Colorshift at DVinfo.net

Bill Scherer · January 8th, 2014, 08:55 PM

I'm working on a trailer for a independent feature I shot. Camera C100 with Ninja, editing on Premier Pro. Shot CP9

Problem, when editing together a sequence I am experiencing color shifts on some of the clips. I started out using Auto Color, experienced the shifts, then deleted that and went to Fast Color Correction but the shifts were still there. I could not get a steady color on some of the clips.

Suggestions?

Thanks

Bill

Ben Giles · January 9th, 2014, 01:55 AM

Ouch.

I'm not familiar enough with PP, but have you checked the original clips without any colour correction? ie, it's not an "auto white balance" issue?

Ben.

Bill Scherer · January 9th, 2014, 12:46 PM

No, always shoot manual. I'm now thinking that camera operator might have shifted his body and changed the light.

Seth Bloombaum · January 9th, 2014, 03:16 PM

Still, though, you need to definitively determine whether these color shifts exist in the original clips, which should be straightforward.

If they do, why? Changes in WB, changes in lighting, malfunction of the camera or Ninja? Not many other possibilities.

If they do, did you record both on the C100 and the Ninja? Shifts on both? If shifting on the Ninja but not the native footage, how bad would it be to use the C100 native files? What are the economics of reshooting vs. fixing in post? Whether money or time or both. For a short, keyframing color correction is at least possible, if unpleasant.

If these color shifts do not exist in the original clips there is a problem to be discovered in the edit/CC workflow. Find it, fix it, done!

I've only posted questions, not answers... sorry! The biggest question is "how good is good enough?" Keyframing CC is bound to leave rough edges. Heavy CC on C100 native clips may show rough edges, depending.

Steve Bleasdale · January 10th, 2014, 06:19 PM

That looks to me to be a light shift! I have had it a couple times where a person has moved or similar around the area and then the light changes slightly! Because it is a facial scene and a dialogue it shows up more and the way the light is shining on the face a interruption of light from somewhere

Bill Scherer · January 11th, 2014, 07:17 PM

Yes you could be right. I was also experimenting with film convert. I'll test everything again right out of the camera… but then in CP9 there isn't much color to look at.

January 8th, 2014, 08:55 PM	#1
Bill Scherer Regular Crew Join Date: Jun 2013 Location: Santa Cruz, California Posts: 33	Colorshift I'm working on a trailer for a independent feature I shot. Camera C100 with Ninja, editing on Premier Pro. Shot CP9 Problem, when editing together a sequence I am experiencing color shifts on some of the clips. I started out using Auto Color, experienced the shifts, then deleted that and went to Fast Color Correction but the shifts were still there. I could not get a steady color on some of the clips. Colorshift 1 on Vimeo Suggestions? Thanks Bill

January 9th, 2014, 01:55 AM	#2
Ben Giles Regular Crew Join Date: Apr 2010 Location: UK Posts: 145	Re: Colorshift Ouch. I'm not familiar enough with PP, but have you checked the original clips without any colour correction? ie, it's not an "auto white balance" issue? Ben. __________________ www.bengiles.co.uk www.matobo.co.uk

January 9th, 2014, 12:46 PM	#3
Bill Scherer Regular Crew Join Date: Jun 2013 Location: Santa Cruz, California Posts: 33	Re: Colorshift No, always shoot manual. I'm now thinking that camera operator might have shifted his body and changed the light.

January 9th, 2014, 03:16 PM	#4
Seth Bloombaum Inner Circle Join Date: Sep 2003 Location: Portland, Oregon Posts: 3,420	Re: Colorshift Still, though, you need to definitively determine whether these color shifts exist in the original clips, which should be straightforward. If they do, why? Changes in WB, changes in lighting, malfunction of the camera or Ninja? Not many other possibilities. If they do, did you record both on the C100 and the Ninja? Shifts on both? If shifting on the Ninja but not the native footage, how bad would it be to use the C100 native files? What are the economics of reshooting vs. fixing in post? Whether money or time or both. For a short, keyframing color correction is at least possible, if unpleasant. If these color shifts do not exist in the original clips there is a problem to be discovered in the edit/CC workflow. Find it, fix it, done! I've only posted questions, not answers... sorry! The biggest question is "how good is good enough?" Keyframing CC is bound to leave rough edges. Heavy CC on C100 native clips may show rough edges, depending. __________________ 30 years of pro media production. Vegas user since 1.0. Webcaster since 1997. Freelancer since 2000. College instructor since 2001.

January 10th, 2014, 06:19 PM	#5
Steve Bleasdale Trustee Join Date: May 2010 Location: England liverpool Posts: 1,343	Re: Colorshift That looks to me to be a light shift! I have had it a couple times where a person has moved or similar around the area and then the light changes slightly! Because it is a facial scene and a dialogue it shows up more and the way the light is shining on the face a interruption of light from somewhere

January 11th, 2014, 07:17 PM	#6
Bill Scherer Regular Crew Join Date: Jun 2013 Location: Santa Cruz, California Posts: 33	Re: Colorshift Yes you could be right. I was also experimenting with film convert. I'll test everything again right out of the camera… but then in CP9 there isn't much color to look at.