EX1R CMOS Flashes at DVinfo.net

David B. Monier-Williams · October 28th, 2009, 05:58 PM

Specifically how does Sony correct the frames affected by either lightning or flash photos?

Graeme Fullick · October 29th, 2009, 12:23 AM

It does automatically, what I have been doing manually - brightens the dull half of the frame up to match the bright half - meaning there is equal brightness across the whole frame. I have just tried it with my EX1 and it works very well. It just looks like the normal flash frame that you see on a CCD based camera.

Alister Chapman · October 29th, 2009, 03:46 AM

That's not the way it appears to work from my experience. In the case of interlace it appears to replace the affected part of the field with the same part of the other field which is normally unaffected. With progressive it appears to use previous and following frames to build a new frame. What I have seen in my tests of a Beta of the new clip browser is that in many cases the flash bands are removed completely leaving a frame with no trace of a flash.

Graeme Fullick · October 29th, 2009, 03:54 AM

Alister,

I am using it right now to do some corrections and the frame that is produced is definitely the lighter flash frame - which makes the fixed frame appear like a normal flash. I am still experimenting, but have not tried the manual fix as yet - which I see does allow you to select which field of an interlaced frame that you wish to "fix". In any case the results are pretty good - not perfect, but hardly noticeable at 25 frames a second. It is certainly a lot quicker than doing it manually in your NLE.

Having said that I am still trying to get the fixed footage into Media Composer. It looks great in Clip Browser, but doesn't seem to export as the fixed mxf file. Probably just my inexperience, but I will report back if I can't solve it.

Nick Wilson · October 29th, 2009, 03:58 AM

Graham

Just noticed in Preferences that there is an option for where the corrected clip is saved. It may be that you are just importing the original.

N

Graeme Fullick · October 29th, 2009, 04:18 AM

Thanks for the tip Nick - I will check it out - I am sure that you are correct!

Edit - found the export settings, I was exporting correct clip - still coming up as a split frame in MC - very strange - looks great in Clip Browser.

Matt Davis · October 29th, 2009, 04:18 AM

Is this using a new version of XDCAM Transfer, or Clip Browser?

I assume this is with the latter, and that there's some conversion involved.

So, the software senses where there's a frame with a big divide on exposure, and clamps the hi-lo-mid of the flashed portion and applies that to the unflashed portion of a frame. Yes?

Tom Hardwick · October 30th, 2009, 02:12 AM

This is indeed good news (and thank you David for raising the subject). I'd really like to see some before and after frames if anyone can help. Also what happens in overcranked footage, progressive footage, slow shutter speed footage when electronic flashes have gone off?

But most of my stuff is run 'n' gun, and my slo-mo has to be done in post when I can take the time to choose when and where, what sine wave to employ and so on. The CMOS ½ and ¾ frame over-exposure doesn't bother me too much in 'normal footage' (though I'd rather it wasn't there of course), but it sure has forced my edit when I'd have liked to slo-mo that bit.

tom.

Paul Kellett · October 30th, 2009, 04:41 AM

I wish clip browser could play the mxf files after conversion, i use vlc player to play mxf files but it's buggy, keep crashing and won't let me jump to different sections of a clip.
What do other people use to view mxf files ?

Paul.

Paul Kellett · October 30th, 2009, 05:45 AM

Problem solved, got this sony mxf player, much better.

https://servicesplus.us.sony.biz/son...l-PDZVX10.aspx

Paul.

October 28th, 2009, 05:58 PM	#1
David B. Monier-Williams New Boot Join Date: May 2008 Location: Scottsdale Arizona Posts: 13	EX1R CMOS Flashes Specifically how does Sony correct the frames affected by either lightning or flash photos?

