Is this CMOS rolling shutter? at DVinfo.net

Markus Klatt · February 14th, 2010, 04:09 PM

Yesterday I filmed *as always* I fireworks display. I know of the rolling shutter effect of the EX1, but never had real problems with it.

Yesterday was 0°C. And as you can see in this short test, at any flash, or even any bright light, there is a horizontal cut approx. at the top quarter of the picture, always at the same place. This happened even, when I controlled the lense with a flashlight afterwards.

I am worried that this is not normal, maybe caused by the 0°C and humid air, I don't know.

Any hints, for this, please?
I could not check, if its "gone" now, but I will check do tomorrow.

/* edit - problem solved, tired operator or magic, but its gone */

Brian Rhodes · February 14th, 2010, 05:34 PM

Markus what are the settings on your cam? I try to never to go above 6 on the gain settings.

Serena Steuart · February 14th, 2010, 05:49 PM

I see no sign of that effect in the posted clip. Sure you've linked the correct video?

David Chapman · February 14th, 2010, 05:56 PM

It looks like rolling shutter to me. You may want to control your shutter manually, though.

Dave Morrison · February 14th, 2010, 07:49 PM

I couldn't see any banding either. Wrong file linked to?

Jeff Kellam · February 14th, 2010, 09:06 PM

Rolling shutter wouldn't show on my 24" screen at all and I watched in 1080P fullscreen. There is massive block noise and fringing, but that's the compression.

I was also suprised at the large monochromatic and chromatic aberations that lens has. If you look at that tower on the left in the distance as well as the buildings, they are visibly leaning over at pretty severe angles.

The fireworks look okay. Im sure the uncompressed file looks great.

Vincent Oliver · February 15th, 2010, 12:25 AM

Ditto............. I can't see any problem. Maybe your NLE is producing a proxy version, once rendered it appears to be OK

Markus Klatt · February 15th, 2010, 04:35 AM

Thanks for all your input!

/* edit */
I cannot believe. Yesterday it was that obvious, the native footage, the rendered footage, the rendered footage uploaded to YouTube - all this showed the flickering in the top quarter. I tested on two different PCs and even checked today in office.
But now, there is nothing left, nowhere. I cannot believe.

Maybe I should sleep more than 5 hours a day, I don't know. It was that visible...

My deepest excuse for steeling your time for nothing!
Next time I will wait one day before asking.

Unbelievable, really.

Uli Mors · February 15th, 2010, 10:00 AM

oh yes, there is rolling shutter banding effect , for example 0:44 and later (when flashes get more heavy).

a) on some fireworks, banding doesnt show so much since there is no single flash but dozens, so the effect is not that intrusive

b) have you tried the new banding correction in the EX clip browser software?

Kind regards

ULi

Ian Planchon · February 15th, 2010, 11:56 AM

I didnt really notice any problems either. I would say its not the cold temps though, I have had my ex3 in -35 with no problems at all.

February 14th, 2010, 04:09 PM	#1
Markus Klatt Regular Crew Join Date: Jul 2004 Location: Berlin, Germany Posts: 169	Is this CMOS rolling shutter? Yesterday I filmed as always I fireworks display. I know of the rolling shutter effect of the EX1, but never had real problems with it. Yesterday was 0°C. And as you can see in this short test, at any flash, or even any bright light, there is a horizontal cut approx. at the top quarter of the picture, always at the same place. This happened even, when I controlled the lense with a flashlight afterwards. I am worried that this is not normal, maybe caused by the 0°C and humid air, I don't know. Any hints, for this, please? I could not check, if its "gone" now, but I will check do tomorrow. / edit - problem solved, tired operator or magic, but its gone / Last edited by Markus Klatt; February 15th, 2010 at 01:04 PM.

February 14th, 2010, 05:56 PM	#4
David Chapman Major Player Join Date: Mar 2006 Location: Dallas, TX Posts: 346	It looks like rolling shutter to me. You may want to control your shutter manually, though. __________________ David Chapman www.davechapfilms.com

February 14th, 2010, 07:49 PM	#5
Dave Morrison Major Player Join Date: May 2002 Location: West Central Florida Posts: 762	I couldn't see any banding either. Wrong file linked to? __________________ EX1, Nikon D750 http://www.morrisonphotographics.com http://www.heritagefilm.com

February 14th, 2010, 09:06 PM	#6
Jeff Kellam Major Player Join Date: Sep 2006 Location: Virginia Beach, VA Posts: 656	Rolling shutter wouldn't show on my 24" screen at all and I watched in 1080P fullscreen. There is massive block noise and fringing, but that's the compression. I was also suprised at the large monochromatic and chromatic aberations that lens has. If you look at that tower on the left in the distance as well as the buildings, they are visibly leaning over at pretty severe angles. The fireworks look okay. Im sure the uncompressed file looks great. __________________ Panasonic HMC150/Canon A1/JVC HD1/Sony Vegas 8.0c

February 15th, 2010, 12:25 AM	#7
Vincent Oliver Trustee Join Date: Sep 2004 Location: Chislehurst, London Posts: 1,724	Ditto............. I can't see any problem. Maybe your NLE is producing a proxy version, once rendered it appears to be OK __________________ Eyes are a deaf man’s ears. Ears are a blind man’s eyes

February 14th, 2010, 05:34 PM	#2
Brian Rhodes Major Player Join Date: Nov 2005 Location: Houston, Texas Posts: 753	Markus what are the settings on your cam? I try to never to go above 6 on the gain settings.

February 14th, 2010, 05:49 PM	#3
Serena Steuart Major Player Join Date: Jun 2006 Location: Studio Alnitak, Melbourne, Victoria, Australia Posts: 640 Images: 3	I see no sign of that effect in the posted clip. Sure you've linked the correct video?

February 15th, 2010, 04:35 AM	#8
Markus Klatt Regular Crew Join Date: Jul 2004 Location: Berlin, Germany Posts: 169	Thanks for all your input! /* edit / I cannot believe. Yesterday it was that obvious, the native footage, the rendered footage, the rendered footage uploaded to YouTube - all this showed the flickering in the top quarter. I tested on two different PCs and even checked today in office. But now, there is nothing left, nowhere. I cannot believe. Maybe I should sleep more than 5 hours a day, I don't know. It was that visible... My deepest excuse for steeling your time for nothing! Next time I will wait one day before asking. Unbelievable, really. Last edited by Markus Klatt; February 15th, 2010 at 01:09 PM.*

February 15th, 2010, 10:00 AM	#9
Uli Mors Major Player Join Date: May 2006 Location: Germany Posts: 565	oh yes, there is rolling shutter banding effect , for example 0:44 and later (when flashes get more heavy). a) on some fireworks, banding doesnt show so much since there is no single flash but dozens, so the effect is not that intrusive b) have you tried the new banding correction in the EX clip browser software? Kind regards ULi

February 15th, 2010, 11:56 AM	#10
Ian Planchon Major Player Join Date: Nov 2007 Location: an Alaskan living in Des Moines, Iowa Posts: 513	I didnt really notice any problems either. I would say its not the cold temps though, I have had my ex3 in -35 with no problems at all.