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Mercury Jones Flicker free Roll
Hi,
I have been using the MJ Flicker free credit roll, but I can’t seem to be able to make it longer and smoother. On a 1 min timeline it all resolves in 30 sec. I have read the instructions on the expression but when I place a keyframe at the end or one at the end and one at the beginning it still goes within the 30 sec. The instruction said that the flicker fx will recalculate but for some reason I can get it to.Thanks
Paolo
FCP 5.1.4 – PowerMac 2.2 Dual – 4.5 Gb Ram
1Tb G-Raid2 – 2 1Tb Lacies- CUBASE SX3 -
2 Replies
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since the preset will force movement to be only whole pixels (or even pixels if field friendly is checked) to ensure smooth looking movement, you can’t get precise roll durations…
try making you comp longer, like 2 min, then pull the end keyframe out further. that should start slowing down the movement.
can you determine how many pixels per frame the credit list is moving? i’ve found that you want the pixel movement per frame to be less than 1% of the comp height… so for ntsc sd (480) that’s between 1-4 pixels per frame…
the preset was originally designed to make it easy to generate flicker free movement, and was originally very simple, but after reworking the expression to give it starting and ending position control and a few other things, I have had several people get confused by the lack of precise ending control… the end keyframe for the most part provides the end position data (the actual ending y position), the timing is primarily determined by the length (height) of the credit list, the time of the end key frame just sets the maximum duration of the move… example, if the second key frame is set at 2 min, the credit roll will finish within 2 min, but that could be 1:10 depending on the length of the list…
here is a simple expression that will allow you to enter the movement per frame manually:
n = 2; // value in pixels per frame, use even numbers if rendering with fields.
a = 1/thisComp.frameDuration;
y = time*a*n;
value-[0,y]paste that into the position expression field and set the start position for the roll, no key frames necessary, but you may need to adjust the length of the comp to fit the roll in. also, remember that the ‘n’ value should be less than 1% of the comp height and an even number if rendering with fields…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Thank you Kevin!
I am very creative but I get lost in the math of it all.
See I was placing a keyframe in the position, not in the expression, I couldn’t.
I don’t know how to tell the movement of it…meaning the pixels.
I am gonna try all of your suggestions!Thanks!!!
Paolo
FCP 5.1.4 – PowerMac 2.2 Dual – 4.5 Gb Ram
1Tb G-Raid2 – 2 1Tb Lacies- CUBASE SX3
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