Anti-Aliasing Problem

Hi.

I'm working on a clip and have made a logo for The Phantom Menace using Photoshop. The logo looks like this:

http://images5.theimagehosting.com/Menace2.jpg

Now, when I edit the logo into my clip in Adobe Premiere and make it move, I get grey slanting lines moving all over the borders of my image. They were definitly not there originally, as you can plainly see in the image above. I assume this has something to do with aliasing. Can anyone explain to me why they appear and how I can get rid of them?

Here is a downloadable clip of the logo "moving" on Rapdishare (about 1.9 Megs, I need to get better compression):

http://rapidshare.de/files/11036131/Menace.mov.html


Thanks in advance!

 

Yes. It is an antialiasing problem. And it's caused by Premiere's inability to properly rasterize the image now that it's rotated. What you need to do is do the image rotation in Photoshop, or some other program that can better handle these sorts of things. Then bring it into Premiere.

 

Hmmm...I did this- I rotated the picture in Photoshop and removed the rotation effect in Premiere. It doesn't help, I'm still getting grey lines all round.

EDIT: By the way, I'm importing the .psd file straight into premiere, and in it everything but the text (i.e the background) is transparent. Could that be a problem?

 

My immediate thoughts. Very probably, since the problems only occur at the edges of your image. I'd put a fairly secure bet on this being the problem - make sure the backdrop is black and not transparent, export it as a BMP or suchlike, and it'll be fine.

 

The thing is I do need it to be transparent. I need to be able to place it over other footage. So isn't there any way this can be done?

 

Unfortunately, you are left with only a couple of options if you are desperate to get rid of the grey lines:

1. Convert the section of footage you want to place your logo over into a filmstrip and then bring it into photoshop. Then apply your image getting larger frame by frame. That said, this is a bad idea. The filmstrip files premiere exports can easily become huge and unwieldy to work with. Also trying to figure out the appropriate amount of zoom per frame to create a smooth motion for your title would be extremely tedious. Which brings us to your best option (if available):
2. If you have access to Adobe After Effects or another compositing program, use that. It is capable of properly rasterizing your image over the footage very simply.

Hope this helps.