control a mpv via its IPC interface from Emacs

 mpv.el provides helper functions to control a mpv process via its IPC
 interface.
 .
 To start playback, have a look at mpv-play (for single files) and
 mpv-start (for passing arbitrary arguments to mpv, e.g., URLs). Among
 others, mpv.el provides
 .
  - mpv-pause
  - mpv-kill
  - mpv-seek-forward / mpv-seek-backward
  - mpv-speed-increase / mpv-speed-decrease
  - mpv-volume-increase / mpv-volume-decrease
  - mpv-insert-playback-position
  - mpv-seek-to-position-at-point
  - mpv-playlist-next / mpv-playlist-prev