Green Screen - Mellini Pillay

 This Friday morning Techie Breakie PD was presented and prepared by Mellini Pillay.  Thanks Mellini!

To use the green-screen effect:

1. Record video in front of an evenly lit, solid bright green or blue backdrop. Download onto iphoto and then import it into iMovie. To use photos drag onto your desktop and then drag into imovie .

When you record, do the following for best results:

• Make sure the subject of the video isn’t wearing anything green and don’t include anything green in the shot other than the backdrop. If possible, use multiple lighting sources to eliminate shadows on the subject being recorded.
• Record a moment at the end with the subject out of the frame. This indicates to iMovie what should be cut out when the video is superimposed.
1. Make sure Advanced Tools are turned on. (Open iMovie, open Preferences and select Show Advanced Tools)
2. Open the project you want to add the green-screen effect to or start a new project.
3. Add an image (downloaded from the internet or iphoto, etc) to the project.
4. In the Event browser, select video (a frame range or an entire clip) that you recorded in front of the green backdrop or a photo taken in front of the green screen.
5. Drag the selection directly over the image—and release the mouse button when you see a green Add (+) symbol.

7. In the contextual menu that appears, choose Green Screen or Blue Screen.

The green-screen or blue-screen clip appears above the video clip in your project, as shown below.

You can drag it to a different spot within the clip, or to a different clip, to reposition it. You can also drag the ends to lengthen or shorten it. To drag an end, move the pointer over it until the pointer changes to a resize pointer, and then drag.

8. To more effectively mask areas of the green-screen clip, click to select the clip in your project (so that its border turns yellow). In the viewer click Cropped, and then drag the handles at the top or bottom of the viewer to more tightly enclose the subject of the video.

Anything outside the highlighted area in the green-screen clip is removed from the picture. Be sure not to crop out areas that the subject moves into at any point during the green-screen or blue-screen clip.

9. To produce a better-quality effect, double-click the green-screen or blue-screen clip in the Project browser to open the inspector, and then select “Subtract last frame.”

This action works only if you’ve included a moment at the end of the green-screen or blue-screen footage with the subject completely out of the frame.

10. Play back the effect by placing the playhead (the red vertical line) anywhere before the blue- or green-screen clip in the Project browser and then pressing the Space bar.

Press the Space bar again to stop playback.

To delete a green-screen clip:

Click to select the green-screen or blue-screen clip in the Project browser (so that its border turns yellow), and then press Delete.

Sound from the original clip and the sound from the green-screen or blue-screen clip play simultaneously. You can reduce the volume of either clip so that sound from the other clip stands out.

You can edit green-screen the same way you edit standard clips in your projects. For example, you can trim them using the Clip Trimmer, adjust their audio and video, crop them, and add video effects to them. You can also reposition or trim them using the Precision Editor.

Kidpix drawings can be used to create movies with the Green Screen option.

• Kidpix pictures can be exported into imovies by
• 1.In Kid Pix, choose Export to iMovie from the File menu.
• 2.The Kid Pix: Export to iMovie dialog appears.
• 3.Type a name for the frame and select the location you want to export the frame to.
• 4.Choose Movies option then export.
• 5.Open imovie. Choose import from the File menu.
• 6.Choose Movies and then find your file and import.

·      Drop one picture over the other and choose the green screen option. Remember that both pictures need to have a blue or green background for the green screen option to work.