Tự học iLife - p 22 pps

193 WORKING WITH iMOVIE ’09 Adding Special Effects to Movies chapter 10 11 22 66 88 77 99 How do I add a cutaway effect? A cutaway is similar to a picture-in-picture effect except that the added clip takes up the entire screen. You can use a cutaway to show a person’s response to action in the scene or to cover up imperfect footage. You must have the Advanced Tools turned on in iMovie’s preferences to add a cutaway. 1 Click and drag the selection you want to use as the cutaway onto a clip in the project. 2 Click Cutaway in the menu that appears. iMovie adds a cutaway to the project. iMovie inserts the clip. ● The inserted clip appears as a thumbnail above the other clip. 7 In the viewer, click and drag the middle of the embedded clip to change its position. 8 Click and drag a corner to change its size. 9 Click Done to save the changes. ● You can select the embedded clip and press to preview it. 6 Click Picture in Picture in the menu that appears. 194 22 44 55 33 66 11 San Francisco San Francisco San Francisco Rome Rome Rome The Choose City or Airport dialog appears. 4 Type a city or airport code. iMovie displays results for the search term. 5 Click a result to select it as a start location. ● You can optionally edit the label so it shows a different location, a landmark, or a person’s name. 6 Click OK to return to the Inspector. 1 Click to view the maps and backgrounds browser. iMovie displays globe maps and flat maps for adding to your project. 2 Click and drag a map to between clips in your project. iMovie adds the map to your project and the Inspector opens. 3 Click the Start Location button. Add an Animated Travel Map You can add a map to a travel-oriented project that shows starting and ending locations on the map. When you play the map, an animation connects the two locations. iMovie includes a database with thousands of geographic locations to help you illustrate places featured in your movie. Add an Animated Travel Map 195 WORKING WITH iMOVIE ’09 Adding Special Effects to Movies chapter 10 11 22 33 99 8877 Can I show a world map without displaying a specific location? iMovie features several flat world maps without locations in the maps and backgrounds browser. 1 Click and drag a flat map from the third row in the browser to your project. iMovie adds a map without locations to your project. 2 Position the cursor over the map and double-click the crop icon ( ) to open the Crop tool. 3 Click and drag the green and red boxes to adjust the Ken Burns effect, which is the panning and zooming that takes place when the map appears. For more about the Ken Burns effect, see Chapter 8. To feature a map that shows just a single location, skip to step 9. 7 Click to include an end location ( changes to ). 8 Click here and repeat steps 4 to 6 to select an end location. 9 Click Done to save the new map. ● You can click the map and press to preview the animated map. 196 44 22 11 33 F INIS HFINISH F INIS H FINISH 2 Add the background on which you want your subjects to appear to your project. Note: The background can be a video or a still photo. For more about adding still photos to a project, see Chapter 8. 3 Select the green-screen clip. 4 Click and drag the selection onto the background. 1 Create a clip of your subjects against a solid green backdrop. Note: You can buy green fabric from a video production supply store. The color used for this technique is called chroma key green. Add a Green-Screen Effect You can capture action in front of a green- colored backdrop and then use iMovie’s tools to replace the backdrop with another image. You can use the effect to place people in famous locations, next to interesting animals, or against illustrated backgrounds. The green-screen feature is one of the iMovie advanced tools. To turn on the advanced tools, see “Add a Picture-In-Picture Effect.” Add a Green-Screen Effect 197 WORKING WITH iMOVIE ’09 Adding Special Effects to Movies chapter 10 55 66 77 How can I subtract the final frame to improve the green-screen effect? When shooting a clip, you can have the subjects move out of the frame at the end so that only the green backdrop is shown. You can then have iMovie analyze that final frame to improve the quality of the effect. Double-click a green-screen clip in the project browser to open the Inspector. Then select Subtract last frame ( changes to ) to apply the setting. How can I use cropping to improve the green-screen effect? You can crop the subject in the clip to lessen the chance that unwanted artifacts appear around it, which can happen when the green backdrop is not perfectly solid. Click to select the green-screen clip in the project browser. iMovie displays the clip in the viewer. Click and drag the crop handles ( ) in the viewer to isolate just the subject of the clip and anywhere else the subject moves during the segment. iMovie adds the clip as a green- screen clip, which appears above the background in the project browser. 