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Why is the animation movement “running upward”?
Hello,
First, sorry about the highly non-scientific term. I have uploaded a 5 second preview of what my prollem is. A rectangular image is moving across the screen from left to right. As you can see, I guess they call it the tearing effect, is very severe.
You can see it on youtube here:
https://www.youtube.com/watch?v=wCCaf7vsPMcThe problem with watching it in youtube is that it doesn’t allow you to loop it. So I provided a download option to a 640k ZIP file of the movie (QT/H.264) from rapidshare (sorry don’t have my own website).
https://rapidshare.com/files/252513087/Comp3.zipIf you watch the dowloadable version and enable looping in QT, you can see that the image has this “running” effect that seem to be going from bottom to top. Also, if you loop it and watch it one after another (which you can’t do on youtube, hence you can’t see the problem well), this running is random. It doesn’t happen at the same location all the time. Sometimes it’s in the beginning, sometimes at the and, sometimes in the middle. Anyhow, I’m not sure how to get rid of this.
Currently the uploaded (and downloadable video) is 29.97fps and MOTION BLUR applied to the movement. As you can see, that doesn’t help at all.
I’ve also tried changing the Shutter Angle/Phase in the Comp Setting window. That didn’t help either.
I’ve tried to output the segment at 24 and 60fps as well (since it will be only for LCD monitor playback. The 60fps output obviously produced a much smoother motion, but this bottom to top “running” was still there – except maybe not so severely as in the 29.97fps version.
What should I do to get rid of this “running” thing?
Thanks a lot!
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4 Replies
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I’ve downloaded the clip and I’m not sure I see what you describe.
Are you referring to the stuttering on the leading and trailing edges of the animated graphic? Or is this something else?
I don’t see any “upward” motion of the graphic.
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The upward thing may be due to a slow monitor refresh rate. Have you tried playing this on another monitor?
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Yes, I’ve been reading issues about the vertical sync. I’ve installed the driver for my LCD – I’ve always thought “who needs it and why bother”, but read somewhere that it’s actually a good thing to do. Well, that didn’t solve it.
Then I tinkered with my nVidia card settings to force v-sync in AE. That didn’t help.
Then I changed the refresh rate to 59Hz as opposed to 60Hz. That didn’t help.
Then I played with any of the above mentioned settings all together. That didn’t help either.
So now that it’s Monday, I am taking it to work and see what happens there. I’ve never seen this happen so bad at my monitor so it was rather odd.
Thanks for checking it out guys!
PS: Brian, I was referring to the effect, I guess you can call it stuttering, but as opposed to going horizontally, it’s going vertically. So when you look at it, as if some pixels would being draw faster and some later. To combined effect is as if some pixels were “running” ahead gradually from bottom to top. Maybe it is refresh rate issue somehow and your monitor is set correctly that’s why you can’t see it. But I’m just guessing. Altough not really sure what to set “correctly” on an LCD monitor. Pretty much just plug it in and go.
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ok, looks like it doesn’t do it at work. so maybe something at home got screwed up. will have to investigate.
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