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Another “jumpy” problem..
We’ve got an animation where a lot of corp logos travel by on a band of white over a rotating globe. Here’s a link to the clip…
http://www.doyoustream.com/logo_band/
Notice the jumpiness? I’ve searched here and found several similar occurrences, and I’ve been checking for the past couple of hours to see if mine could be caused by any of the noted possibilities in other posts.
My comp’s settings are 720 x 480. I can render out an AVI or Targa sequence either interlaced (lower first) or progressive – bring it into Avid Xpress Pro to play on a broadcast monitor, or into Procoder to make a WMV, or Sorenson Squeeze for the Flash you just watched – they all have that same jumpiness. I’m beginning to think that displays just can’t handle dark graphics on a stark white background moving by at that speed. We’ve slowed it down until the jumpiness disappears, but then it takes about 2 minutes for the whole thing to go by.
I’d love to be told that I’m missing something here.
Steve Brame
DoYouStream.com -
3 Replies
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took a class from chris meyer once and he mentioned that different comp sizes and frame rates required different scroll and roll speeds to avoid jumpiness caused by the relationship between the speed, distance, and frame rate. IOW HD requires different speeds than DV because it’s farther across the frame and 25 fps requires different speeds than 30, etc…. He urged all in the audience to hit up their clients for additional charges for doing the same basic design for different formats because, to make them work, you have to do more than just resize the project
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Well…
it can’t at a low framerate. You know it’s just like playing Doom in 1996: the motion was jerky because it was too fast in relation to the framerate.
The fact that the framerate of a webmovie isn’t exactly linked to the atomic clock doesn’t help either 😉
Also, our eyes are not used to seeing anything move that fast without motion blur.
Actually the jumpiness is exactly that perception: “hey, it’s jumping, not smearing” and we notice.So slow down, up the framerate (or use fields for video, but that’s not the case here), add motion blur.
Any or all of the above. -
After reading this, I went pack and took another look. If you focus intently on one of the logos as it travels across, there is no jumpiness. So it’s just a perception thing related to the speed/framerate.
Steve Brame
DoYouStream.com
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