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Tight deadline question about creating a seamless loop

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Mike MacKenzieTight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:34:36 pm

Hey everyone...

This seems really basic, I'm almost embarrassed to ask, but I cannot seem to figure it out and it's driving me crazy (and on a tight deadline).

I need to create a seamless loop of a horizontal pan across a row of diagonal lines--looks like this: //////////////. I just want them to travel from left to right over two minutes, and be seamlessly loopable.

I've mainly tried doing this with position keyframes, trying to get the first and last to line up properly, but I cannot make it happen seamlessly. Any help greatly appreciated!

Motion Graphics Designer / Art Director
Boston, MA

System:
Mac/Leopard
2 x 2.8 GHz Quad-Core Intel Xeon
10 GB 800 MHz DDR2 FB-DIMM


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Walter SoykaRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:41:30 pm

[Mike MacKenzie] "I've mainly tried doing this with position keyframes, trying to get the first and last to line up properly, but I cannot make it happen seamlessly."

That's your problem -- if the first frame and last frame match precisely, then you'll get a little stutter in the loop. You want the frame AFTER the last frame to match the first frame, so that the end leads back to the beginning.

Does that make sense?

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Mike MacKenzieRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:50:32 pm

Thanks, but no, I understand that aspect. I think the problem lies with it being diagonal...I cannot get the lines to line up properly when they recycle.

Motion Graphics Designer / Art Director
Boston, MA

System:
Mac/Leopard
2 x 2.8 GHz Quad-Core Intel Xeon
10 GB 800 MHz DDR2 FB-DIMM


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Walter SoykaRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:56:45 pm

Whether the lines are diagonal or not shouldn't affect their loopability; the image just needs to have an end state that leads back to the initial state.

Can you post a screen shot to help us visualize your problem?

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Dave LaRondeRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:45:56 pm

If you're doing this on a text layer, try this:
  • Make a comp the same size as your text layer.
  • Nest this comp in your main comp.
  • Apply the Offset effect, and RAM Preview
  • Tweak the nested comp -- probably its horizontal dimension -- and the text layer within it until it loops nicely on a RAM Preview.
  • In the project window, highlight the nested comp, and go to the Interpret footage window
  • In the interpret Footage window, specify how many times it should loop.

It's an Oldie but a Goodie, and it oughta do the trick.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Mike MacKenzieRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 7:56:28 pm

Thanks but I don't think that will work for me either. It's not a text layer, and I cannot get two-minute ram previews.

Motion Graphics Designer / Art Director
Boston, MA

System:
Mac/Leopard
2 x 2.8 GHz Quad-Core Intel Xeon
10 GB 800 MHz DDR2 FB-DIMM


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Brian CharlesRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 8:03:18 pm

What about using the Offset Effect to animate?



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Dave LaRondeRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 8:12:18 pm

Yeah, I think that's a good bet, too, but I think I steered the guy wrong by suggesting he use a text layer in a nested comp.

The comp could contain anything that's 1) long enough on the horizontal dimension and 2) loops at a given point in time after applying Offset.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Mike MacKenzieRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 8:26:42 pm

I figured it out, based on your suggestion (not exactly what you said but it pointed me in the right direction).
Thanks everyone!

Motion Graphics Designer / Art Director
Boston, MA

System:
Mac/Leopard
2 x 2.8 GHz Quad-Core Intel Xeon
10 GB 800 MHz DDR2 FB-DIMM


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Walter SoykaRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 8:28:30 pm

One potential downside to using Offset for building loops -- it doesn't work with the built-in motion blur. Any motion blur must be faked.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog - What I'm thinking when my workstation's thinking
Creative Cow Forum Host: Live & Stage Events


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Mato KokoticRe: Tight deadline question about creating a seamless loop
by on Apr 18, 2011 at 9:27:55 pm

Why not use text layer in nested comp?
Bunch of non-serif IIIIs, scale font verticaly and horizontaly. Instead of Offset simply keyframe position (you can even add motion blur if prefered), nest it and rotate in master comp.

Downside is that you cannot do loop with Interpret Footage on nested comp (or can?), so i added simple expression.

AE CS5 project:

2212_linescrawl.aep.zip



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