Does anyone have a script to create combed NTSC from film?

[FredThompson]

I'm looking for a way to take progressive film source and create interlaced NTSC. Would prefer to do it with AviSynth instead of the big commercial packages. Would someone direct me how to do this?

[neuron2]

blankclip(500).showframenumber() # clip generator
assumetff()
doubleweave()
selectevery(8,0,1,3,4,6)

Strangely enough, this makes a bff 3:2 pulled-down video. Use assumebff() for tff. :)

EDIT: After doing the above, I found this:

http://forum.doom9.org/showthread.php?s=&threadid=55473&highlight=can+I+pulldown

[FredThompson]

Thank you, sir.

Turns out my DVD player won't work with mixed I & P video so some of the progressive needs to be changed back to interlaced.

[stickboy]

Originally posted by neuron2
Strangely enough, this makes a bff 3:2 pulled-down video. Use assumebff() for tff. :)Are you sure about that? AFAICT the field order comes out as you'd expect it.

Edit:
Whoops, you're right. The script I used to check was wrong.

In that case, you can throw a ComplementParity() in there to make it a little more readable. :)