read everything about rolling credits, and still …

[Darby Edelen]

Well, something that always helps for any interlacing issues at all is Reduce Interlace Flicker under Effect > Blur & Sharpen. I usually use a value below 0.5

[Shark_time]

yeah, i’ve tried using reduce interlace flicker, but it’s not helping much. any other ideas? it looks terrible!

[Darby Edelen]

I don’t have a sure fire way to fix the problem you’re experiencing, but I did change the expression you were using slightly to automatically determine the correct speed based on the composition’s frame rate. This should give you similar results to what you already had, only hopefully more accurate. Change the first value of s to alter the speed at which the text scrolls (1 is 1 pixel per frame, 2 is 2 pixels, etc.):

s = 2;
s = Math.ceil(s) * (1 / thisComp.frameDuration);
tempX = transform.position[0];
tempY = transform.position[1];

tempY = transform.position[1] – ((time – inPoint) * s);

[tempX, tempY]

[Shark_time]

i’ll give it a shot. thanks!

[Alexxx]

The fact you mention the stutter happens at different points makes me think it’s a playback issue and not render. That is a hefty frame size so I would try a few things. Render it out as AVI as well and see if another play has the same problem. Also, render out 200pixel wide version of it (same height) and see if that plays smoothly, just to see if it’s a data bottleneck with the frame size in the player.

What is your final delivery medium? TV, PC, Cinema?

Alex
Lightdrop Video Production, Editing & Design

[Shark_time]

i tried rendering out a 200px wide version, the motion is still jerky. i’m delivering for HDTV. i’ve been exporting some half res and quarter res samples which when played in quicktime have the jerky motion. but if i import that footage back into after effects it looks better, stutters less, but not perfect. the movies also look better if i play them with quicktime player on my powerbook, but still not perfect.

my client wants a faster credit roll, but after all of this experimentation i haven’t been able to get credits moving at 239.76px that don’t look awful. that’s with reduce interlace flicker, gaussian blur, fast blur, motion blur, each by itself, in different combinations, etc. so i guess i’m stuck with 119.88px speed, as it looks better, but still not right.

maybe it will look fine when my editor brings the footage into final cut? i’ve read everything about this and i understand it less than when i started!

[Mike]

There’s no way to use Quicktime as your QC monitor. The way that video can appear in a Quicktime window can vary depending on many things and if you are in fact interlacing, Quicktime will never be able to properly display your scroll. You definitely are going to need to look at the scroll on an HD monitor to see if there’s any problem at all. You might find that everything is perfect when output properly so get this movie loaded into Final Cut ASAP and check it out! Good luck!

[-stev=o]

Have you tried applying this expression to the position parameter?

[Math.round(position[0]),Math.round(position[1])]

It’ll ensure that your position changes will occur in whole pixel increments only.

-stev=o

[Ronaldo Montalvo]

“It’ll ensure that your position changes will occur in whole pixel increments only.”

i’m not sure that’s a help. a good cg roll needs to use sub-pixel motion to appear smooth i think.

[-stev=o]

Don’t knock it ’till you’ve tried it.
😀

-stev=o