I'm playing two videos in Arena 7.13.2. Both are DXV 3.0 High Quality No Alpha. One of them is 720p and the other is 2160p. Monitors are set to the respective resolution @ 59fps
When outputting the images to two monitors via the Nvidia RTX 2080 SUPER / 8GB graphics card's HDMI and DP outputs, the output is smooth and Arena's fps monitor shows very little variance .
But when outputting via the BlackMagic Decklink 8k Pro capture card (black magic sdi12g->hdmi bidirectional converter to get to the monitor), the fps monitor's value becomes unstable, sinking often to 51-54fps, or even below 50 on occasion. The video is noticeably less smooth.
Does anyone know why?