[depends/ffmpeg] - fix sed (didn't work on osx) - this fixes pkgconfig from ffmpeg configure
[epg] fix implicit std::string constructor with NULL argument
[epg] refactor Update() method into constructor as it's never used elsewhere
Merge pull request #5037 from xhaggi/fix-epg-stdstring-crash

[epg] fix implicit std::string constructor with NULL argument
Merge pull request #5036 from Memphiz/fixffmpegsed

[depends/ffmpeg] - fix sed (didn't work on osx) - this fixes pkgconfig f...
[addons] sync with repo
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: some rework and documentation
renderer: bump buffers to 5
videoplayer: update frametime, it might change due to fps detection
videoplayer: give streams with invalid fps a chance for fps detection
dvdplayer: allow rewinding at end of stream, do a seek after rewind
dvdplayer: observe pts counter overflow
dvdplayer: avoid short screen flicker caused by unnecessary reconfigure of renderer
vdpau: advanced settings for auto deinterlacing
player: fix rewind
OMXPlayer: some caching fixes for pvr
fix incorrect display of fps when dr kicks in
ActiveAE: slightly reduce buffer size