อ้าว นึกว่าสะบายดีหลวงพระบางไปแล้ว งั้นสืบพยาน ชี้เป้าอีกที ...
http://kb2.adobe.com/cps/315/315856.htmlหลักฐานพยานแน่นหนาแบบนี้ น่าจะดิ้นไม่หลุดแล้วล่ะ ...
Rendering Compositions as Animated GIFs in After EffectsYou can render compositions as animated GIFs using the Animated GIF plug-in included with Adobe After Effects 4.x and later. The animated GIFs play automatically as movies when included on a Web page and displayed by a Web browser. In After Effects, you can specify settings for transparency, dithering, and looping.
Creating an Animated GIFYou can render any composition as an animated GIF. When displayed, an animated GIF file is downloaded by the Web browser into memory, then played in memory. The initial downloading and playback time can vary, depending on the server storing the file, the size of the file, network traffic, and the memory limits of the system running the browser. Once the file has been completely downloaded, however, the actual playback speed is determined by the duration and frame rate of the composition.
Typically, to avoid downloading delays, an animated GIF should have a short duration and a low frame rate. Frame rates of 5 frames per second (or less) are recommended, unless the duration is very short (approximately one second). Animated GIFs are rendered with 256 colors (8-bit palette). For more information about using animated GIF files, see the documentation for your Web browser or Web page creator.
To create an animated GIF:
1. Specify a frame rate for the composition.
2. In the Time Layout window, specify the work area for the composition.
Rendering Compositions as Animated GIFsTo render a composition as an Animated GIF:
1. Choose Composition > Make Movie.
2. In the Save File dialog box, specify a location and name for the animated GIF file. (On Windows systems, when you select the animated GIF format in step 4, the file extension automatically changes to .GIF.) Click Save.
3. In the Render Queue window, click the pop-up menu for Output Module, then choose Custom.
4. In the Output Module Settings dialog box, choose Animated GIF from the Format pop-up menu.
5. To specify options for the animated GIF, click the Format Options button and select them from the dialog box. (Note that the dialog box appears automatically the first time you select the Animated GIF format. The available options are described in the following section.)
Options for the Animated GIF Plug-inYou can select the following Animated GIF options from Format Options dialog box in the Output Module Settings dialog box. Color Palette Specifies the color palette used for displaying the animated GIF. Select one of the following palettes:
- Select Web safe to use a palette that contains the 216 colors common to both Macintosh and Windows system palettes. Because these colors are available to Web browsers on both types of systems, the Web Safe option ensures that the same colors are always used for the animated GIF, regardless of the system or browser.
- Select System to use a palette that contains the 256 colors of the current 8-bit system palette for either a Macintosh or Windows system (whichever is used to run After Effects during rendering of the animated GIF). Because colors differ between the two system palettes, colors in an animated GIF may not appear the same when viewed in a browser running on a platform different from the one on which it was created.
- Select Other to specify a color palette created from the Adobe Photoshop. The color palette can contain up to 256 colors. For information about creating a customized color palette from Adobe Photoshop, see "Converting to indexed color" in Chapter 4 of the Adobe Photoshop 4.0 User Guide.
Transparency Specifies how After Effects interprets the composition's alpha channel to include transparency in the animated GIF. The Transparency option works with the Color option (see the next section).
When you include transparency in an animated GIF, the Web page background shows through any transparent areas specified in the composition. For example, you could use transparency to make an object appear as if it is moving across the Web page. To create transparency in a composition, use the After Effects keying controls. Because an animated GIF can contain only two levels of transparency per pixel, After Effects must convert the 256-level alpha channel of the composition to this much simpler type of transparency, using one of the following options:- Select None to specify that the animated GIF contains no transparent pixels. The transparency (alpha channel) of the composition is ignored when you render it. In the Video Output section of the Output Module Settings dialog box, the Channels selection is automatically set to RGB.- Select Hard Edge to specify that each pixel whose alpha channel value is less than 128 (50% opacity) becomes transparent. The transition between transparent and opaque areas is abrupt and may not be desired for more subtle effects. The Hard Edge option, however, produces smaller files, which will download faster to the Web browser. In the Video Output section of the Output Module- Select Soft Edge to simulate partial transparency by creating a diffuse distribution of transparent pixels. For Soft Edge, transparency is based on a pixel's alpha channel value and the values of surrounding pixels. The Soft Edge option is best for compositions that require partial transparency, but it creates larger files that may not download as fast to the Web browser. In the Video Output section of the Output Module Settings dialog box, the Channels selection is automatically set to RGB + Alpha. Color Ensures proper transparency values in the animated GIF. If you choose None for Transparency, you do not need to select a color; it is ignored. If you choose either Hard Edge or Soft Edge for Transparency, select the following color by clicking For the System palette, or for a palette created from Adobe Photoshop, choose a color not used in the animated GIF.
Dithering Simulates the colors available in a large color palette by creating particular patterns of the colors available in a 256-color palette. In general, dithering produces a close approximation of an original image created with a larger color palette.
Dithering may result in larger file sizes and slower downloading. Because dithering can change from frame to frame depending on the motion of layers, selecting this option may produce undesired variations in color.
Looping Specifies that the animated GIF plays over and over again, continuously. If this option is not selected, the animated GIF plays once, displaying the last frame after the animation is complete.
To simplify the creation of animated GIFs, you can create an output module template that contains the settings you require. For more information, see "Creating and using output module templates" on pages 364-365 of the After Effects 5.0 user guide or pages 420-422 of the After Effects 4.0 user guide.
ชัดเน๊อะ ...
