most of my mkvs have a framerate of 23.976 FPS or 24 FPS. so i set up in my setting ( Z20 Pro ) that there is a framerate detection on starting a video. This flickers on switching framerate ) start as mentioned setting up that option. Is there a way to avoid that?
No. All devices in the HDMI chain will need to renegotiate when framerate, resolution, or color space changes. This is not a Zidoo issue.
