I recorded two scenes (same place and framing, only the people in it differ) that I need to join. I am making masks to show the two persons at the same time, but the colors are slightly different and it's very distracting.
Here is a photo of a frame that shows it: http://imgur.com/I2R3K
I tried changing exposure, curves, levels, brightness, contrast, saturation, but frankly I just have no experience with this so I feel like I am shooting at the dark.
Anyone knows a simple way of dealing with that?
Here's one way: Apply the Exposure effect and change the dropdown from "Master" to "Individual Channels" in order to adjust the channels separately. Press "Option/Alt+1" to match the red channel by adjusting just the red channel parameters in the Exposure effect panel. Then "Option/Alt+2" to match the green channel and "Option/Alt+3" to match the blue channel. It's easier to match the grayscale values this way. To get back to the regular image just use the same key combination twice.