Doom9's Forum - View Single Post - madVR - high quality video renderer (GPU assisted)

Asmodian · 5th September 2013, 23:37

I understand that is how smooth motion works.

Each frame is displayed for the same amount of time. If it needs to be displayed for 41.67 ms (24 fps) but using screen refreshes at 16.67 ms (60 fps) it displays the frame for two refreshes and blended into the next frame at 50%. This is "synced" to the refresh rate so, given that the refresh rate is never exactly 60 Hz and video is 24/1001 fps, the pattern of blends isn't actually 100%, 100%, 50% but more like 9.7%, 100%, 100%, 40.55% and continuously changing.

This generates lots of blended frames but given how humans see we only notice it as a slight blurring of the image, or a slight reduction in "sharpness", and much preferred to judder in my opinion.

Edit: Oh and the partial %'s are totally made up by me to illustrate the example. I have no idea what percentages madshi is actually using, it might be more complex than my simple 50% time = 50% blend.

5th September 2013, 23:37	#20023 \| Link
Asmodian Registered User Join Date: Feb 2002 Location: San Jose, California Posts: 4,407	I understand that is how smooth motion works. Each frame is displayed for the same amount of time. If it needs to be displayed for 41.67 ms (24 fps) but using screen refreshes at 16.67 ms (60 fps) it displays the frame for two refreshes and blended into the next frame at 50%. This is "synced" to the refresh rate so, given that the refresh rate is never exactly 60 Hz and video is 24/1001 fps, the pattern of blends isn't actually 100%, 100%, 50% but more like 9.7%, 100%, 100%, 40.55% and continuously changing. This generates lots of blended frames but given how humans see we only notice it as a slight blurring of the image, or a slight reduction in "sharpness", and much preferred to judder in my opinion. Edit: Oh and the partial %'s are totally made up by me to illustrate the example. I have no idea what percentages madshi is actually using, it might be more complex than my simple 50% time = 50% blend. Last edited by Asmodian; 5th September 2013 at 23:40.