MPV_EVENT_TRACKS_CHANGED constant
int
const MPV_EVENT_TRACKS_CHANGED
The list of video/audio/subtitle tracks was changed. (E.g. a new track was found. This doesn't necessarily indicate a track switch; for this, MPV_EVENT_TRACK_SWITCHED is used.)
@deprecated This is equivalent to using mpv_observe_property() on the "track-list" property. The event is redundant, and might be removed in the far future.
Implementation
static const int MPV_EVENT_TRACKS_CHANGED = 9;