Quartz Composer has many similarities to Max/MSP or Vvvv although its primary usage is for graphical rather than audio processing. The ability to construct interactive video compositions that react to audio or MIDI signals but which can be played from any QuickTime-aware application has caused a great deal of interest in Quartz Composer from VJs.
PATCHES
Quartz Composer works by connecting patches. Patches are the base processing units. They execute and produce a result. For better performance, patch execution follows a lazy evaluation approach, meaning that patches are only executed when their output is needed. There are three types of patches: Consumers, Processors, and External Input patches that can receive and output mouse clicks, scrolls, and movements; MIDI and audio; keyboard; or other movements. A collection of patches can be melded into one, called a macro. Macros can be nested and their subroutines also edited.
COMPOSITION
Patches, their connections, and their input port states are saved in the composition file. Images can be stored inside a composition as well, making for self-contained compositions with embedded graphics. By dragging a movie file into the Quartz Composer editor, a reference to the movie file is created, providing a changing image that can be connected to a renderer.
Compositions also store metadata such as composition author, copyright, and description.
IMAGE FILES RECOGNISED: PEG, JPEG2000, GIF, PNG, TIFF, TGA, OpenEXR, BMP, ICO, PDF, PICT, ICNS
Support for some Automator actions were added with the release of Leopard.
-Apply Quartz Composition Filter to Image Files
-Convert Quartz Compositions to QuickTime Movies
-Render Quartz Compositions to Image Files
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