6 Click to select the green-screen clip. 7 Click to preview the effect in the viewer. The green backdrop is automatically removed from around the subjects. 5 In the menu that appears, click Green Screen. 198 11 33 44 22 Keywords iMovie adds the keyword to the clip. ● You can click multiple check boxes to add multiple keywords to a clip. ● Clips with keywords are marked with a blue line. ● To remove a keyword, select a clip and click here ( changes to ). ● To add a new keyword to the list, type the term and press . ADD A KEYWORD TO A CLIP 1 In the event browser, click and drag to select the clip to which you want to add a keyword. You can apply keywords to an entire clip or just part of a clip. 2 Click to open the keywords panel. The keywords panel opens. 3 Click Inspector. 4 Click to add a keyword to the selection ( changes to ). Organize Clips Using Keywords You can assign keywords to describe the subject matter, location, and other characteristics of your clips. Then you can filter clips in the event browser by keywords to pull up the content you need for your projects. The keywords feature is one of the iMovie advanced tools. To turn on the advanced tools, see “Add a Picture-In-Picture Effect.” Organize Clips Using Keywords 199 WORKING WITH iMOVIE ’09 Adding Special Effects to Movies chapter 10 11 22 33 How do I apply more criteria in the Keyword Filter? Follow these steps: A green icon ( ) means a clip must have that keyword to be displayed. ● Click a keyword name to toggle the green icon on and off. A red icon ( ) means a clip must not have that keyword to be displayed. ● Click to toggle the red icon on and off. ● Clicking Any displays clips that meet any of the criteria. ● Clicking All displays clips that meet all of the criteria. FIND BY KEYWORDS 1 Click in the event library to select a collection of videos. 2 Click . The Keyword Filter pane appears. 3 Click a keyword. ● appears next to the keyword. ● iMovie filters the clips, showing only the clips that have been assigned that keyword. ● You can click to toggle the filter on and off. 200 33 44 55 11 22 4 Type a name for the file. 5 Select the location where to save the file. 1 Open the project that you want to save. 2 Click Share. 3 Click Export Movie. Save a Movie to Your Computer You can save the clips, titles, transitions, and other content that you have assembled in a project as a single movie file on your computer. You can then play the movie on your computer, upload it to a Web site, or back it up to a CD-ROM or DVD. Save a Movie to Your Computer 201 chapter 11 66 77 Sharing a Movie WORKING WITH iMOVIE ’09 In what file format does iMovie save my exported movies? When using the Export Movie command, the file format depends on the size. ● Selecting Tiny in the export options saves a 3GP file, which is a type of MPEG-4 format devised especially for mobile devices. ● Selecting Mobile, Medium, or Large saves a regular MPEG-4 (.m4v) file. Note: To save your movie in a variety of other formats, see the tip in “Publish a Movie to a MobileMe Gallery.” iMovie saves the project as a movie file. ● You can click Cancel to stop the export. 6 Click a size to export based on how you want to use the movie ( changes to ). ● iMovie shows the devices and applications for which each size is appropriate. 7 Click Export. 202 44 77 55 66 88 22 33 5 Type a title and description. These will appear on the movie page at your MobileMe account. 6 Select the sizes to publish ( changes to ). Viewers can choose from a size depending on their connection speed. 7 Select a privacy setting. 8 Click Publish. 1 Sign in to your MobileMe account. 2 Open the project that you want to publish. 3 Click Share. 4 Click MobileMe Gallery. Publish a Movie to a MobileMe Gallery You can publish your movie to your MobileMe gallery. You can then send your friends and family a Web address where they can access the movie on MobileMe. To use this feature, you must have a MobileMe account. See Chapter 2 for details. Publish a Movie to a MobileMe Gallery . iMovie displays globe maps and flat maps for adding to your project. 2 Click and drag a map to between clips in your project. iMovie adds the map to your project and the Inspector opens. 3. clip in the project. 2 Click Cutaway in the menu that appears. iMovie adds a cutaway to the project. iMovie inserts the clip. ● The inserted clip appears as a thumbnail above the other clip. 7. ’09 Adding Special Effects to Movies chapter 10 11 22 66 88 77 99 How do I add a cutaway effect? A cutaway is similar to a picture-in-picture effect except that the added clip takes up the entire