because it is weird. the way i understand it is that this is the size to which the image gets shrunk for processing in hyperion. Now increasing these value drastically should increase load, no? But if the original problem is really connected with the RAM bandwidth of the RPI as HiassofT pointed out, then i am wondering how increasing the load fixes the problem... but maybe i am mistaken on something here...
anyway. i have switched to Hyperion.NG which seems vastly superior to the old Hyperion in terms of accessibilty/features/you name it.
The fix also works here by increasing width/height to 640x360 (default is 80x45 here). No more HDMI signal drop when playing 1080p 25fps / 50hz, so thanks again.
if anyone is curios this is the automated install script one of the devs wrote to get Hyperion.NG on LE
you control/configure hyperion.ng via http://IP.OF.YOUR.RPI:8090
I have also HDMI signal drops when playing widevine Videos. Doesn't matter if Hyperion or Hyperion.ng. Can you test it with amazon VOD plugin, maybe with Family Guy?
EDIT: interesting! At the Live-Video on Hyperion there aren't HDMI drops.