Banding? at DVinfo.net

Steven D. Martin · February 1st, 2008, 07:25 PM

I got my EX1 yesterday and took it out for a spin today. I shot some time-lapse footage of clouds against a church steeple. When I got the SxS card out and viewed the footage in the computer, the two time-lapse shots showed significant banding.

The photo attached was produced by importing the clip into Apple Color, but it is an accurate representation of the clip as viewed through FCP and Quicktime. The clip was shot at 720P24, 35 VBR.

Has anyone else encountered this? Is this banding found on all clips, or is this an artifact of the high-or-low speed recording?

Eric Pascarelli · February 1st, 2008, 07:26 PM

I think it was found to be an issue with time lapse - there's another thread discussing it.

Paul Joy · February 1st, 2008, 07:43 PM

Yes, I saw this problem too using 1 fps with S&Q Motion. Try using the Frame Record function instead, it produces better results at 1 fps.

Michael H. Stevens · February 1st, 2008, 08:58 PM

Having got this great camera there really is absolutely no point whatsoever to shoot 720p nor 24p unless you are printing to film. Try again with 1080x30p. Also choose the right gamma - one that compresses rather than splits to highlights. I have not tried this yet but the examples I've seen of speeded up clouds have been fantastic.

Paul Cronin · February 2nd, 2008, 07:21 AM

Steven I have had this problem when there is not enough light. With proper exposure it seems to work great.

Michael I agree I use 1080P while shooting time laps and 720p 30/60 for slow motion.

Paul Joy · February 2nd, 2008, 12:22 PM

Quote:

Originally Posted by Michael H. Stevens

Having got this great camera there really is absolutely no point whatsoever to shoot 720p nor 24p unless you are printing to film. Try again with 1080x30p. Also choose the right gamma - one that compresses rather than splits to highlights. I have not tried this yet but the examples I've seen of speeded up clouds have been fantastic.

I disagree, I prefer to shoot at 720p as it allows me to use overcranking without having to change modes. My output does not need to be 1080p so I do not need the extra resolution.

I also don't think this problem has anything to do with gamma settings, it happens at 1 fps but not 5, so something else is happening here.

Steven D. Martin · February 2nd, 2008, 12:58 PM

Quote:

Originally Posted by Paul Joy

I disagree, I prefer to shoot at 720p as it allows me to use overcranking without having to change modes. My output does not need to be 1080p so I do not need the extra resolution.

I's gonna say-

The reason I was shooting at 720P was 'cuz I could easily overcrank it. I bought the EX1 because of the native 1080P but am finding that the other advantages of the camera are so amazing that I'm getting my money's worth at 720P!

I'm at the beginning of the experimentation stage with this camera and have a long way to go before I find the right look. But- it's disconcerting to discover that one of the coolest things about the camera produces such horrible artifacts.

Am I hearing that the banding disappears at slightly higher frame rates?

February 1st, 2008, 07:25 PM	#1
Steven D. Martin Regular Crew Join Date: Nov 2005 Location: Oak Ridge, TN Posts: 72	Banding? I got my EX1 yesterday and took it out for a spin today. I shot some time-lapse footage of clouds against a church steeple. When I got the SxS card out and viewed the footage in the computer, the two time-lapse shots showed significant banding. The photo attached was produced by importing the clip into Apple Color, but it is an accurate representation of the clip as viewed through FCP and Quicktime. The clip was shot at 720P24, 35 VBR. Has anyone else encountered this? Is this banding found on all clips, or is this an artifact of the high-or-low speed recording? Attached Thumbnails

February 1st, 2008, 07:43 PM	#3
Paul Joy Major Player Join Date: Mar 2007 Location: Norfolk, UK Posts: 627	Yes, I saw this problem too using 1 fps with S&Q Motion. Try using the Frame Record function instead, it produces better results at 1 fps. __________________ Blog: www.pauljoy.com Company: www.videotrader.co.uk

February 2nd, 2008, 07:21 AM	#5
Paul Cronin Inner Circle Join Date: Dec 2005 Location: Rhode Island Posts: 4,048	Steven I have had this problem when there is not enough light. With proper exposure it seems to work great. Michael I agree I use 1080P while shooting time laps and 720p 30/60 for slow motion. __________________ Paul Cronin www.paulcroninstudios.com Last edited by Paul Cronin; February 2nd, 2008 at 10:12 AM. Reason: correction on timelaps

February 1st, 2008, 07:26 PM	#2
Eric Pascarelli Major Player Join Date: Nov 2007 Location: Los Angeles, CA Posts: 498	I think it was found to be an issue with time lapse - there's another thread discussing it.

February 1st, 2008, 08:58 PM	#4
Michael H. Stevens Major Player Join Date: Sep 2007 Location: Palm Desert, California Posts: 311	Having got this great camera there really is absolutely no point whatsoever to shoot 720p nor 24p unless you are printing to film. Try again with 1080x30p. Also choose the right gamma - one that compresses rather than splits to highlights. I have not tried this yet but the examples I've seen of speeded up clouds have been fantastic.