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Question about Animate()

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Seems like a cool function that could assist me in this one task. I sometimes get videos that are interlaced and downsized to 480p 432p 384p etc. which screws up the interlacing and makes it hard to properly deinterlace. Usually I resize to a lower vertical resolution like 400 from 480, deinterlace and resize back to 480. Different vertical resolutions change the size of the moire shimmering and a perfect one will stabilize completely.

So anyway, I wanted to use the animate function to resize from 640x2 to 640x480, deinterlace then resize back to original so I can find the sweet spot when I usually do this rather than choosing a rough mod16 approximation.

This is my usual script for this situation:
Code:

avisource("C:\video.avi")
lanczosresize(640,400)
QTGMC(preset="slower")
lanczosresize(640,480)

How would I animate something like this?

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