Merge remote-tracking branch 'cus/stable'

* cus/stable:
  ffplay: detect when the created overlay buffers are not valid for the wanted overlay height
  ffplay: do not allow wider window than 16383
  ffplay: use 0 frame delay if redisplaying an already displayed frame
  ffplay: use more sane frame timer resetting logic
  ffplay: only update pts if not redisplaying a frame
  ffplay: fix compute_target_delay to better handle frames with long durations
  ffplay: if playing only audio or video only, show the master clock diff in status line
  ffplay: factorize clock functions
  ffplay: decrease video picture queue size to 3
Merged-by: Michael Niedermayer <michaelni@gmx.at>