This is very-very good codec, fast and result small file, uses 2 processors too... But very often freeze if "use multithreaded" is checked. I use only YUY2 mode.
Well I see, new version 1.3.11, Good news.
Problem with new codec (and last version) : codec uninstall not working (under programs add/remove)
Sorry my poor english, and thanks of developer : this is very good lossless video codec.