Hints on Shooting the Initial Green Screen Video
Chroma key effects are a normal part of many video editing projects. When you watch a weatherman on television, standing in front of a graphic background, chances are he is standing in front of a green screen. Adobe Premiere has a video keying effect to make the green screen transparent and insert graphics or a new background into its place.
When starting on this, there are some things to keep in mind while shooting the video.
Making green screen keying work properly takes hard work while filming. All the lighting and colors need to be precise and close to perfect. If you are just using textures or graphics, you don’t have to worry as much about small discrepancies. However, if you are placing an entire new background in the shot, you have to be careful when shooting it.
High contrast scenes work to make light backgrounds transparent with dark objects in the foreground. The same is true if the light objects are shot against a dark background. Make sure the objects you don’t want to key out are not the same color as the background. Keep green clothing off of people when the background is a green screen.
It is also recommended that you use a tripod when shooting green screen work. A moving camera will disorient the viewer when the background is different than what is shot in the foreground. If the background being substituted in is busy, this is less of a problem.
It is also important to keep the lighting the same in the two shots. If the background is an outdoor shot, it might be better to shoot the green screen outdoors. It can also be lit to resemble outdoor lights as well.