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Smooth credit roll — not yet! Expression not working.
I’m trying to do a smooth credit roll in AE. Having done my homework I know I need to advance artwork at whole numbers of pixels per frame.
I’m rendering at 1920x1080HD 25fps. Used the expression found on numerous threads including this one to generate whole number pixel shifts per frame.
t = time;
fr = t/thisComp.frameDuration;
x = value [0];
s = 4; //Speed in pixels per frame[x, fr*s]
I’m aware there are other expression but they all purport to do same thing — move at whole number pixel interviews — so haven’t tried many others (one I found didn’t work).
I’m not using Text Layers in AE (if that is making any difference to the AA). I generated the text and images in InDesign and exported as a PDF. Imported PDF into AE. Have tried a few whole number values for s including 4 and still getting judder.
Generated to H264 and Apple Pro Res codecs doesn’t seem to make much difference to judder.
Here is link to my AE project with PDF. Here is link to output as H264 (40MB).
Also included a Quartz Composer file (if anybody is interested) where I created the same whole number pixel movement as AE but rendering it out in Quartz Crystal I get different judder but no better. Quartz Composer previews in real time and Quartz Crystal renders same project that took some 16min+ in AE in about 30 seconds. But no smoother output — even when applying AA and Motion Blur at render time.
If it doesn’t get any better than this in AE any suggestions for alternative software. Might be forced to re-set all the type in FCP and then comp logos in image scroll over top in AE — good grief! if I can get joy from AE.
Can anyone recommend a video encoder where I can down-sample say a 75 fps render to 25 fps with frame blending? Does Apple’s Compressor do frame blending? What about some other app that I can get this out smoothly from. I have FCP installed but have never done a title in it either.
Since my Dell only has 60Hz at full native res (2560×1440) I set it to 1080p and selected 50Hz to see if that effected anything but it makes absolutely no difference to playback smoothness.
This has been cross-posted at Adobe forums but got no response in over 24 hrs and need to solve pronto.
Thanks in advance 🙂
AE CS6
OS X 10.7.5
AMD Radeon HD 6750M 1024 MB -
2 Replies
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Your download doesn’t have the pdf in it so it’s hard to see what’s going on. I think I would let AE calculate the frame for me like this:
fr = timeToFrames(time);
s = 6;
value – [0,fr*s]Dan
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PDF file link here
I imported the artwork into Motion and got better results, not perfect but considerably better especially at slower speeds.
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