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Another Jitter/Judder Thread – What are the best practices?
Hi guys,
If you’ll indulge me: I’ve spent most of the day reading everything on here about judder in rendered output and still have some questions.
I’m doing some motion graphics in AE CS4 with still images and text moving horizontally across the screen and projecting it on a 22′ screen with a Christie DW6K connected via DVI to a Mac.
Other videos shown on this set up look nice and smooth, but mine has the dreaded jitter & stutter.
Of course, I compared the smooth videos with mine and matched their settings, but the content is so different I’m not sure that was the right thing to do.
So here’s my question; since I’m creating this from stills and text rendered entirely in AE what is the “right” or best case settings for output?
Currently I am doing this:
1280 x 720, 23.976, Animation, square pixels -> Final Cut -> Motion JpegA, Medium quality.1280 x 720p is the native resolution of the projector.
Thanks for any insight you have to offer, guys, and please ask questions if I left out a vital piece of information.
Cheers! -
4 Replies
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If you watch a feature film and pay attention to the horizontal motion (especially in a lower-budget movie) you will notice that there’s a bit of judder in it. 24fps is not the best frame rate for smooth motion. Experienced cinematographers know how to shoot a sideways pan to avoid excessive amounts of judder and experienced motion graphic artists know how to adjust the speed of their animation to do the same.
A certain level of judder is acceptable, since it’s there in everything in that medium anyway. The audience is used to it. You just need to minimize it so that it’s not distracting. Usually that’s done with a bit of motion blur and/or adjusting the speed of things as Dave said.
– The Great Szalam
(The ‘Great’ stands for ‘Not So Great, in fact, Extremely Humble’)No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.
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Dave,
Thanks for the reply. I responded a day or two ago, but it seems to be stuck in moderation.
First of all, the important thing to note is: that is a homebrewed robust porter. Good eye.
The frame rate for all the clips involved is 23.976 – the others are live action. I’ve tried rendering out 23.976, 24, 29.97, 59.94, 60 and even changing the animation to move vertically instead of horizontally and I still see the stuttering and jitter.
The projector is connected via DVI @ 1280×720, 60hz.
If there is an ideal speed for motion graphics how to do I find it?
Thanks guys,
Charlie -
Thanks for the replies, guys. I must be rendering incorrectly. If you get a chance, I’ve uploaded a group of very simple test renders at different frame rates & field settings:
https://wortomatic.com/documents/rendertests/Every one of them stutters. Can you tell what I’m doing wrong?
Thanks again,
Charlie -
Dave,
Thanks for taking the time to check those tests out. I guess I’m expecting too much from my 2006 MacPro1,1 and ATI Radeon 9800. Through the projector those all look horrifically jittery. For some reason it never occurred to me that the hardware couldn’t keep up.
I’ll see Charlie P. next month at GABF in Denver and I’ll be sure to let him know he is quoted not only in the homebrewing world, but also in the realm of compositing and motion graphics. 🙂
Cheers,
Charlie
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