I have also an problem with the hdtv (720p50) playback in combination with DVBViewer (See HDTV 720p50 playback problems (stuttering))
Yesterday I compiled the newest pvr.dvbviewer release 2.4.14 with the WoL functionality but the stuttering is still present 
.
2 Days before I installed TvHeadend on Kubuntu 16.04.3 LTS and recognized also problems with the HDTV playback on Vero4K with the TvHeadend PVR client.