Quicktime export file formats, Understanding quicktime key frames, 3g export settings – Adobe Photoshop CS4 User Manual
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USING PHOTOSHOP CS4
Video and animation
Last updated 1/10/2010
More Help topics
Interpret video footage (Photoshop Extended)
QuickTime export file formats
3G
A file format developed for third-generation mobile devices.
FLC
An animation format for playback of computer-generated animations on workstations, Windows, and Mac
OS.
This format is also referred to as FLI.
Flash Video (FLV)
Adobe® Flash® Video is the Adobe format for streaming audio and video over the web and other
networks. (To use this format, you must first install an FLV QuickTime encoder).
QuickTime Movie
The Apple Computer multimedia architecture that includes a number of codecs. (To export audio,
you must use this format.)
AVI
Audio Video Interleave (AVI) is a standard format for audio and video data on Windows computers.
DV Stream
A video format with intraframe compression that uses FireWire (IEEE 1394) interface to transfer video to
nonlinear editing systems.
Image Sequence
A sequence of still images that can reside within one folder and use the same numeric or alphabetic
filename pattern (such as Sequence1, Sequence2, Sequence3, and so forth).
MPEG-4
A multimedia standard for delivering audio and video streams over a range of bandwidths.
Note: Photoshop also supports other third-party formats such as Avid AVR codecs; however, the necessary QuickTime
codecs must be installed.
Understanding QuickTime key frames
In QuickTime terminology, the term key frames refers to something different than the animation keyframes in
Photoshop. In QuickTime, key frames occur at regular intervals in the movie and are stored as complete frames. Each
intermediate frame that separates them is compared to the previous frame, and only changed data is stored. Using key
frames greatly reduces movie size and greatly increases the memory required to edit and render a movie. Shorter
intervals between key frames enable faster seeking and reverse playback, but can significantly increase the size of the file.
3G export settings
For more information on 3G settings, search for 3G on the Apple Computer web site.
File Format
3GPP and 3GPP2 are standards for the creation, delivery, and playback of multimedia over third-
generation high-speed wireless networks. 3GPP is for GSM networks and 3GPP2 is for CDMA 2000 networks. 3GPP
(Mobile MP4), 3GPP2 (EZmovie), and AMC (EZmovie) are for specific networks. 3GPP (Mobile MP4) is for NTT
DoCoMo’s i-motion 3G service. 3GPP2 (EZmovie) is for KDDI’s 3G network service. AMC (EZmovie) is for KDDI
subscribers with AMC-capable phones.
Video
Choose Video from the pop-up menu below the File Format menu and specify the following:
•
Video Format
Selects the codec used during video export. If your source movie has only one video track and it 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.