[Warner306]

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.

It does seem like a processing issue. Did you try MPC-BE to see if the issue disappears? It is still not clear if the problem is related to XySubFilter and DSPlayer.

Black bar detection runs on the CPU, but this could slow down the GPU. Movies with a 16:9 aspect ratio require more processing than 2.39:1 movies because there are more pixels. This shouldn't be an issue with your GPU if rendering times are reasonable. Try playing with the CPU and GPU queues in general settings to see if you can smooth things out and get the queues to fill. I would try both higher and lower.

I would drop wasted processing like Error Diffusion dithering. But you may want to create special profiles if the issue not related to the subtitle filter.

There are three values: AR, uncroppedAR, encodedAR

Example:

if (AR = 16:9) "16:9"
else "Other"