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Sony XDCAM EX Pro Handhelds
Sony PMW-300, PXW-X200, PXW-X180 (back to EX3 & EX1) recording to SxS flash memory.


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Old May 13th, 2008, 01:02 PM   #1
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S&Q image jerky

When shooting in variable frame rates (ie 60fps) on the EX1 the image on the screen looks jerky/stuttered, any idea why? When in 720/60P it's normal.
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Steve
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Old May 13th, 2008, 01:08 PM   #2
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What screen?
Variable 720p24/60 or something else?
What time base timeline?

I shot Tennis lessons at 720p30/60 the other day and it's smooth as silk. Client was blown away at how nice the slow mo looks compared to video slowed in the timeline.
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Old May 13th, 2008, 01:43 PM   #3
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On the camera LCD, shot 720 24/60. But when set to 720/60 it's smooth.Any ideas Craig?
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Old May 13th, 2008, 01:58 PM   #4
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If you're looking at on camera LCD it's best to check after recording since you're not seeing the motion at 24/60.

Shutter angle/shutter speed can have an impact of course. Fast shutter speeds (smaller angles) can result in that jerky "Saving Private Ryan" look.

For 720p24/60 I shoot at 1/120 or 180 (same thing at that frame rate).
BTW the advantage of using angle for this is that if you go back to straight p24 at 180 it's than at 1/48. If you use "fractional" setting you have to remember to change from 1/48 to 1/120 as you change back and forth from 24 to 24/60 (overcrank).
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Old May 13th, 2008, 02:04 PM   #5
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It is nice that the EX1 has the 180 degree angle, it's like the "half" setting on Varicam, really surprised to see it on a lower-priced cam. I just leave it on 180 degree. When you say you're not seeing the image at 24/60 on the LCD what do you mean? I thought that was exactly what you were seeing.
Steve
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Old May 13th, 2008, 02:19 PM   #6
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Are you using frame accumulation as well? It might cause the problem as well if the frame rates of accumulation and slow mo dont match up. A bit far fetched but thought I'd mention.

Sami
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Old May 13th, 2008, 02:38 PM   #7
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Well, while you're recording you're not seeing things in slow mo on the LCD of course.

I'm not a fan of 24p in general. Fast camera pans would certainly look jerky. Of course that really means the DP should be following the camera motion rules (pans and such) for 24p.

I don't carry a monitor with me in the field. What I do, if the shoot demands it, I do a "test" recording in the field and check on a 46" 1080p monitor back at my studio. I load that data on to my Mac, use Transfer Tool to rewrap as .mov and play DVI to HDMI cable to the monitor straight.

Quote:
Originally Posted by Steve Phillipps View Post
It is nice that the EX1 has the 180 degree angle, it's like the "half" setting on Varicam, really surprised to see it on a lower-priced cam. I just leave it on 180 degree. When you say you're not seeing the image at 24/60 on the LCD what do you mean? I thought that was exactly what you were seeing.
Steve
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