I recently added a few TV shows on my emby server and I'm having an issue with the subtitles. The files have English subtitles, but they are mislabeled inside the mp4 files. If I look at the files using ffprobe, the subtitle and audio streams show "und" next to them (my other files show "eng" for the audio & subtitle streams). Emby seems to go on the assumption that the "und" audio streams are English, and uses them automatically. For the subtitles though, since emby does not see English subtitle streams, it follows through with the server's subtitle settings and tries to download subtitles from online. I have two questions:
1) is there a way to set emby to assume "und" language subtitle streams are English just like it does with "und" audio streams?
2) how can I set those subtitle streams in the mp4 files to have the correct label of "eng"?
Thanks