Anti-alias in Motion

Aliasing usually doesn't cause flicker. Sounds like you've got simple issues from trying to resolve single-pixels features or lines into an interlaced project. If you cannot redo the photos, you're going to add a bit of blur, probably 2 or 3 pixels. That's really all anti-aliasing does anyway, adds some interpolation between adjacent pixels, effectively adding a bit of blurt, and the result is an illusion of more detail.

bogiesan

You should first try to change your render quality setting from "normal" to "best". That should do the trick.

Jacob