What do you mean by pixelated?
If you scale them up, you will make the pixels bigger and this usually makes them more noticeable. But if you have to scale down every frame, you are wasting tremendous amounts of processing time. Shoot at exactly the pixel dimensions you want to use in the final presentation format. Most DV cameras have a still image mode, use that if you can’t use a digital SLR.
But if you are talking about the traditional use of the term pixelation in stop frame animation, your ratio of still images to running time should not be any greater that 20 to 1. You can get away with 15 frames of animation for 30 frames of screen time, what we call “on-twos” but you really can’t take that down to “on-threes” unless you are ware of the stylistic impact such economies impart on the finished product.
Like an idiot, I’ve posted answers to both of your posts.
bogiesan