This is a FLIR Duo Rainbow IR video of the Pittsburgh International Race Complex Full track during Qualifying. The camera is mounted in my LH side pod aimed right at the front left tire.
I've wanted to do an infrared overlay since I started running my FE. It took several years for used FLIR Duos to get below $700, but mine only lasted 5 sessions max. I only have two full sessions of video, but I don't make qualifying videos so I put this on it's own. I did learn that I was under filling my tires by about 2 psi. Hence the cold strip down the middle. This session I started adding more, but was still maybe 1psi short.
You can see when the brake calipers come into view or when hot exhaust from a car ahead is shown because my tire temps show a dramatic drop in temperature. Essentially, that is the camera recalibrating the color code for the much hotter temps. When those hot items disappear the normal tire temps show up again.
There is a false hot spot towards the middle of the image. I believe it is the heat of the camera reflecting off of the outer Germanium lens. Once the tire gets hot that tends to show up more than the hot spot.