const EXTERNAL_SUBTITLE_FORMATS: &[&str];Expand description
Subtitle formats we can render ourselves, delivered as an external sidecar track rather than painted into the video.
Every entry here is text. Image-based subtitles (PGS, DVD, DVB) are deliberately absent: they are bitmaps, so the only way a server can show them on a client that cannot composite them is to burn them into the picture.