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HELP!! – horizontal moving strap jitter…..
Hi all,
Hopefully someone can hlep me in the next hour or so!?!
I’ve got several logos on a strap, moving tickertape-style horizontally across screen over 10 seconds. Granted, they are moving pretty quick (each logo takes approx 2secs to go across screen) but I am getting either really bad jitter, or heavy blurred logos if I use motion blur.
I’ve tried mo blur on/off, rendering progressive, or with fields and no joy.
Are there any tricks to sort this, or is AE just no very good at moves like this? I’m quite surprised, cos you’d think it’s a fairly standard thing in motion gfx! Our editor usually does this on the Editbox, but he’s tied up so I’m on it..
Any thoughts guys?
Thanks.
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10 Replies
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Search the COW for “judder”.
It’s an optical phenomenon, best relieved by rendering with fields.
The app has nothing to do with it.
I’ve seen it on big-budget cinema commercials, on pans across a set. Judder.
It’s because the eye actually is able to see the separate images since the motion is regular and easy to predict. In my opinion.
Mess up the motion, distract the eye, render fields or live with it. Most clients do, actually. Your eye is just too good. 😉
Blurring just makes blurry stills.My 2 cents,
Steve -
Thanks Steve.
Yeah, I appreciate why it’s doing it..but when you do it via DVE in Editbox, or on our linear suite using clio DVE it looks fine?!?
rendering fields has indeed garnered the best result…but it’s a long way off looking any good! Bah!
I’m sure I’ve had a similar issue with scrolling credits (vertically) in AE before. We tried it in DVE in one of the suites and it looked fine. Did I read somewhere that AE isn’t too great for crawls and scrolls? Can’t for the life of me remember where I read it..Hmm…
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UPDATE: I just tried a similar move in Premiere’s DVE and it looks fine!
Go figure..
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Are both renders interlaced, and are you viewing both the same way (on a broadcast monitor)?
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Yep and yep. Bizarre isn’t it! The interlaced (uff) AE render was the best result I could get from AE, though was heavily blurred. And the DVE in Premiere was interlaced AFAIK…just standard position keyframes in Prem.
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Hmm … I need to revise my usual advice on this matter. Is there any way you could let me see a couple of seconds of each render?
(if you can, send any link info to ads at reidroberts daht calm )
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Sent…thanks Steve.
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Steve and Jimmybee – have you had any more progress on this? I have noticed it before, but right now a client is really bothered by it and will NOT accept that ‘this is just the way it happens’ – scientific explanation or not… normally the client either doesn’t notice or doesn’t care, but not this one! Please, any more info you may have found (steve from looking at the samples, maybe?) would bea big help. Thanks!
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Scott and James,
I’ve added the two test clips (one from James’ AE, one from James’ Premiere) and RAM preview’ed them on a broadcast monitor. Both run smoothly, running at 50i PAL. So it looks as if AE and Premiere can both do smooth and interlaced.
But of course, it looks like video.
(a side note: the AE one looks a bit softer — not sure why, maybe JB can shed some light thereon)Scott, if you could, you might want to show your client the various ways of rendering and viewing on a broadcast monitor:
– progressive, no blur
– progressive, blur
– interlaced, blur
– interlaced, no blur
– same variations, but with non-straight-line motion. This might not be an option.… then ask him/her to choose. The smoothest would be interlaced, and I don’t think the blur would make much difference, but that’s me.
Hope that helps,
Steve -
Hi Scott,
Yeah – don’t know what happened with my original AE file. It was smooth when interlaced, but horizontally blurred and ghosted the logos that were moving. I’ve re-animated it exactly the same and rendered it fine loads of times since. I can’t seem to receate it! both Steve and I are stumped.
I did read something interesting yesterday though about making sure the movement from frame to frame was exact whole pixel values over time, this might help. I will try it aswell when I get a mo. The guy asking was on about rendering progressive, so this may fix that video look aswell?….
https://forums.creativecow.net/readpost/2/902963?
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