If you do a dynamic RAM preview (set a loop region around the area of the timeline in question, press shift+B), does it also show this same stuttering of the motion, or is it only present upon rendering it?
UPDATE: This seems to be an NVENC problem, as rendering in AVC the outcome is normal. The graphics card driver was updated tonight as I thought that was the problem but it still persist. Does hardware rendering come with janky outcomes/ or am I doing something wrong?
I've been doing testing of it this week and seeing glitches with multiple encoders including Voukoder x264. Temporarily setting dynamic ram preview to zero avoids it. Only affects my laptop, not desktop (see signature).
I never had any need to reduce DRAM preview setting from default 5% to 0%.
The time that I suffered with such glitches was at the time my GPU wasn't meeting minimum specs for 4k. Solution at that time was for me deactivating GPU support in the Video settings tab of preferences.
As far as I know setting DRAM preview to 0% has also impact on preview speed.