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Flickering of small lines and certain colors of text when casting with NvFBC #154

@Jaymus3

Description

@Jaymus3

Describe the Bug

When streaming, certain solid color lines on the screen and certain colors of text have a visible flickering effect sort of like scanlines on a CRT. Media attached as demonstration:

CleanShot.2022-05-07.at.03.51.20.mp4
CleanShot.2022-05-07.at.04.02.01.mp4

Expected Behavior

No visible flickering; picture closer to original

Additional Context

Flickering has been present on multiple builds of sunshine, but only when screencasting with NvFBC. When casting with X11, lines and text look normal.
Stream information:
CleanShot 2022-05-07 at 03 57 53

Sunshine Host Operating System and Version

Kubuntu 22.04

Architecture

64bit

Sunshine Version

0.13.0, also nightly build

GPU Type

NVIDIA

GPU Model

RTX 3070Ti

GPU Driver/Mesa Version

510.60.02

Capture Method (Linux Only)

X11, NvFBC

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