SelectEvery(280,1,2,3,4,5,6,7,8,9,10,11,12,13,14) AssumeFPS(24.976) Put that at the end of your avs script, it should give about the same result as SelectRangeEvery(280,14) plus or minus a frame or two. Naturally you'd have to adjust your target fps as needed and manually load that in virtualdub. At least that's what I use and there may well be a more simple way to do it. AssumeFPS may not even be needed but I use it to check the effect of different filters.