Jellyfin server in libreelec won't play video (SOLVED)

I uploaded some new videos for the jellyfin server to play and it reported a fatal error by the jellyfin player. Checking against other videos which played okay, I focused on the encoding of the 'faulty' videos. Turns out the jellyfin player did not like the way the subtitles were encoded in the videos. A word to the wise, don't assume the server is faulty. Check the video encodings.