Overview

This chapter is primarily for application developers who wish to write image transcoders.

To use transcoders, refer to Chapter 3, "Image Compression Manager."

Prior to QuickTime 2.5, if you needed to convert compressed image data into another compressed image format, it was necessary to decompress the compressed image data to RGB pixels, and then compress the RGB pixels into the new format. For some types of compressed image data, it is now possible to convert directly from one compressed format to another. This direct conversion process is called image transcoding .