In Libreelec I am using Jellyfin for Kodi. I have enabled force transcoding. I would like the subtitles in Jellyfin to be burned into the video with no exceptions. There’s an option to disable subtitle extraction on the fly but this doesn’t burn in the subtitles
You can use a tool like Handbrake or ffmpeg to burn titles directly into your videos, but you’d have to re-encode the files. Perhaps not what you actually have in mind?