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Mercury Jones Credit role?

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Patrick Jaeger
Mercury Jones Credit role?
on Jan 6, 2010 at 11:05:45 am

Hey all!

I'm making a credit role but can't locate the Mercury Jones Preset. Can anyone lead me in the right direction?

Thanks!


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Steve Roberts
Re: Mercury Jones Credit role?
on Jan 6, 2010 at 12:23:24 pm

You could contact Mercury Jones -- the site is still there, but with no presets, apparently.

Have you Googled "credit roll" and "after effects"? Maybe add "flicker free"?
also:
http://mograph.net/board/index.php?showtopic=12708

By the way, did you know that a credit roll should move at at multiple of the frame rate? For 24fps, it should move at 24 pixels per second, or 48, 72 and so on.



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Patrick Jaeger
Re: Mercury Jones Credit role?
on Jan 6, 2010 at 12:38:59 pm

Ok cool I will give it a try.

Wow I didnt know that, ill have to try it. Is there a way to measure how many pixels per second?


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Dave LaRonde
Re: Mercury Jones Credit role?
on Jan 6, 2010 at 3:53:16 pm

Well, if all else fails, you could do a little arithmetic to figure it out. You know, divide the amount of change in the y position by the number of frames in the roll. Done.

It gets stickier if you have to work in 29.97, which just about everyone in NTSC-Land eventually has to do. I sidestep the issue by doing rolls at 30 fps, reimporting, and conforming the footage to 29.97. I'm lazy.

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


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Todd Kopriva
Re: Mercury Jones Credit role?
on Jan 6, 2010 at 4:15:09 pm

Does the Autoscroll-Vertical animation preset help? There's information in the "Best practices for creating text and vector graphics for video" section about vertical scrolling speed for credit rolls.

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cowcowcowcowcow
Dave LaRonde
Re: Mercury Jones Credit ROLL (jeez, spell it right!)
on Jan 6, 2010 at 7:52:14 pm

.....and, from the creator of the Mercury Jones preset, Mr. Kevin Camp himself, here is the expression he wrote that supersedes good ol' Mercury Jones:

rate = 2; //value in px/sec.
if (marker.numKeys > 0){
if (time > marker.key(1).time){
value - [0,rate*timeToFrames(time-marker.key(1).time)];
}else{
value;
}
}else{
value - [0,rate*timeToFrames(time-inPoint)];
}


just position the roll where you want it to start and it will march up the screen at the rate that you set. You should assign even-number values to the rate variable if you are rendering to an interlaced format, and if you set the rate too high the roll will appear kind of strobe-like.


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


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Patrick Jaeger
Re: Mercury Jones Credit ROLL (jeez, spell it right!)
on Jan 7, 2010 at 12:53:58 pm

Thanks guys! It worked well with minimal stuttering!


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Marco Pirletti
Re: Mercury Jones Credit ROLL (jeez, spell it right!)
on Dec 12, 2012 at 4:04:18 pm

Hey Dave!

I'm trying to use this expression with a "right to left" scrolling text on the bottom of my composition.

Any idea on how to change it from a vertical scroll?

Thanks in advance
.marco.


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