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Shaky Images
I am trying to create a movie of scrolling logos and ads. I created a few comps, 1600(+)x600, placed a logo, followed by ads(jpgs). Imported them into a 800×600 comp and had them scroll (separately) in and out, using Position keyframes. The result looks very ‘shaky’, not smooth at all. I rendered with different codecs, at different speeds, etc. etc.
No luck.
Any advice would be great. The images just have to scroll smoothly on and of the screen.Thanks!
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3 Replies
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Hi,
I’m not sure if this would help, but one thing that can cause a “juttery” animation is if you are rendering a progressive animation and then playing it on an interlaced monitor. While not grossly annoying, this can look unpleasant and rendering interlaced might smooth things out.
Alternatively if you are rendering an interlaced animation and the field order gets reversed, this can look really bad on an interlaced monitor (although it should look fine on a computer monitor.) NTSC is usually lower (even) field dominant.
Is the animation intended to play on a computer monitor? The 600×800 comp seems non-standard so I am assuming it is not for television. If that is the case then, I suppose, interlacing wouldn’t be an issue.
Is it possible that your hard drive cannot handle the bandwidth necessary to play the animation? In that case the animation might be perfectly fine, but that it needs to be on a RAID to play back at full speed.
Anyway, I know these are pretty boneheaded ideas, but those are the things that immediately come to mind.
Another possibility is that they are scrolling fast and that some motion blur would help them look better. If there is no blur in the motion, that could cause a “shaky” or “stuttery” look.
I hope this helps, or at least someone comes up with a better answer to your question.
Lars
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Thanks for your thoughts.
Yes, it will be playing on a computer. I’m working on a G5 right now. Don’t know if a more powerful computer would make a difference. Tried the ‘offset effect’, same jittery result. The motion blur helps a little, but of course the print ads shouldn’t be looking blurry.
Seems this should be an easy task, but it isn’t.
Anybody having any good ideas? -
Scroll text
This earlier post from Filip has helped many, especially the second part, the expression(s) to make sure the text fall on whole pixels. It might or might not help.
Name: Filip Vandueren
Date: Jul 12, 2006 at 3:32:42 pm
Subject: Re: Rolling Credits have me stumped….Square vs. Anamorph should only affect the horizontal scaling, not a problem with a vertical scroll.
Q: Did you render the animation out without using Fields ?
Using Fields, it will look crappy on the monitor, but much smoother on a video. (if you choose the correct field-order !)
If you’re not outputting to film or the web (other media than TV or DVD), absolutely render with fields.I always add a gaussian or fast blur of less than a pixel (0.25 – 0.5) to any text layer.
Also, many people add an expression to the position after setting the keyframes so the text will always fall exactly on a pixel value and no differences in anti-aliasing of text occur from frame to frame.
the expresssion is:
[value[0], Math.floor(value[1]}]
Sometimes this gives better results:
[value[0], Math.floor(value[1]}] + [0,0.5]
do some short test-renders with each of these tips, and decide what works best for you.
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