Perhaps the most common form of video manipulation is green-screening where a person is filmed in front of a green screen and then a background is digitally inserted. This popular technique is routinely used in television and movies. The techonology for creating such an effect is now available with standard video editing software.

If the quality of the foreground and background video are different, then such video composites can be detected. Shown below in the left panel is a short video where the background was digitally inserted using green-screen techniques. Shown in the right panel is the result of our analysis where the black regions denote tampering (the red squares denote regions where there is not enough content to make a determination of authenticity).