I updated to directory opus 12.9 on 07/06/2018
when I open the viewer none of the video formats will play I get audio the timeline moves but I just get a black screen
the videos play in players like GOM player VLC player windows media player no problems.
I have windows codecs pack
I'm using activex + preview + office plugin
windows media player is set up as default player
all videos played perfectly before I updated
I have downloaded the other update 12.9.1 08/06/2018
but still black screen video with audio in the preview pane
any help would be appreciated.