Adobe Photoshop CS3 - Manual (Page 594)

PHOTOSHOP CS3
User Guide
587
Preserve Aspect Ratio Using Specifies an option if the movie needs to be scaled to the new pixel dimensions.
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 Size adjusts to the destination size
by fitting to the longest side, scaling if necessary.
Frame Rate Specifies the frame rate for the playback of your exported video. Usually, your video looks better if you
choose a number that is exactly divisible by the frames per second (fps) of your source. For example, if your source
is captured at 30 fps, choose a frame rate of 10 or 15. Don’t choose a rate greater than that of your source material.
Key Frame Specifies that keyframes are generated automatically or specifies how frequently keyframes are created in
the exported video. A higher keyframe rate (lower number) improves video quality, but increases the file size.
4 (MP4 file format only) Click the Video Options button and specify the following:
Re-sync Markers (MPEG-4 Basic and MPEG-4 Improved only) Uses re-sync markers in the video bit-stream. This
can help regain synchronization due to transmission errors.
Restrict Profile(s) To (H.264 only) Selects profiles for playing video files on a device that conforms to one or more of
the standard's profiles.
Encoding Mode (H.264 only) Specifies whether you want the best quality or faster encoding.
Specify QuickTime Movie settings (Photoshop Extended)
1 In the Render Video dialog box, select QuickTime Export and then choose QuickTime Movie from the pop-up menu.
2 Click the Settings button.
3 In the Movie Settings dialog box, make sure Video is selected.
Important: Although the Movie Settings dialog box has Sound options, Photoshop Extended CS3 does not support audio
tracks.
4 Under Video, click the appropriate button to set the following:
Settings Opens the Standard Video Compression Settings dialog box so you can set the video compression and
accompanying options.
Filter Opens the Choose Video Filter dialog box, where you can apply built-in QuickTime video effects.
Size Opens the Export Size Settings dialog box to specify pixel dimensions for your exported video.
5 (Optional) If your movie is being delivered over the Internet, select Prepare For Internet Streaming and choose
any of the following:
Fast Start Sets up the movie to start playing from a web server before the movie has completely downloaded to a
user’s computer hard drive.
Fast Start-Compressed Header Compresses the movie’s header losslessly and sets up the movie to start playing from
a web server before the movie has completely downloaded to a user’s computer hard drive.
Hinted Streaming Sets up the movie to be streamed by a QuickTime Streaming Server.
QuickTime standard video compression settings
The following options are available in the Standard Video Compression Settings dialog box:
Compression Type Choose the Codec to apply when exporting a file.
Motion Specify the frame rate for your video by choosing the number of frames per second (fps). Some Codecs
support a specific set of frame rates. Increasing the frame rate may produce smoother motion (depending on the