Apple Final Cut Express HD - Manual (Page 1074)

1074 Part XIII Appendixes
You experience poor playback and stuttering video when trying to edit.
 Make sure you are not editing with media which uses keyframe compression, such as
Sorenson or Cinepak.
Your camcorder or deck doesn’t go to the specified timecode or won’t perform
a command.
 Make sure you selected the correct Easy Setup in the Easy Setup window (choose
Final Cut Express HD > Easy Setup).
General Performance Issues
Final Cut Express HD seems to be working slowly.
 The amount of memory available to Final Cut Express HD can make a big difference
in performance, especially with long projects. More RAM is also needed for software-
based real-time effects and long projects. You may not have enough RAM allocated
to Final Cut Express HD. This can be changed in the Memory & Cache tab of the
System Settings window.
Problems With Audio Quality
You don’t hear audio through your camcorder speakers.
 Make sure your cables are properly connected.
 If you are scrubbing audio in the Audio tab of the Viewer, increase the volume of the
computer’s audio output.
You don’t hear audio on your computer’s speakers when playing video from your
camcorder or deck.
 Make sure the speaker’s cables are properly connected.
 Make sure your audio cables are properly connected.
 If you’re monitoring your audio from your computer, make sure that Mute is off, and
that the computer’s volume is adjusted to a reasonable level.
 Make sure that the appropriate audio output is selected in the Sound pane of
Mac OS X System Preferences.
Captured audio sounds distorted and “crackly” during capture.
 During capture, make sure that you always set the Final Cut Express HD sample rate
to that of your recorded source material. Mismatched sample rates can result in pops
and crackles in the audio, incorrect audio/video sync, and generally diminished
sound quality. These rates are:
 32 kHz if you’re capturing media from a DV camcorder that was set to 12-bit
recording
 44.1 kHz if you’re capturing digital audio from certain DAT or CD players.
 48 kHz if you’re capturing from most digital video formats.