[PD] masking delay

[marco zinz]

can anyone help me with a little problem.....

tried to key out some movies with pix_film and pix_alpha. the result got 
not very exactly at the edges.
so i tried masking with pix_film and pix_mask which also didn`t work 
properly (result looked like a non deinterlaced movie)
than i used pix_multiimage and pix_mask which gave me best results. the 
only problem was that it was jittering. this jittering was decreasable 
via seting the framerate of the gemwin to a value like 300 (which takes 
my computer down).

so is there any way to get a nice and clean key or mask with a movie (is 
there any buffer problem or something)
please help

lg
marco