I don't see anything particularly wrong with the logs outside of the fact you're attempting to do 1080p -- I generally don't recommend 1080p for most computers. It can cause that "lagging" feel on computers (even happens on mine and I have a pretty decent computer).
As others have said, 720p is usually that sweet spot for HD that works great for most PCs and still looks really good. Also you don't need that much bitrate for it either, I'd recommend reducing it to about 3000 or 3500 at most if doing 720p.