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Image Jump
Hi All,
I am hoping that someone can help me a problem that is occurring during multi-camera shoots with the HVX 200, but all 2 other JVC Cameras that I have and am using as well.
It is placed onto a tripod, turned on, and connected to the video switcher via a S-Video Cable. Everyonce in a while, whether the camera is being moved (panning or tilting), the image jumps. It is shown on the camera’s display screen, and the switcher display screens. It has been seen with both new and old S-Video cables hooked up to it and also 2 different video switchers, both old and new. It just randomly happens, and there is no way to time when it is going to happen.
I would appreciate any input that you may be able to offer.
Thanks!
Sandra -
6 Replies
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It hard to judge without seeing it, but it could be the Optical Image Stabilization. OIS is well known for this when used with a tripod and should always be tuned off unless the camera is hand held. If that is not it, please be a little more descriptive about the ‘jump’.
One more thought, I do not have much experience with live switchers, but shouldn’t all of the cameras be genlocked?
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Hi and thank-you for getting back to me!
I will go and look at the OIS to see if it is turned on or off. The “jump” looks like a wave ripple in from the bottom to top of the frame that is maybe 1 or 2 seconds in length. Once I actually put the video clip into Premiere Pro, at the spot of the jump, the video looks like is is having a band wipe effect placed on it.
Sandra
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That’s what it was! All 3 cameras had the OIS setting on. Thanks a lot! Explains why it was all 3 cameras and not just one!
Have a great day! -
Hmm, the OIS problem is the camera starts trying to stabilize a pan, but once it gets to the end of it’s range, it jumps back to the center, creating what looks like a jerky pan, so I don’t think that’s what’s going on here. Without genlock, two cameras will run out of phase and at slightly different speeds making it impossible to smoothly cut from one to the other. I don’t know how your switcher is dealing with it, but if it buffers the inputs and re-syncs them with a delay, you might be seeing what happens when they drift too far and need to re-sync. Not sure, but just a thought. Anyone else???
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Great! Ignore my last post.
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Ok, I was going to say that the problem doesn’t happen when I switch to a particular camera, just during movement. If I have any problems coming up I’ll post another topic.
Thanks again!
Sandra
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