PDA

View Full Version : weird recording glitch, re: skipped frames



telephone line
05-19-2008, 09:41 AM
i posted this in the 'technical' forum. want to give it a shot here b/c its killing me... LITERALLY killing me. im dying. help.

Hi. This is my first post here, I tried searching this problem but didn't find much that was close to this one I'm having:

Recently purchased an HVX200, noticed a couple times while shooting in 720PN/24p a quick flicker in the LCD, like a frame was skipped. I'm mentioning this now because obviously it is not an importing issue if I see it while recording.
When I import the footage to FCP, the raw clip seems to be missing a frame. Just like if you were editing a long clip and removed 1 frame from the clip, that is what happens. Also it looks like during that frame if you moved the entire frame to the left or right.
It's very noticeable to me and really annoying since I just bought this camera. Anyone else having this problem?
I've been shooting mostly in 720PN/24p and only noticed it SO FAR in this format.

Filmbuff28
05-19-2008, 09:58 AM
Turn off your OIS (Optical Image Stabilizer). You said that the whole frame jumps to the left or right sometimes.

I'm going to guess that this is happening on slow to medium pans, tilts and even locked down shots. It happens sometimes because the OIS gets confused and predicts a movement for which it needs to correct and stabilize. So turn off the stabilizer and use it for handheld stuff.

Let me know if that was the problem. A way to check if it is skipping a frame is to check timecode in the camera. Basically play a suspected bad clip from the P2 card in camera frame by frame and watch what happens. you could also do this on a computer since its all digital anyway.

And if you watch the frame shift right or left in 1 or 2 frames then settle back to center in 1-3 frames it is your OIS.

I hope its just your OIS and not something else. Let us know if that's it.

JP

telephone line
05-19-2008, 10:53 AM
i was hoping it had something to do with the OIS. Of course I already formatted the cards that I shot the footage with, but looking at the clip in FCP, the timecode doesn't jump. The more I look at it, it is more of a 'entire frame moves to the left/right' and stays there more than 'a frame missing.'

Of course when I want it to happen it doesnt, I just spent 15 minutes recording clips my street with slow pans/tilts and NO GLITCH. I'll keep my OIS off from now on and keep you posted...

thanks!

Barry_Green
05-19-2008, 11:30 AM
This sounds exactly like the OIS thing. Definitely always have OIS *off* when using a tripod.

Justyn
05-19-2008, 04:54 PM
I learned this a while back too.. can be hard to detect on the LCD.. and easy to forget it's on..