Apple Final Cut Pro 7 - Manual (Page 1788)

Important: When you create DVDs, your audio must have either a 48 kHz or 96 kHz sample
rate. If you use the 44.1 kHz sample rate found on standard audio CDs, DVD Studio Pro
and iDVD will convert your audio to the correct sample rate. Additionally, DVDs do not
support MP3-encoded audio. DVD Studio Pro and iDVD will convert any MP3 audio to
DVD-compliant uncompressed audio.
About Surround Sound Audio
Surround sound audio usually consists of six independent audio channels: front left, front
right, front center, rear left, rear right, and low-frequency effects (LFE, also known as the
subwoofer).
Mixing audio for use as surround sound is best left to specialized audio facilities that have
the required equipment and experience. Nothing can ruin a movie quite like badly done
surround sound audio. If you are using an audio post-production facility for your final
audio mix, you can use the Export Audio to OMF command to export all of the audio
from your edited sequence. For more information, see
“Exporting Audio for Mixing in
Other Applications.”
If you decide to mix your own surround sound audio, you can export suitable audio files
from Final Cut Pro that an AC-3 encoder can use to create a surround sound audio stream.
One method is to export four audio files: one for the front right and left, one for the center
(usually dialogue), one for the rear right and left, and one for the LFE (usually a mix of all
of the audio channels, with the AC-3 encoder filtering out the high frequencies to include
only the low frequencies).
Adding Chapter and Compression Markers to Your Sequence
Once you have finished editing your sequence or program, you can add markers to the
sequence for use on DVD. Markers are reference points you can place within clips or
sequences that identify specific frames. There are three kinds of markers that relate to
authoring a DVD:
• Chapter markers: These allow DVD authoring applications to create a navigable chapter
list for your exported QuickTime movie. Chapter markers force the creation of MPEG
I-frames at their location, because the DVD specification requires an I-frame at each
chapter point.
• Compression markers: Also known as manual compression markers—these are markers
you can add to a sequence or clip to indicate when Compressor or DVD Studio Pro
should generate an MPEG I-frame during compression. For more information, see the
documentation included with Compressor and DVD Studio Pro.
1788 Chapter 107 Exporting Sequences for DVD