SelectEvery

SelectEvery (clip, int step_size, int offset1 [, int offset2 [, ...]])

SelectEvery is a generalization of filters like SelectEvenand Pulldown. I think the easiest way to describe it is by example:

SelectEvery(clip,2,0)      # identical to SelectEven(clip)
SelectEvery(clip,2,1)      # identical to SelectOdd(clip)
SelectEvery(clip,10,3,6,7) # select frames 3, 6, 7, 13, 16, 17, ... from source clip
SelectEvery(clip,9,0)      # select frames 0, 9, 18, ... from source clip

# Take a 24fps progressive input clip and apply 3:2 pulldown,
# yielding a 30fps interlaced output clip
AssumeFrameBased
SeparateFields
SelectEvery(8, 0,1, 2,3,2, 5,4, 7,6,7)
Weave

$Date: 2004/03/09 21:28:07 $