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View Full Version : Is there a fix for CMOS rolling shutter issue


GuyS
09-18-2009, 05:07 PM
Recently I have been shooting HD video using a Sony TG1 camera through the windscreen of an airplane. The camera has a CMOS type sensor. I believe I have the "rolling shutter" issue exaggerated by the prop. I have shot video using other CCD cameras and after adjusting the shutter speed, don't even see the prop.
The artifacts I am getting do not seem like a too fast of a shutter speed (which captures the prop at certain points of the rotation). There is probably no cure for the rolling shutter issue but I thought I would take a chance and see if anyone had an idea how to fix (or avoid) it.

SRsupport
09-18-2009, 05:17 PM
Yes a ccd camcorder is the best fix as you already know. :)

STORMDAVE
09-18-2009, 09:27 PM
Very expensive and time consuming...but can be done.

http://www.thefoundry.co.uk/pkg_overview.aspx?ui=47C4AB50-4636-4326-87D1-FB380B2119EF

I hate CMOS on camcorders.

The best way to avoid it is to use steadycam, dollies, cranes or tripods. Do not do fast pans with the camera. When there are many vertical objects around, make sure to not move the camera too much.

GuyS
09-19-2009, 12:25 AM
Thanks StormDave. Wow $500 you're right, pretty expensive for that software. The great thing about my TG1 is it's size. It mounts on top of my instrument panel without obstructing too much of my field of vision, plus it does a pretty good job of HD. Unfortunately there are not any other options since all the other small HD cameras have gone to CMOS...that I am aware of.

STORMDAVE
09-19-2009, 12:42 AM
CMOS will always have this problem.

You might want to take a look at Panasonic's line of DVCPROHD cameras (Not the HPX300). They use CCD's instead.

CMOS is cheaper to produce and uses less energy, plus it let's you have more resolution compared to CCD's.

Maybe in 2-5 years we'll see CMOS camcorders not have this rolling shutter issue.

GrassValley_KH
09-19-2009, 01:04 AM
This isn't really EDIUS related...

THoff
09-19-2009, 01:16 AM
Keeping things somewhat on topic, the Thompson Infinity cameras use CMOS sensors with a readout method that avoids the common CMOS Jello(tm) effect...

STORMDAVE
09-19-2009, 01:17 AM
Keeping things somewhat on topic, the Thompson Infinity cameras use CMOS sensors with a readout method that avoids the common CMOS Jello(tm) effect...

I've seen the jello effect on some of the infinity footage I've worked on before. It only happens on rapid movements, though.

But other than that, it's a great camera. Fantastic looking footage.

SRsupport
09-19-2009, 11:43 AM
I also have seen fantastic footage from the infinity.
The j2k support in Edius is nice.