Apple Final Cut Pro 5 - Manual (Page 1312)

Chapter 23 Using RT Extreme 525
III
 Playback Video Quality: Some codecs, such as DV, allow you to choose from several
resolutions during playback. Most codecs support three levels of quality (high,
medium, and low), while others support only high and low qualities. Selecting a higher
playback quality will reduce the number of simultaneous real-time effects you can play.
 Dynamic: This option allows Final Cut Pro to automatically change between High,
Medium, and Low quality as necessary to maintain real-time playback. In this case,
the quality of the video resolution can change frame by frame.
 High: Guarantees full-frame, full-resolution video playback. Video interlacing is
preserved.
 Medium: Displays every other pixel and every other line (this is known as quarter
frame resolution). Because only half the lines are shown, the video is displayed non-
interlaced. Media is decompressed using a full quality decompression algorithm.
 Low: Quarter frame resolution just like medium resolution. However, your media is
decompressed and displayed with a low-quality decompression algorithm which
requires significantly less processing power.
 Playback Frame Rate
 Dynamic: This option varies the displayed frame rate as necessary to achieve the
highest quality playback with the most effects. When more processing power is
required, Final Cut Pro can reduce the frame rate to spend more time calculating
fewer frames. When little or no effects are applied, Final Cut Pro can return to
playback at the full frame rate.
 Full: Your sequence plays back at the frame rate (editing timebase) assigned in
Sequence Settings.
 Half: Your sequence plays back at half its assigned frame rate. For example, if the
frame rate of your sequence is 24 fps, the playback frame rate is 12 fps.
 Quarter: Your sequence plays back at a quarter of its assigned frame rate. If the
frame rate of your sequence is 24 fps, the playback frame rate is 6 fps.
 Multiclip Playback: This allows you to watch all multiclip angles play at once in the
Viewer while you switch or cut in real time. When this option is enabled, and you
choose Open from the Playhead Sync pop-up menu, multiclips in your sequence are
automatically opened in the Viewer and all angles play back at the same time while
the active angle plays in the Canvas. For more information, see Volume II, Chapter 16,
“Working With Multiclips.”
 Pulldown Pattern: If your sequence has a frame rate (timebase) of 23.98 or 24 fps and
you want to output to an NTSC or PAL device via FireWire, you can choose one of five
pull-down insertion patterns. Pull-down insertion is a method of converting film or
other progressively scanned material to an interlaced format running at a different
frame rate. For more information, see the Cinema Tools documentation. These options
are available only when your sequence has a frame rate (timebase) of 23.98 or 24 fps.