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<blockquote data-quote="rtv" data-source="post: 268285" data-attributes="member: 12309">GraphicContext.TimePassed basically uses QueryPerformanceCounter like this:duration = (stop - start) / frequencyThe frequency however is only determined by QueryPerformanceFrequency when the Timer is initialised for the first time. With Cool&amp;Quiet enabled you'll have different frequencies later for sure (e.g. higher CPU load during media playback).I've fixed the frequency to be retrieved on every timer call now (Still wondering why the API does offer to call something like QueryPerformanceCounter without QueryPerformanceFrequency; the other way could be useful - but this?).In addition I've added a simple yet effective approach to drop up to 5 frames of MP's GUI rendering when those are too late to keep up with a video preview running a maximum of 60 FPS.This should cure stuttering previews on stressing screens (like TV Guide).Both fixes together might fix the non-EVR related part of the flickering issue. Please tell me how it works out.</blockquote>

[QUOTE="rtv, post: 268285, member: 12309"] GraphicContext.TimePassed basically uses QueryPerformanceCounter like this: duration = (stop - start) / frequency The frequency however is only determined by QueryPerformanceFrequency when the Timer is initialised for the first time. With Cool&Quiet enabled you'll have different frequencies later for sure (e.g. higher CPU load during media playback). I've fixed the frequency to be retrieved on every timer call now (Still wondering why the API does offer to call something like QueryPerformanceCounter without QueryPerformanceFrequency; the other way could be useful - but this?). In addition I've added a simple yet effective approach to drop up to 5 frames of MP's GUI rendering when those are too late to keep up with a video preview running a maximum of 60 FPS. This should cure stuttering previews on stressing screens (like TV Guide). Both fixes together might fix the non-EVR related part of the flickering issue. Please tell me how it works out. [/QUOTE]

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