Apple Final Cut Pro 5 - Manual (Page 1296)

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Using RT Extreme
RT Extreme is the real-time effects architecture that
allows you to play back multiple video layers, video and
audio filters, motion, and other effects in real time,
without needing to render them first.
This chapter covers the following:
 Introduction to Real-Time Processing Using RT Extreme (p. 509)
 Using Real-Time Controls in Final Cut Pro (p. 519)
 Real-Time Audio Mixing in Final Cut Pro (p. 529)
 Choosing Real-Time Playback Versus Rendering (p. 531)
 Using a Third-Party Video Effects Accelerator Card (p. 532)
Introduction to Real-Time Processing Using RT Extreme
Real-time processing refers to your computer’s ability to process and display video and
audio information at the frame rate of your sequence, instead of requiring additional
render time (in which Final Cut Pro calculates each frame before displaying it). This is
sometimes referred to as native processing, because no additional hardware is necessary
other than a qualified Macintosh computer.
RT Extreme is capable of processing many effects at the same time at full, broadcast
quality. For example, with a fast enough computer, you can apply color correction
filters, superimpose titles, and add transitions, then play the results in real time. This
frees you from having to render these effects while you edit, and allows you to see
changes that you make to your effects immediately.