I'm pretty certain this is a camera issue and not my BI configuration, but I've been proven wrong on so many other things, I'm just gonna toss this out there... The pulsing every 1/2 second or so of clarity and blockiness seems to be intermittent based on how much movement there is in the frame. I recall seeing it when watching it on the camera's GUI - not just on BI. Here are my settings: I've tried higher bit rates, CBR, and even set the i-frame to be equal to the frame rate. Still, I get this: That's extreme and frequent (presumably due to the rain) but even on less dynamic scenes, I still see the pulsing: It's almost like a focus issue. It builds up to razor sharp, then bumps back to down to blocks. Is there no setting to keep the clarity all the time?