Prefer subtitles provided with videos, rather than downloaded subs

Feature Suggestions
1

Currently, subtitles externally downloaded by Plex are preferred. This is backwards. Plex should prefer subtitles in the following order, highest preference first:

  1. Text format embedded in video file;
  2. Image format embedded in video file;
  3. Closed captioning embedded in video stream(*);
  4. Text format on-disk next to video file;
  5. Image format on-disk next to video file;
  6. Downloaded file in Plex metadata.

(* CC data, e.g. that captured in the MPEG2 video stream by DVR, isn’t currently supported, so this would be a feature unto itself.)

The assumption should be that if a video comes with subtitles, then those subtitles match more accurately than whatever Plex found online. Plex can still download a subtitle set and offer it, but those should only be default if they are the only available subtitles.

2

2022 clean-up: duplicate