Question / Help why have the dark block?

[DeDeMeowOuO]

ttps://www.twitch.tv/videos/306572255 6:00~the end
it has so many dark block...why?
CPU:I7-8700
RAM:16GB

 

[R1CH]

Looks like an encoder issue, are you using x264? If not give that a try.

 

[DeDeMeowOuO]

yeah i use it...need more information?
btw does OBS support HDMI?