Wouldn't the encoder just ignore the "la-quality" and "la-window-size" options when using "ICQ" for QSV HEVC? With QSV HEVC there are no such "LA" modes. I'm referring specifically to the "LA-ICQ" mode that is available for QSV H264 (along with 2 other "LA" modes - "LA" and "LA-HRD" ). A "clean install" of the Nvidia drivers (the option in the installer) has worked for me when something went bad with the custom display modes. Start with no custom refresh rates setup and reboot after setting it up. Getting one tuned 23Hz refresh rate with madVR's tool has always worked well for me, though getting any other custom refresh rate is usually much trickier. I used a matched 23 Hz refresh rate when watching HDR movies, which I haven't done in a while. A blended frame will have a VERY different peak brightness compared to a non-blended one in that case. I am not sure I ever tested white credits over black background in HDR with smooth motion. I can see how smooth motion does not play well with current HDR displays. Do you have "don't use linear light for smooth motion frame blending" checked? What happens if you tone map with pixel shaders to a target peak nits of 600? Specifically credit crawls are a nightmare. The issue I have with smooth motion is I get flickering with hdr content. EDIT: Seems like the second line is not displayed, perhaps after a new line is started?
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