jellyfin-ffmpeg/ffmpeg -fflags +genpts -i "/path/to/library/South Park - S20E02 - Skank Hunt.mp4" -map 0 -codec copy newFile.mkv