Us there a chroma key video program out there for Linux. I want it to be able to stream video feed live with a chroma key effect going. I plan to do some interviews and presentation through Skype and want to make programs like LibreOffice Impress appear in the background (for presentations I want the powerpoint presentation in the background). Plus image views and PDF viewer. And if possible maybe the web browser, and Google earth (some programs as a lark to amaze my friends). I checked the repositories and it only has a program that does it after you finished filming. I want one that does it live.

I am also looking for a windows program but this is a Linux forum, If someone has an idea fell free to let me know, this question is optional.

Might look at openshot. Never tried it. My wife used to use a pinnacle device and software.