after some minor testing i've come to the conclusion that addborders (0,0) in the avisynth script slows down my video encoding by a rough 5%. of course i can delete it from the avisynth-script manually, but is there a more permanent solution? The new "frameserver" layout has got met confused :D another thing: on a dual cpu machine, video encoding is much less affected if nero's affinity is set at cpu 1 in stead of 0! i'm not sure if anybody cares but there it is. cheers :)