Quality-loss in sliced-thread mode

[snow_xmas]

When I use x264 in zero-latency, there are some obvious lines deviding the video into four or more part according to my CPU(my CPU has two core and four threads), which is so distinct that effect quality very much.

[titlis]

I'm a bit newb here... but...

checking out this thread (http://forum.doom9.org/showthread.php?t=147847) might help you.