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<blockquote data-quote="Owlsroost" data-source="post: 656218" data-attributes="member: 83973">Hi David,Tell me about it...it's quite sensitive to the balance of thread priorities and which threads are under MMCSS control (and other time related things) - I've spent hours and hours playing around adjusting priorities and delay timers etc to arrive at the current setup.m_frameRateRatio is the (integer) ratio of the display-to-video frame rates - see GetFrameRateRatio(). It's zero whenever there isn't a close integer relationship between the two rates (within 1.5%). When it's zero some processing is disabled because it's pointless or makes the situation worse.That's what should happen - it's not a bug. It doesn't matter if you use pre- or post-increment for the loop variable (or i=i+1) - it's updated at the end of each loop iteration, not at the begining. I normally use post-increment - those lines were copied from elsewhere and I didn't notice they used pre-increment....Do you mean:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *pTargetTime = systemTime + 15000; //delay in smaller chunks&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; is now:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *pTargetTime = systemTime + 10000; //delay in smaller chunks&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Tony</blockquote>

[QUOTE="Owlsroost, post: 656218, member: 83973"] Hi David, Tell me about it...it's quite sensitive to the balance of thread priorities and which threads are under MMCSS control (and other time related things) - I've spent hours and hours playing around adjusting priorities and delay timers etc to arrive at the current setup. m_frameRateRatio is the (integer) ratio of the display-to-video frame rates - see GetFrameRateRatio(). It's zero whenever there isn't a close integer relationship between the two rates (within 1.5%). When it's zero some processing is disabled because it's pointless or makes the situation worse. That's what should happen - it's not a bug. It doesn't matter if you use pre- or post-increment for the loop variable (or i=i+1) - it's updated at the end of each loop iteration, not at the begining. I normally use post-increment - those lines were copied from elsewhere and I didn't notice they used pre-increment.... Do you mean: *pTargetTime = systemTime + 15000; //delay in smaller chunks is now: *pTargetTime = systemTime + 10000; //delay in smaller chunks Tony [/QUOTE]

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