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camera motion in FC
Hi there,
I have a flickering problem when adding a camera motion effect on still images.
The image size is 2126 X 2136 and 300 dpi tiff format and rendered on FC set on DV PAL.
This problem seems to occur only with ‘grainy’ pictures i.e. a carpet detail: areas of the picture don’t follow the pan speed and creates a kind of moving sand effect…
What could cause this?Thanks
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9 Replies
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Damien,
Your images are too big. Knock back the dpi in Photoshop to 72 and you should see a big improvement. Any remaining artifacts can be removed with a bit of blur or a flicker filter.
Have a wonderful day.
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Thanks Chris,
Unfortunately if I reduce the dpi to 72 I will have to enlarge the image and loose quality. I have already tried the flicker filter but then again quality remains unsatisfactory.
I have also tried to set the sequence as uncompressed. Same problem…
Note that the whole film is made of stills (35mn) -
dpi has nothing to do with resolution, 1200 x 1200 at 300dpi has the same resolution as 1200 x 1200 at 72 dpi. The 72 dpi just spreads them out over a bigger area but 72 is processed at 72 dpi. Did you try a slight blur?
How are you viewing your sequence, external monitor?
You can get much smoother moves on stills by using Motion or AfterEffects.
Also may what to test out a progressive timeline.
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Thanks Chris,
I changed resolution to 72 and added slight blur but quality was very poor (even by setting sq on progressive)… The closest I could get to want I wanted was by adding a minimal filcker filter, but still not quite satisfied.
I check results on external monitor.
So far I have managed not to use either motion/After Effects but guess I’ll have to give it a go.
As I have both softwares installed which one would you recommend and why?Thanks again
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What others are saying about dpi is completely correct. Another issue I see is that you say you are working on a DV time line. DV is highly compressed. I suggest working on a DVCPro50 or even a uncompressed 8bit time line.
Because your entire video is made of still pictures, you will be able to get it done 10 times faster if you use a program like Fotomagico, that way you don’t have you don’t have to do a TON of key frames like you would in FCP.
Don’t let technology get in the way of your creativity!
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Michael,
Technically, you are correct, however, for whatever reason, FCP chokes on overly hi-rez images, others here will back me up on this, that stills should be optimized to 72 dpi at twice the frame size or so. I think that while your pixel logic is correct, what’s happening here is that file size comes into play as far as how FCP handles it. I can’t think of another reason.
I have run into this with huge files sent to me by clients which I have solved by reducing the resolution to the above specs.
BTW there is a boatload of discussion on this in the archives, one of the most debated subjects.
Have a wonderful day.
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If you have to work with very large images you have to up the still memory cache size, but as Chris says, avoid it if you don’t need an image that big. The the image only as big as you need.
All the best,
Tom
Class on Demand DVDs “Complete Training for FCP6,” “Basic Training for FCS2” and “Final Cut Express Made Easy”
Author: “Final Cut Pro 5 Editing Essentials” and “Final Cut Express 3.5 HD Editing Workshop” -
Ok now i am a complete ignorant on how to up the still memory cache size?
Also and as suggested previously, would it be a good idea to try motion rahter than FC for that kind of job?Best
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I recently edited a show with all stills. Many photos flickered when I animated them in DV format. I noticed that if I changed the sequence setting from “odd field” to “none” all the flickering went away. Hope this helps.
Bruce Wittman
Executive ProducerEagle Video Productions, Inc.
2201 Woodnell Drive
Raleigh, NC 27603-5240Website: http://www.eaglevideo.com
Email: bruce@eaglevideo.compho: 919-779-7891
cel: 919-818-5556
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