The key points are:


what is your graphics card output refresh rate?
both outputs: 60Hz

what is your SDI input frame rate?
-59.94 (what I am being told)
These 2 figures dont match - therefore it will stutter at a regular interval.

To reduce the stutter - you must make these figures match - by changing one of them...

I changed input settings and have found something that works
what did you find that works?