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Image Transcoding Functions

A transcoder translates an image compressed in one format into a different compression format. A transcoder can use an algorithm that directly translates from one format into another, which is often faster and more accurate than decompression and recompression. If your application requests decompression of an image, but no decompressor for the image can be found, QuickTime will search for a transcoder that can be used to convert the image into a format for which a decompressor is available. The transcoder functions directly available to your application are:

• ImageTranscodeSequenceBegin

• ImageTranscodeFrame

• ImageTranscodeDisposeFrameData

• ImageTranscodeSequenceEnd

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