I have a map graphic with a slow move in with some perspective tilts along the way that shows Aliasing or Line Twitter on the Text. We sent it back to graphics and they say they added motion blur but the artifacts are virtually the same as the original once it is imported into Avid. In QT on the computer screen all looks fine. The progressive scan on the computer display is clean. It is only when the graphic is imported into Avid and displayed on my JVC program monitor. I can add a pixel blur and the issue goes away. The Text that is twittering has a thin outline/shadow of black that looks to be soft edged but still very thin. That appears to be what is causing the Aliasing/Line Twitter on the slow gradual move.
We are in an HD 1080 23.976 project. HD Projects are square pixels just like the graphic and the computer display, right? So what is it about displaying this graphic once imported into Avid and output as 23.976 psf to the JVC display that creates the line twitter? I was initially thinking that the way After Effects has no ramp on text edges like Avid does might be a contributing factor but I'm not sure. Now if the world of non square pixels was involved I could see more reason that the scaling nature of that would induce line twitter not visible on the computer display. What is it about the psf signal out of Avid that induces the line twitter/aliasing. Is it the monitor doing some kind of internal scaling? In the sdi input mode I'm in the JVC won't let me hit the 1:1 button which leads me to believe it is not scaling the image but perhaps I'm incorrect here.
I think the ultimate solution on the After Effects side would be not so thin a shadow outline but just trying to understand when it's a square pixel for square pixel import why does this still happen. I must be missing the obvious here.
John Moore
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
Barking Trout Productions
Studio City, CA
bigfish@pacbell.net
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Posted by: John Moore <bigfish@pacbell.net>
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this is the Avid-L2
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