Intermittent brightness flicker in 5D2 videos

mrmarks · 8th of October 2011 (Sat)

I still see some intermittent brightness flickering (slight but noticeable) in my videos although I have disabled the following:

Auto lighting optimizer
Peripheral correction
Highlight tone priority
High ISO noise reduction
Long exposure noise reduction
AWB

I'm in manual mode. Is there anything else that I'm missing? Looking more closely at the flicker that I'm seeing, it seems to occur in the shadow areas when I pan the camera to a scene which has lower average brightness. Feels like the Automatic Lighting Optimizer is still working although it has been disabled. Maybe it is only disabled for jpeg but not movies? Thanks for the inputs

LiberationFrequency · 8th of October 2011 (Sat)

Are you using a variable aperture lens?

mrmarks · 8th of October 2011 (Sat)

Yes, it's the 24-105 f4 IS on manual focus and IS on.

ChasWG · 8th of October 2011 (Sat)

That lens is a constant aperture lens with it's largest opening being set at f4, but if you zoom in to a tighter framing, the f stop doesn't change like some cheaper lenses.

I would also turn off the IS and see if that doesn't help you out.

mrmarks · 8th of October 2011 (Sat)

It's happening in natural lighting as well. So it's nothing to do with the lighting. My firmware is current 2.0.9. Lens used is 24-105 f4 IS and does not matter if IS is on or off. I've tried prime lenses such as 50f1.2 and 85f1.2 and the problem is still there.

mrmarks · 9th of October 2011 (Sun)

Guys, I think I found the problem. It was the wmp media player. When I played the files using Quicktime, they were perfectly fine. I guess wmp does some kind of brightness adjustment.

ChasWG · 9th of October 2011 (Sun)

Excellent! That's an easy fix.

LiberationFrequency · 9th of October 2011 (Sun)

Quote:

Originally Posted by mrmarks

Guys, I think I found the problem. It was the wmp media player. When I played the files using Quicktime, they were perfectly fine. I guess wmp does some kind of brightness adjustment.

Its probably the other way around, but quicktime player is just better for playing quicktime files.

Quicktime files have gamma shift issues (midrange tones) once in a while and maybe WMP wasn't reading the files right, causing the issue. Regardless, good to hear its fixed.

8th of October 2011 (Sat)	#1
mrmarks Member Join Date: Jan 2010 Posts: 774	Intermittent brightness flicker in 5D2 videos I still see some intermittent brightness flickering (slight but noticeable) in my videos although I have disabled the following: Auto lighting optimizer Peripheral correction Highlight tone priority High ISO noise reduction Long exposure noise reduction AWB I'm in manual mode. Is there anything else that I'm missing? Looking more closely at the flicker that I'm seeing, it seems to occur in the shadow areas when I pan the camera to a scene which has lower average brightness. Feels like the Automatic Lighting Optimizer is still working although it has been disabled. Maybe it is only disabled for jpeg but not movies? Thanks for the inputs

8th of October 2011 (Sat)	#2
LiberationFrequency Senior Member Join Date: Jun 2010 Location: Montreal, QC Posts: 1,313 IMAGE EDITING OK	Re: Intermittent brightness flicker in 5D2 videos Are you using a variable aperture lens?

8th of October 2011 (Sat)	#3
mrmarks Member Join Date: Jan 2010 Posts: 774	Re: Intermittent brightness flicker in 5D2 videos Yes, it's the 24-105 f4 IS on manual focus and IS on.

8th of October 2011 (Sat)	#4
ChasWG Goldmember Join Date: Aug 2009 Location: Aurora, CO Posts: 3,638 IMAGE EDITING OK	Re: Intermittent brightness flicker in 5D2 videos That lens is a constant aperture lens with it's largest opening being set at f4, but if you zoom in to a tighter framing, the f stop doesn't change like some cheaper lenses. I would also turn off the IS and see if that doesn't help you out. __________________ *Chas Gordon* 7D Gripped/40D Gripped/10-24/EF24-70 f2.8L/EF70-200 f4L/EF50 f1.8 Mk I/EF85 f1.8 *http://www.flickr.com/photos/chaswg/* *http://vimeo.com/user9461302/videos*

8th of October 2011 (Sat)	#5
mrmarks Member Join Date: Jan 2010 Posts: 774	Re: Intermittent brightness flicker in 5D2 videos It's happening in natural lighting as well. So it's nothing to do with the lighting. My firmware is current 2.0.9. Lens used is 24-105 f4 IS and does not matter if IS is on or off. I've tried prime lenses such as 50f1.2 and 85f1.2 and the problem is still there.

9th of October 2011 (Sun)	#6
mrmarks Member Join Date: Jan 2010 Posts: 774	Re: Intermittent brightness flicker in 5D2 videos Guys, I think I found the problem. It was the wmp media player. When I played the files using Quicktime, they were perfectly fine. I guess wmp does some kind of brightness adjustment.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
30D intermittent CF ERROR	ikolpdog	Canon EOS Digital Cameras	3	13th of December 2010 (Mon) 12:42
LG televisions: Why wouldn't Canon's 1080p videos work if 720p videos do?	C2S	Digital Video	14	22nd of February 2010 (Mon) 13:17
5d Intermittent red dot in images	Pollyanna	Canon EOS Digital Cameras	12	25th of August 2009 (Tue) 11:01
Intermittent Err_99	Wrench	Canon EF and EF-S Lenses	21	22nd of January 2006 (Sun) 12:10
problems with picture brightness vs. LCD brightness	dilla	General Photography Talk	2	24th of September 2004 (Fri) 19:44