FORUMS: list search recent posts

Comping a shot with corrected BG

COW Forums : Adobe After Effects

<< PREVIOUS   •   FAQ   •   VIEW ALL   •   PRINT   •   NEXT >>
Jon Doughtie
Comping a shot with corrected BG
on Nov 29, 2017 at 9:01:05 pm

I know this isn't too ahrd, but haven't had to do it before, Can you help me get jump-started?

I have a lockdown shot at a front door, looking outside. The door is opened and the homeowner greets the guest.

As is often the case the shot is exposed for the guest and the (daytime) BG is blown out. But they also shot an empty lockdown correctly exposed for the exterior.

Is this gonna be old fashioned manual rotoscope? Or can I leverage some tools to simply/speed up processing these two elements into one correctly exposed video clip?

System:
Dell Precision T7600 (x2)
Win 7 64-bit
32GB RAM
Adobe CC 2017.1 (as of 8/2017)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from UHD MP4, HD MP4, and HD P2 MXF.


Return to posts index

Dave LaRonde
Re: Comping a shot with corrected BG
on Nov 29, 2017 at 9:08:02 pm

You might be able to use Rotobrush, but I fear iffy results. How bad is the light wrap on the subject?

If at all possible, I'd re-shoot with a chroma key background, then remove it for the shot with the properly-exposed exterior.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


Return to posts index

Jon Doughtie
Re: Comping a shot with corrected BG
on Nov 29, 2017 at 9:16:02 pm

Light wrap isn't bad - the subject was also under cover on the porch. I'll play around with the rotobrush.

System:
Dell Precision T7600 (x2)
Win 7 64-bit
32GB RAM
Adobe CC 2017.1 (as of 8/2017)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from UHD MP4, HD MP4, and HD P2 MXF.


Return to posts index


Dave LaRonde
Re: Comping a shot with corrected BG
on Nov 30, 2017 at 12:46:39 am

Words to the wise -- look at Rotobrush tutorials. Using the tool is not even close to being intuitive.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


Return to posts index

Jon Doughtie
Re: Comping a shot with corrected BG
on Nov 30, 2017 at 9:00:10 pm

I am with you on that. I can actually get a look on the shot I am very happy with.

For 22 frames. Then the roto simply stops. And I am back to the over-exposed BG.

Why is it rendering only 22 frames? The whole shot is only three seconds.

I'm getting a little brain-fried trying to figure out what I have missed.

First rough, without spending any real time on it. For a three second shot, I can clean it up and live with it. But I do want all three seconds!



System:
Dell Precision T7600 (x2)
Win 7 64-bit
32GB RAM
Adobe CC 2017.1 (as of 8/2017)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from UHD MP4, HD MP4, and HD P2 MXF.


Return to posts index

Dave LaRonde
Re: Comping a shot with corrected BG
on Nov 30, 2017 at 10:42:28 pm

Yeah, I could live with that, too. I've only used Rotobrush for like a half-second of video, however.

But I recall a way to save what you've done so far -- sort of like a keyframe in the Rotobrush window -- and proceed with more. Sadly, like you, I'd have to look it up.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


Return to posts index

<< PREVIOUS   •   VIEW ALL   •   PRINT   •   NEXT >>
© 2018 CreativeCOW.net All Rights Reserved
[TOP]