October 29th, 2009, 12:23 AM	#2
Graeme Fullick Major Player Join Date: Mar 2005 Location: Newcastle, Australia Posts: 337	It does automatically, what I have been doing manually - brightens the dull half of the frame up to match the bright half - meaning there is equal brightness across the whole frame. I have just tried it with my EX1 and it works very well. It just looks like the normal flash frame that you see on a CCD based camera. __________________ Graeme

October 29th, 2009, 03:46 AM	#3
Alister Chapman Inner Circle Join Date: Dec 2005 Location: Bracknell, Berkshire, UK Posts: 4,957	That's not the way it appears to work from my experience. In the case of interlace it appears to replace the affected part of the field with the same part of the other field which is normally unaffected. With progressive it appears to use previous and following frames to build a new frame. What I have seen in my tests of a Beta of the new clip browser is that in many cases the flash bands are removed completely leaving a frame with no trace of a flash. __________________ Alister Chapman, Film-Maker/Stormchaser http://www.xdcam-user.com/alisters-blog/ My XDCAM site and blog. http://www.hurricane-rig.com

October 29th, 2009, 03:54 AM	#4
Graeme Fullick Major Player Join Date: Mar 2005 Location: Newcastle, Australia Posts: 337	Alister, I am using it right now to do some corrections and the frame that is produced is definitely the lighter flash frame - which makes the fixed frame appear like a normal flash. I am still experimenting, but have not tried the manual fix as yet - which I see does allow you to select which field of an interlaced frame that you wish to "fix". In any case the results are pretty good - not perfect, but hardly noticeable at 25 frames a second. It is certainly a lot quicker than doing it manually in your NLE. Having said that I am still trying to get the fixed footage into Media Composer. It looks great in Clip Browser, but doesn't seem to export as the fixed mxf file. Probably just my inexperience, but I will report back if I can't solve it. __________________ Graeme

October 29th, 2009, 04:18 AM	#6
Graeme Fullick Major Player Join Date: Mar 2005 Location: Newcastle, Australia Posts: 337	Thanks for the tip Nick - I will check it out - I am sure that you are correct! Edit - found the export settings, I was exporting correct clip - still coming up as a split frame in MC - very strange - looks great in Clip Browser. __________________ Graeme

October 29th, 2009, 03:58 AM	#5
Nick Wilson Major Player Join Date: Dec 2007 Location: Northampton, UK Posts: 259	Graham Just noticed in Preferences that there is an option for where the corrected clip is saved. It may be that you are just importing the original. N

October 29th, 2009, 04:18 AM	#7
Matt Davis Trustee Join Date: Aug 2005 Location: Berkshire, UK Posts: 1,562	Is this using a new version of XDCAM Transfer, or Clip Browser? I assume this is with the latter, and that there's some conversion involved. So, the software senses where there's a frame with a big divide on exposure, and clamps the hi-lo-mid of the flashed portion and applies that to the unflashed portion of a frame. Yes? __________________ Director/Editor - MDMA Ltd: Write, Shoot, Edit, Publish - mattdavis.pro EX1 x2, C100 --> FCPX & PPro6

October 30th, 2009, 02:12 AM	#8
Tom Hardwick Inner Circle Join Date: Mar 2003 Location: Billericay, England UK Posts: 4,711	This is indeed good news (and thank you David for raising the subject). I'd really like to see some before and after frames if anyone can help. Also what happens in overcranked footage, progressive footage, slow shutter speed footage when electronic flashes have gone off? But most of my stuff is run 'n' gun, and my slo-mo has to be done in post when I can take the time to choose when and where, what sine wave to employ and so on. The CMOS ½ and ¾ frame over-exposure doesn't bother me too much in 'normal footage' (though I'd rather it wasn't there of course), but it sure has forced my edit when I'd have liked to slo-mo that bit. tom.

October 30th, 2009, 04:41 AM	#9
Paul Kellett Trustee Join Date: Nov 2007 Location: Bristol UK Posts: 1,273	I wish clip browser could play the mxf files after conversion, i use vlc player to play mxf files but it's buggy, keep crashing and won't let me jump to different sections of a clip. What do other people use to view mxf files ? Paul. __________________ Round 2 GH5,FZ2000

October 30th, 2009, 05:45 AM	#10
Paul Kellett Trustee Join Date: Nov 2007 Location: Bristol UK Posts: 1,273	Problem solved, got this sony mxf player, much better. https://servicesplus.us.sony.biz/son...l-PDZVX10.aspx Paul. __________________ Round 2 GH5,FZ2000