Adobe 65021048 User Guide - Page 427

ADOBE PREMIERE PRO CS3 421 User Guide that you prepared and saved previously. You can load color palettes in the ACO (Photoshop color swatch), ACT (Photoshop color palette), or PAL (Windows palette-Windows only) format. Note: With the QuickTime file type, you can attach a 256-color palette to a movie of any bit depth. You can specify a palette for 24-bit movies to use when displaying on 8-bit monitors, and you can prevent palette "flashing" by attaching the same palette to many movies. Video for Windows supports attaching a palette only to an 8-bit movie. Frame Size Specify the dimensions, in pixels, for video frames you export. Select 4:3 Aspect to constrain the frame size to the 4:3 aspect ratio used by conventional television. Some codecs support specific frame sizes. Increasing the frame size displays more detail but uses more disk space and requires more processing during playback. Frame Rate Choose the number of frames per second for video you export. Some codecs support a specific set of frame rates. Increasing the frame rate may produce smoother motion (depending on the original frame rates of the source clips) but uses more disk space. Pixel Aspect Ratio Choose a pixel aspect ratio that matches the output type. When the pixel aspect ratio (displayed in parentheses) doesn't match 1.0, the output type uses rectangular pixels. Because computers generally display pixels as squares, content using nonsquare pixel aspect ratios appear stretched when viewed on a computer but appear with the correct proportions when viewed on a video monitor. (See "Common pixel aspect ratios" on page 30.) Quality If available, drag the slider or type a value to affect the exported video's picture quality and, consequently, its file size. If you are using the same codec to capture and export, and you've rendered previews of a sequence, you can save rendering time by matching the export quality setting with your original capture quality setting. Increasing quality above the original capture quality does not increase quality, but may result in longer rendering times. Limit Data Rate to _ K/Sec Select (if available for the selected compressor) and type a data rate to place an upper limit on the amount of video data produced by the exported video when it is played back. Note: In some codecs, quality and data rate are interrelated, so that adjusting one option automatically alters the other. Recompress Select to ensure that Adobe Premiere Pro exports a video file that is under the data rate you specified. Choose Always from the Recompress menu to compress every frame, even if it is already within the data rate, or choose Maintain Data Rate to preserve quality by compressing only the frames that are above the specified data rate. Recompressing previously compressed frames may lower picture quality. Deselect Recompress to prevent current compression settings from being applied to clips that were not altered when you edited them into the program. Note: Some capture card and plug-in software applications provide their own dialog boxes with specific options. If the options you see are different than those described in this section, refer to the documentation for your capture card or plug-in. Keyframe And Rendering export settings The following options are available in the Keyframe And Rendering panel of the Export Movie Settings dialog box and the Export Frame Settings dialog box: Bit Depth Allows user to override, for movie export, the project's bit depth settings. For more information about project bit depth settings, see Video Rendering Settings under "Adjust project settings and presets" on page 23. • Use Project Setting Renders the movie at the bit depth set for the project. • 8-bit Renders the movie at 8 bpc, even if Maximum Bit Depth is selected for the project. • Maximum Renders the movie at maximum bit depth, up to 32 bpc, even if Maximum Bit Depth is not selected for the project. April 1, 2008