Mike, I don’t think we are communicating properly, or we are discussing different issues. By the way, I learned about this issue from Jacob Rosenberg on his Total Training DVD for What’s New in Premiere Pro 2. He didn’t do this, he just told us about it.
Try this:
Put a large still in the sequence without automatic scale to fit. I used a 2272X1704 still I had handy. Manually resize it with the scale parameter in the motion effect. I used 29%.
Put a second copy next to it on the sequence. Scale it using the right-click context menu and select “Scale to Frame Size”.
The first thing I see is that there are some very thin black bars on either side of the second still, so I would want to zoom in a bit to get rid of them. So I move it to 101%. No problem.
OK, now let’s get fancy. Animate the first still from 29% at the first frame to 58% at the last. Looks fine, right?
Now, animate the second still from 101% to 202% – which should be the same size, right?
I was lucky and a person way far off in the background had on red shoes. The shoes were very clear in the first still, and a bit blurred in the second. And we are not even at 100% yet compared to the original still.
Now lets get crazy. Get rid of the keyframes by turning off the stopwatch on both stills. Bring the first still to two times it’s current size. From 58% to 116% – and the second still from 202% to 404%.
OK? See the problem? Any time you zoom in on an automatically scaled clip by any amount, you lose quality and if you zoom back in on a manually scaled clip, you don’t begin to lose quality until you exceed 100%.
Steven
http://www.stevengotz.com