[entourage2111]

Hi Warner, the subtitles are part of the MKV file I'm playing and are PGS. Disabling D3D11 didn't help.

I spent quite a few hours last night trying to find a pattern in the issue. Here's what I found.

I play 1080p files on NGU Sharp Very High. Usually no issues, but when I enable the black bar detection, render queue drops to 1-2/8 after 60 seconds of play. When I select NGU high, I found that the issue disappeared. Is this just a graphic card limitation? I'm surprised considering the 1080ti is the best card atm and I thought it would be able to milk 1080p on very high?

With 4K, I run on NGU High. Last night I found that movies filmed in 1.78:1 gave the same issue even without black bar detection. All movies filmed in this ratio (Spiderman 1, Justic League, DK Trilogy, Interstellar), led to a fall in the render queue after 60 seconds of play and infinite dropped frames. 

Strangely, films that were 2.39:1 or similar plays on NGU high perfectly. Is this normal? Does it really take more processing power to work with 1.78:1 images?

If so, is there a way to set a rule in MadVR to select NGU medium with 16:9 movies and NGU high for everything else? Right now, I use a rule between 1080p and 2160p like you explain in the tutorial you referenced. I would like a rule within this to select 2160p and then determine whether it will be NGU high or low.

I hope that makes sense. Thanks Warner.