Video Noise.. Need help a.s.a.p at DVinfo.net

Michael Chen · July 24th, 2004, 11:01 AM

Hi all,

I've just rented a DVX100, we do not have the manual and we had to shoot rite away once we got it.

To my horror, whenever we tune down the aperture, or when there's not enough light, video noise starts occuring on the whole video.

Its as if auto gain is set on. But I've set it off in the menu system.

I've encountered this prob in XL1s, coz we accidentally turn on the auto gain last time. So I suspect the auto gain is on.
Is it hidden somewhere?
I've selected AGC as off in the menu. Anything that I am missing?

Need help a.s.a.p as we are shooting again in a few hours.

thanks a lot for the help!

Stefan Scherperel · July 24th, 2004, 12:06 PM

make sure that you do not have the gain switch on as well. It is located next to the WB button under the lens assembly.

Michael Chen · July 24th, 2004, 04:58 PM

I have set it to L (low).

The problem is I do not seem to see any difference even when I set it to H (high)..

Thats really weird.
Anyone has any idea?

Tung Bui · July 25th, 2004, 09:17 AM

What settings do you have your camera set on? In cine v you will get alot of grain in the blacks/dark greens and dark blue EVEN when the light level are good. Use a different setting. This is a problem that is inherent with this camera that other users have noticed too.
Also white balance all the time as this camera's auto white balance is apalling.

Michael Chen · July 26th, 2004, 10:43 AM

I dont think that we've set the camera at cinema mode.

We are shooting on normal 60i, all settings, gamma etc are on normal settings.

What could be causing the video noise?
Any other users who has any idea?

Stefan Scherperel · July 26th, 2004, 10:59 AM

could you post a screen grab. That might help to figure out whats going on. Better yet, if you could post a short clip that would be even better.

Ron Evans · July 26th, 2004, 06:02 PM

You need to go to the menu setup for the gain controls. The values for the switch setting are set in this menu setup to anything you want so could be very high even for the L setting. If you have full info in the LCD monitor it will display th gain values as you switch. I suggest you go to the gain setup menu and set L to 0 . Use the little toggle to get the menu and move around to the gain setup menu. The manual for the DVX is on the Panasonic site also.

Ron Evans

Michael Chen · July 29th, 2004, 05:05 AM

Hi,

I've posted some frame grab here.

http://photos.yahoo.com/yco_lee

I've checked previously , and set the gain as 0.

It only has the option to modify the mid and high gain. The low gain is always at zero gain if i am not mistaken.

Could the camera be faulty?

Ron Evans · July 29th, 2004, 05:47 AM

Yes I have just checked the manual and low is always 0 on the DVX100 I was getting confused with the Ag DVC200 since I rent both at different times. Another thing to check is the detailing to see if it is set too high.

Ron

Michael Chen · July 29th, 2004, 11:16 AM

I cant find the detail option.
Can you point me to where it is?

But the noise looks like some kind of gain.

I hope it can be solved by altering the detail option.
Any other potential causes to it?

Just to confirm, how do i determine if I am shooting on full manual mode?

Ron Evans · July 29th, 2004, 02:59 PM

You should go to the Panasonic.com site and download the operating instructions. http://catalog2.panasonic.com/webapp/wcs/stores/servlet/ModelDetail?displayTab=O&storeId=11201&catalogId=13051&itemId=68668&catGroupId=14571&modelNo=AG-DVX100A&surfModel=AG-DVX100A

The detail settings are part of the scene file menu.

If you are in auto an A appears in the viewfinder.

Ron Evans

Michael Chen · August 2nd, 2004, 08:30 PM

Thanks for the info.
Setting the detail level to -7 helps.

Barry Green · August 2nd, 2004, 11:10 PM

Try using normal matrix instead of cine-matrix, and normal or high gamma instead of cinegamma, and see if those improve your noise situation...

July 24th, 2004, 11:01 AM	#1
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	Video Noise.. Need help a.s.a.p Hi all, I've just rented a DVX100, we do not have the manual and we had to shoot rite away once we got it. To my horror, whenever we tune down the aperture, or when there's not enough light, video noise starts occuring on the whole video. Its as if auto gain is set on. But I've set it off in the menu system. I've encountered this prob in XL1s, coz we accidentally turn on the auto gain last time. So I suspect the auto gain is on. Is it hidden somewhere? I've selected AGC as off in the menu. Anything that I am missing? Need help a.s.a.p as we are shooting again in a few hours. thanks a lot for the help!

