Intel VAAPI howto with Leia v18 nightly based on Ubuntu 18.04 server
Quote from madshi / madvr guru:

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It is true that with a prefect color neutral grayscale, letting madVR render to 16-235 means that madVR doesn't have to dither. However, even black & white movies are usually not 100% color neutral. They often have a slight color tint. And as soon as chroma is anything but exactly color neutral, madVR instantly has to dither. Which is the case for 99.99% of all movies out there.

/unquote
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Could it be that a grayscale test isn't optimal for testing dithering in 255-limited-limited? The above reasoning would be in line with your grayscale test. That's why it would be interesting to see results with real source with minor banding inherent (not perfect grayscale).

Correct me if I'm wrong.
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Messages In This Thread
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Intel VAAPI howto with Leia v18 nightly based on Ubuntu 18.04 server18