clip1 = AVISource("E:\A.avi")
clip2 = AVISource("E:\B.avi")

clip12 = SeparateFields(clip1)
clip22 = SeparateFields(clip2)

clip13 = SelectEven(clip12)
clip23 = SelectOdd(clip22)

clip3 = interleave(clip13, clip23)

clip4 = AssumeFieldBased(clip3)

weave(clip4)