Adobe 13102498 User Guide - Page 595
Export image sequences, Data Rate, Compressor, Dimensions, Preserve Aspect Ratio Using
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PHOTOSHOP CS3 588 User Guide original frame rates of the source clips) but uses more disk space. If available, specify how often the keyframes are generated. Certain QuickTime Codecs use frame differencing to compress the movie file by taking one full image frame of video information and generating the next number of frames by storing only the differences between each frame and the first full image frame. The first full image frame is called a keyframe (not to be confused with the keyframes used in the timeline mode of the Animation palette). Data Rate 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. Compressor Set compressor options specific to the selected Codec. Click the Option button (if available) to specify further compressor options. If available, choose the color depth, or the number of colors to include in video that you export. This menu is not available if the selected Codec supports only one color depth. If the Quality slider is available under Compressor, drag the slider or type a value to adjust 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. Note: Compressor options are not available for the Component Video Codec. QuickTime movie size settings The following settings are available in the Export Size Settings dialog box: Dimensions Specifies the frame size for your exported movie. If you want to specify a frame size not included in the Dimensions menu, choose Custom and enter values for Width and Height. Preserve Aspect Ratio Using Specifies an option if the movie is scaled to a new frame size. Letterbox scales the source proportionally to fit into the clean aperture, adding black bars to the top and bottom or sides as necessary. Crop centers, scales, and trims to the clean aperture. Fit Within Dimensions adjusts to the destination size by fitting to the longest side, scaling if necessary. Deinterlace Source Video Deinterlaces the two fields in each interlaced video frame. Export image sequences 1 Choose File > Export > Render Video. 2 In the Render Video dialog box, enter a name for the video or image sequence. 3 Click the Select Folder button, navigate to the location you want to save your video, and then click Choose. To create a folder to contain your exported files, select the Create New Subfolder option and enter a name for the subfolder. 4 Under File Options, select Image Sequence, then choose a file format from the pop-up menu. 5 (Optional) Click the Settings button to set options for saving the files. For more information on file formats and their export options, see also "File formats" on page 459 and "Saving and exporting files in other formats" on page 452. 6 (Optional) If you selected Image Sequence in step 4, enter the Starting number and choose the number of digits from the Digits pop-up menu. This option specifies the numbering system for the exported image sequence files. 7 Use the Size pop-up menu to specify the pixel dimensions for the exported files.
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