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-   -   F3 Nissan Spot - Discolored Seat Belts (IR Issue?) (https://www.dvinfo.net/forum/sony-xdcam-pmw-f3-cinealta/496350-f3-nissan-spot-discolored-seat-belts-ir-issue.html)

Aaron Newsome May 25th, 2011 11:49 AM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
1 Attachment(s)
I took a stab at it just to see what it would look like. Spent about 3 minutes on it. Used a color replace node in Shake. Didn't look too bad really. Would definitely need some fine tuning to look real though.

Leonard Levy May 25th, 2011 11:51 AM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
It should be noted that while this particular shot looks quite correctable because the color is pretty isolated, its often much harder if not impossible.

Philipp Eierund May 25th, 2011 11:58 AM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Aaron Newsome (Post 1652786)
I took a stab at it just to see what it would look like. Spent about 3 minutes on it. Used a color replace node in Shake. Didn't look too bad really. Would definitely need some fine tuning to look real though.

Aaron, doesn't look bad but you can definitively tell how the color is falling apart. I think this will be more apparent during a moving shot as well.

I tried a 'color replace' in After Effects and it was pretty bad. Maybe After Effects isn't the best place to do this? Post was planning on using AE and Magic Bullet for color correction. Wish we could go to a third party with a Resolve, but not sure the agency has that budgeted for this project.

I'd love to post a rough cut for you guys to watch but I think that may get me in trouble. ;)

Peter Moretti May 25th, 2011 01:30 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Leonard Levy (Post 1652788)
It should be noted that while this particular shot looks quite correctable because the color is pretty isolated, its often much harder if not impossible.

Absoultely! Esp. if the color range also shows up in something like the talent's skin tone.

Andrew Stone May 25th, 2011 02:09 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
And if you are using a program like Apple Color or Blackmagic (Davinci) Resolve doing an object color change is quite easy to do. Take a few seconds once you know how to do it.

Brian Drysdale May 25th, 2011 03:46 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Although best avoided in the first place if possible, all this messing around in post costs time and therefore money. Even worse if you're on a tight schedule and have a large volume of shots needing correction.

Nate Weaver May 25th, 2011 03:54 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Andrew Stone (Post 1652836)
And if you are using a program like Apple Color or Blackmagic (Davinci) Resolve doing an object color change is quite easy to do. Take a few seconds once you know how to do it.

I was avoiding coming in here and spouting how trivial a fix it is in a good color correction program, but it's pretty dang easy.

Sooting it right in the first place is step 1, but when it's already done, it's not a big deal if the job is already getting a color pass.

Dean Harrington May 25th, 2011 04:21 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Philipp Eierund (Post 1652762)
I'll have to run some tests soon. This is a nasty problem and Nissan is certainly not going to accept red seat belts. ;)

Dean, any pointers in correcting this issue in post?

Thanks!

go to Utube and type in changing color in apple color. There are tutorials that show you how to do this.

Aaron Newsome May 25th, 2011 04:33 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Philipp Eierund (Post 1652791)
Aaron, doesn't look bad but you can definitively tell how the color is falling apart. I think this will be more apparent during a moving shot as well.

I tried a 'color replace' in After Effects and it was pretty bad. Maybe After Effects isn't the best place to do this? Post was planning on using AE and Magic Bullet for color correction. Wish we could go to a third party with a Resolve, but not sure the agency has that budgeted for this project.

I'd love to post a rough cut for you guys to watch but I think that may get me in trouble. ;)

I actually spent a little more time on it after I took the screen shot. I used the picker to select the seat color as the replacement color. It looked much better and seriously looked passable. Wouldn't matter if it were a moving shot, the color is fairly well isolated and I've also masked the color replacement to only apply to the belts. Just animate the mask shape/location and it could follow the move of the shot easily.

But yes, you guys are all correct,... much easier to get it right in the camera before it's recorded.

Dean Harrington May 25th, 2011 07:11 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Philipp Eierund (Post 1652762)
I'll have to run some tests soon. This is a nasty problem and Nissan is certainly not going to accept red seat belts. ;)

Dean, any pointers in correcting this issue in post?

Thanks!

Quote:

Originally Posted by Leonard Levy (Post 1652788)
It should be noted that while this particular shot looks quite correctable because the color is pretty isolated, its often much harder if not impossible.

quite right on the isolation ... imagine a presentation where the rostrum is wood red/brown and a moving speaker in black (showing far red contamination) under tungsten with a strong red signal ... nightmare!
I've had to do this and I don't ever want to have to do this again. Getting it right with something like a tiffen IR T1 filter is a better proposition.

Steve Kalle May 27th, 2011 03:25 PM

Re: F3 Nissan Spot - Discolored Seat Belts (IR Issue?)
 
Quote:

Originally Posted by Nate Weaver (Post 1652858)
I was avoiding coming in here and spouting how trivial a fix it is in a good color correction program, but it's pretty dang easy.

Shooting it right in the first place is step 1, but when it's already done, it's not a big deal if the job is already getting a color pass.

I totally agree and have fixed this within AE but I can't recall exactly how I did it. I will try to find it or duplicate it and let you know.

Since your people have AE, they also have Mocha which will track the shapes perfectly if you need masking.


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