Playback preferences affect playback and rendering performance in Final Cut Pro.
Note: For information about controlling playback quality and performance, including switching between original or optimized media and proxy media, see Control playback quality and performance.
Background render: Select this checkbox to turn on Final Cut Pro rendering operations when the system is idle.
Start after: Use this value slider to set the amount of time your system is idle, in seconds, before Final Cut Pro begins background rendering.
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.
If a frame drops, stop playback and warn: Select this checkbox to have Final Cut Pro warn you when frames are dropped during playback.
If frames drop due to disk performance, warn after playback: Select this checkbox to have Final Cut Pro warn you if frames were dropped specifically because of hard disk performance.
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: 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 fill the frame completely.
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.