Video from Blender got color artifacts, whats going on?

I rendered some animation into PNG´s, then used the VSE to produce a video that I later edited in FCPX.

As I´m on a mac I guess exporting as a H264 video was the best option, I actually tried others but the H264 was the only FCPX seemed to accept.
The export from Blender looks nice in VLC-player, however it´s got color artifacts in both QuickTime and FCPX.
I´m not sure what´s causing this, got any ideas?

Video of the animation, it´s most prominent from 2:20 till the end:

i assume encoding went wrong… render again using different settings :eyebrowlift2:

Thread: Optimal Quality Video Encoding Settings??
Latest Changes (in case of using daily build)