Filmmaker Help Files
We've are compositing in rec709 as opposed to the default no-color space in AE, and when we switched to 709, it seems to be quite a bit brighter in gamma and offset.

Something we discovered is that not all Rec709 profiles are created the same - some have a technically wrong gamma. This includes Rec709 profiles that ship with Adobe products.

Read more: Correct Rec709 Profile

QUESTION: Why doesn't Rec709 have a specific gamma?

Rec709 has always specified a gamma, it is shown here:

Read more: Rec709 Gamma

QUESTION: Which would give the best colors? Shooting aRGB or sRGB? And what bit depth should I use in After Effects?

First off, I'd like to mention that there is no such thing as aRGB. There is sRGB, and there is AdobeRGB, but Adobe RGB should never be written as aRGB.

Read more: AdobeRGB vs sRGB

QUESTION: We have shot a movie on RED and are adding some VFX to the shots in After effects. I've read I have to interprete my Raw footage to LOG, right? To sell the composite effect, the added effects have to have the same log-look my material has now, right? Do I need a color profile? What about this checkbox at the DPX-settings "logarithmic conversion"? What is this about?

With Red or film footage it is preferable to work in 32 bit linear for all compositing. You do not want to work in "LOG" space**. 

Read more: RED, LOG Space, and After Effects

I want to address a common misconception. Some people shooting video or JPG with dSLRs claim:

If you are going to shoot JPG or video on a DSLR then shoot in Adobe RGB 98 because it is a wider color space. You can always switch to sRGB later and it will throw out the extra data

This is, quite frankly, WRONG. Being a “wider” colorspace does not make it a “better” colorspace. Especially when dealing with 8 bit file formats.

Read more: dSLRs and Colorspace

QUESTION: I need to take footage of a subject against a pitch black background and create a luma matte from this. If I mess with the levels, I will always end up with a thin black line around whatever I am transferring into the finished matte. 

To answer the question you asked, use a matte choker, such as "Simple Choker", plus blur, and if needed, masks. Mocha can be very helpful here.

Read more: Black Screen and Gamma Blur

QUESTION: I’m doing a spoof of the Wizard of Oz, the scene in which the Wicked Witch sends off her flying monkeys. This will be done completely on (green/blue/magenta?) screen and the environment composited in post. The Witch's face is green, and the monkey's faces are blue and there is red on their suits. I need to figure out what color screen I should use.

Read more: Green on Green

Advertisement from Google AdSense

Help | Legal | Contact Us

Copyright © 2012-2018. All Rights Reserved.