Image sequence settings for quicktime export – Adobe Photoshop CS4 User Manual
Page 581
574
USING PHOTOSHOP CS4
Video and animation
Last updated 1/10/2010
Image sequence settings for QuickTime export
Typically, QuickTime is used to export video files. However, you can also select Image Sequence from the QuickTime
Export pop-up menu. Click Settings to access the following options:
Format
Chooses a file format for the exported images.
Frames Per Second
Sets the frame rate for the image sequence.
Insert Space Before Number
Inserts a space between the name and generated number in the image’s filename.
Options
If available, click the Options button and set format-specific options.
For more information on the specific file formats and their options, see also “
Saving and exporting files in other
” on page 458 and “
For a video on working with image sequences, see
Specify MPEG-4 export settings (Photoshop Extended)
1
In the Render Video dialog box, select QuickTime Export, and choose MPEG-4 from the pop-up menu. Then click
Settings.
2
In the MPEG-4 Export Settings dialog box, choose MP4 or MP4 (ISMA) from the File Format menu. The MP4
(ISMA) format ensures operability with devices made by ISMA members.
3
Under Video, specify the following:
Video Format
Chooses the codec to compress your video. For the highest quality at the lowest data rate (or the smallest
file), H.264 is recommended. If you need the file to play on a device that supports MPEG-4 video, choose MPEG-4
Basic or MPEG-4 Improved, depending on the target device. If your source movie’s video track is already compressed,
you can choose Pass Through so that the video doesn't get compressed again.
Data Rate
Specifies the kilobits per second (kbps) during playback. A higher kbps rate usually improves movie
playback quality; however, don't choose a data rate higher than the available bandwidth.
Optimized For
Specifies how much the data rate can vary above and below the data rate you choose. This option
becomes available if you choose MP4 from the File Format menu, choose H.264 from the Video Format menu, click
Video Options, and select Best Quality.
Image Size
Specifies the pixel dimensions of your exported video. Current maintains the source material size. To
specify a size not listed in the Image Size menu, choose Custom.
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 key frames are generated automatically or specifies how frequently key frames are created in
the exported video. A higher key frame 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.