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Re: 60fps slowmotion at varrying speed without juddering?

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Ben Bigelow
Re: 60fps slowmotion at varrying speed without juddering?
on May 4, 2012 at 2:59:14 am

found some answers here:

the main point:

"The sub pixel interpolation problem can be easily seen can be seen by viewing your comp a frame at a time while zoomed in to say 800% and observing the edge detail. This problem can be especially nasty when you're trying to do a smooth title or credit roll that uses thin fonts. The horizontal lines that make up fine type can almost completely vanish between fields or frames if the text is moving at the wrong speed. You can test this out by creating a single pixel high horizontal line in AE and animating it from bottom to top of the frame. The only speed where you'll get a nice solid line in every frame or field is one that is an exact multiple of the frame rate. IOW, 1 frame 1 pixel of movement, 1 frame 2 pixels of movement, and so on. Move at 1 frame and 1.33 pixels of movement and the line will appear to completely disappear then return as the line moves up the screen."

so multiples between 100% stretch and 200% will judder. hmmm, will have to resort to some motion blurring. I think pixel motion will be the way to go...but it's still juddery and sometimes creates artifacts.

some more resources that may be helpful to others:

thanks for your feedback Ted!

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