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Chapter 16 Preferences and metadata 499
Playback
 Use proxy media: Click this button to use medium-quality proxy media (converted
to one-quarter resolution) rather than full-resolution media for playback. Choosing
this option increases playback performance, but the video quality is lower. In
Final Cut Pro, proxy media is in the Apple ProRes 422 (Proxy) format.
 Use original or optimized media: Click this button to use the optimized media for
playback. If optimized media is not available, Final Cut Pro uses the original media
for playback. In that case, use the Playback Quality pop-up menu to choose
whether to always use the highest-quality video for playback or downsized video
for better playback performance. In Final Cut Pro, optimized media is in the Apple
ProRes 422 format.
 Create optimized media for multicam clips: Select this checkbox to automatically
transcode multicam clip video to the Apple ProRes 422 codec, which provides better
performance during editing and faster render times.
 Warn when dropping frames during playback: Select this checkbox to have
Final Cut Pro warn you when frames are dropped during playback.
 Warn when frames are dropped due to hard disk performance: Select this checkbox to
have Final Cut Pro warn you when frames are dropped during playback specically
because of hard disk performance.
Pre-Roll Duration
 Pre-Roll Duration: Use this value slider to set the amount of time to play before an
audition or before the skimmer or playhead position when using the Play Around
command.
Post-Roll Duration
 Post-Roll Duration: Use this value slider to set the amount of time to play after an
audition or after the skimmer or playhead position when using the Play Around
command.
Player Background
 Player Background: Use this pop-up menu to choose a background for the
Viewer. The color you choose will be visible in the case of partially or completely
transparent clips, or clips that do not ll the frame completely.
A/V Output
 A/V Output: Use this pop-up menu to choose an external audio/video device or
monitor for output. A/V output requires third-party video interface hardware and
software and is available only with OS X Lion v10.7.2 or later. For more information,
see “View playback on an external video monitor” on page 90.