Jed Smith takes a look at creating a simple screen replacement using NUKE and in the first part of the tutorial shows how to get a track going, for a digital device that can be replaced with graphics later, by using the point tracker in NUKE rather than the Planar Tracker.
This is a set of rather lengthy video tutorials about the process of using Nuke compositing to replace the content of a cell-phone screen. I have been doing a rather huge quantity of screen replacements at work, and thought it would be useful to share the overall process, some tips, and common pitfalls to avoid
Jed notes that NUKE’s Planar tracker might not work well in this situation as there are changing reflections on the cel phone screen, as well as a finger covers the screen from time to time. Jed also shows some different approaches to tracking a digital device screen in NUKE and notes their strength and weaknesses.
Jed has also written a great post on replacing screens in NUKE at length on his site, and he discusses the topics of using a black screen, green screen, and a marker screen rounding out the video tutorials with some really great information.