Enable proper display of elapsed time when paused with VAAPI.

Make sure av_pause_frame is updated so that the player can pick up the
current frame number while paused.  Refs #10962
(cherry picked from commit 841ff3a359ce668eb51ef1da917ffab5a0932302)

Conflicts:

	mythtv/libs/libmythtv/videoout_openglvaapi.cpp
(cherry picked from commit 6be8c10b39dcbe0fe825d22fec70795d87972a25)
Fixes #11463, this removes the binding Call-time pass-by-references
Allow more than one keyframe per payload.

See 69cd78b40 for fixes/0.26
See edefeb6f4 for 0.27-pre

Fixes #11459