Square Pixels Question

I have made an animation that is 640 X 480 with Square Pixels.
I was told that I have to give the animation to a video guy, but that it has to be 720 X 480.
Do I simply have to change it to the .9 setting and change the settings to 720 X 480? Because when I tried that, it looked stretched on my computer screen. It looks correct at 640 X 480 with square pixels.
Thanks.

After Effects automatically and properly combines footage of any pixel aspect ratio with footage of any other pixel aspect ratio. The only time things get fouled up is when you mis-interpret the footage.
If your footage is square pixels it must be interpreted as square pixels. If it is DV widescreen then it must be interpreted as DV wide screen. After Effects will try and guess what the pixel aspect ratio is supposed to be for any footage that isn't tagged with a PAR identifier. It makes this guess based on the size of the frame.
For example, if you create a square pixel image in photoshop that's 720 X 480 the After Effects will assume that it's D1 Pixel aspect ratio because 720 X 480 is the standard size of a D1 frame. In this case, After Effects guesses wrong so you have to manually correct the problem and set interpretation to square pixels.
In your case all you have to do is drop your square pixel comp in a D1 comp for render and you're good to go. There will be a bit of black on the left and right side of the rendered video but you will never see these black edges in a TV when the video is played. In face, most DV cameras don't even fill the frame and leave 4 to 9 pixels of black on the right and left edge of the frame anyway.
I hope this helps. Just remember that your footage should always be interpreted as what it is, that AE will guess properly unless you create square pixel footage that is a standard rectangular pixel size or your widescreen footage does not have a PAR tag in the header.
As far as rendering goes, unless you can find a place to designate the pixel aspect ratio in the video settings the codec does not support such a tag and the footage may have to be interpreted properly in your NLE or other app to prevent distortion.

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Thank you for responding to my post. My question is can I edit and output in Non-DV format (non-interlaced video) with CS3?
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[URL=http://imageshack.us][IMG]http://img155.imageshack.us/img155/2331/interlacevsnoninter lacehc8.png[/IMG][/URL]

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t_Mc wrote:
You are never going to actually see a non-square pixel JPG image on your square pixel computer monitor.
Well, I just showed you one.
No you did not. Our displays only show square pixels.
t_Mc wrote:
WHY?
Are you yelling?
Where will this image appear? Why do you need PAR if it looks "perfect" on the web without it? What is your output intent? 800x533 is not a video dimension.
That is not important.
I asked WHY because you started this discussion with extreme ambiguity. Others have typed many words to try to help you but you have helped no one in return by explaining yourself and what you are trying to do.
t_Mc wrote:
Eh... you (and every other photographer with javascript gimmicks) may want to re-evaluate how you post and "protect" images. PAR is not much of a step up from what you have.
You making RUDE assumptions that are ridiculous This is only the second question I have asked. Thanks for the help lady!
If I wanted to be rude, I would let you continue to waste your time on pointless techniques that really do not protect your images.
You can prevent others from making assumptions by...
fully explaining what you are trying to do!
EDIT: oy, kids!

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Message was edited by: teresita

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Hi:
Thanks so much for your response.
my sequence settings are
see attached
My export settings
see attached

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