Update to 0.8.3, from Leonardo Taccari in PR 49797:

Update multimedia/mpv to 0.8.3.

Changes
* Documentation fixes and updates.
* (Client API) Clarify mpv_opengl_cb_render's viewport parameter
  behavior.

Bug fixes
* (X11) Fix crash on vo_xv:no-colorkey with the Overlay adapter. (bug
  #1629)
* Make the video equalizer work correctly on some VAAPI drivers. (bug
  #1647)
* Prevent OSD from disappearing when clicking on mozplugger. (bug
  #1672)
* The new DVB-S2 support code, using S2API, now builds on FreeBSD.
* Fix decoding of seekable matroska from unseekable network stream.
  (bug #1656)
* (OSX) Fix crashing when closing a VO's window (usually at exit).
  (bug #1657)
* (OSX) Unhide the mouse cursor when over the Dock or Launchpad. (bug
  #513)
* (OSX) Fix mouse cursor autohiding when the player is fullscreen.
* vf_vavpp (VAAPI postprocessing) now deinterlaces video correctly.
* smb:// streams now use the stream cache (used to be inefficient).
* (Windows) Do not hide the mouse cursor when it is hovering the
  window menu.
* Fix 8-channel output on ao_jack. (bug #1688)
* Fix --mf-fps parameter on JPEG files. (bug #1689)
* Fix anamorphic scaling being ignored if it was very minor.

(wiz)