He recorded the GoPro footage using Protune and CamRaw settings. Because this wedding was outdoors the white balance was actually decent. No problem there. As I pointed out in my previous postings, the CamRaw setting is very desaturated. It's not going to immediately match with anything on a Canon SLR. Also Clarence was using my calibrated rec.709 custom picture style on the Canon, so I had to match it to that color profile.
Here's the long and short of it...I needed to to a quick and dirty color calibration with the GoPro footage. I started out by using a "Fast Color Corrector" effect and setting the saturation to 200%. This got me in the ballpark; not perfect, but in the ballpark. Then I used the "Channel Mixer" effect with the following matrix...
[ 0.77 0.04 0.16] [R-gpro] [R-rec709]
[-0.09 1.15 -0.08] x [G-gpro] = [G-rec709]
[ 0.15 0.14 0.67] [B-gpro] [B-rec709]
You may want to look at my previous post to see how to apply these numbers into the Channel Mixer. The color matched up reasonably well. Not perfect, but we weren't going for perfect. We were going for not having a noticeable difference when cutting between cameras. At least I got dinner at a nice restaurant out of the deal.
I know, I know...where are the pictures. Can't post them. It's not my footage.