[Brian Kim]

“Unfortunately, it won’t remain cool after it’s been rendered. It will look too tall & skinny, or squeezed horizontally if you want to refer to it that way, if you compare it to the original footage.”

Hi Dave,
I just realized in one week I’m about to find myself in a similar situation where I’ll be taking DVCProHD 1080i footage shot vertically (rotated 90), keying out elements, and bringing those elements into a composition where our background plates were shot standard (horizontally oriented).
I know my keyed elements will be tall and skinny, and I had been anticipating that scaling them down vertically is a better option than scaling them wider in order to achieve the correct proportions, however since I saw your feedback in this post I was wondering if you had any other suggestions or advice on how to retain the best resolution/avoid pitfalls.

Will mixing these orientations bug AE CS3 out at all?