July 24th, 2004, 12:06 PM	#2
Stefan Scherperel Major Player Join Date: Dec 2003 Location: Seattle WA Posts: 209	make sure that you do not have the gain switch on as well. It is located next to the WB button under the lens assembly.

July 24th, 2004, 04:58 PM	#3
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	I have set it to L (low). The problem is I do not seem to see any difference even when I set it to H (high).. Thats really weird. Anyone has any idea?

July 25th, 2004, 09:17 AM	#4
Tung Bui Regular Crew Join Date: Dec 2002 Location: Sydney, Australia Posts: 101	What settings do you have your camera set on? In cine v you will get alot of grain in the blacks/dark greens and dark blue EVEN when the light level are good. Use a different setting. This is a problem that is inherent with this camera that other users have noticed too. Also white balance all the time as this camera's auto white balance is apalling.

July 26th, 2004, 10:43 AM	#5
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	I dont think that we've set the camera at cinema mode. We are shooting on normal 60i, all settings, gamma etc are on normal settings. What could be causing the video noise? Any other users who has any idea?

July 26th, 2004, 10:59 AM	#6
Stefan Scherperel Major Player Join Date: Dec 2003 Location: Seattle WA Posts: 209	could you post a screen grab. That might help to figure out whats going on. Better yet, if you could post a short clip that would be even better.

July 26th, 2004, 06:02 PM	#7
Ron Evans Inner Circle Join Date: Mar 2003 Location: Ottawa, Ontario, Canada Posts: 4,222	You need to go to the menu setup for the gain controls. The values for the switch setting are set in this menu setup to anything you want so could be very high even for the L setting. If you have full info in the LCD monitor it will display th gain values as you switch. I suggest you go to the gain setup menu and set L to 0 . Use the little toggle to get the menu and move around to the gain setup menu. The manual for the DVX is on the Panasonic site also. Ron Evans

July 29th, 2004, 05:05 AM	#8
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	Hi, I've posted some frame grab here. http://photos.yahoo.com/yco_lee I've checked previously , and set the gain as 0. It only has the option to modify the mid and high gain. The low gain is always at zero gain if i am not mistaken. Could the camera be faulty?

July 29th, 2004, 05:47 AM	#9
Ron Evans Inner Circle Join Date: Mar 2003 Location: Ottawa, Ontario, Canada Posts: 4,222	Yes I have just checked the manual and low is always 0 on the DVX100 I was getting confused with the Ag DVC200 since I rent both at different times. Another thing to check is the detailing to see if it is set too high. Ron

July 29th, 2004, 11:16 AM	#10
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	I cant find the detail option. Can you point me to where it is? But the noise looks like some kind of gain. I hope it can be solved by altering the detail option. Any other potential causes to it? Just to confirm, how do i determine if I am shooting on full manual mode?

July 29th, 2004, 02:59 PM	#11
Ron Evans Inner Circle Join Date: Mar 2003 Location: Ottawa, Ontario, Canada Posts: 4,222	You should go to the Panasonic.com site and download the operating instructions. http://catalog2.panasonic.com/webapp/wcs/stores/servlet/ModelDetail?displayTab=O&storeId=11201&catalogId=13051&itemId=68668&catGroupId=14571&modelNo=AG-DVX100A&surfModel=AG-DVX100A The detail settings are part of the scene file menu. If you are in auto an A appears in the viewfinder. Ron Evans

August 2nd, 2004, 08:30 PM	#12
Michael Chen Regular Crew Join Date: Apr 2002 Location: Singapore Posts: 163	Thanks for the info. Setting the detail level to -7 helps.

August 2nd, 2004, 11:10 PM	#13
Barry Green Barry Wan Kenobi Join Date: Jul 2003 Location: North Carolina Posts: 3,863	Try using normal matrix instead of cine-matrix, and normal or high gamma instead of cinegamma, and see if those improve your noise situation...