Apple Cinema Tools 3 - Manual (Page 160)

160 Chapter 9 Export Considerations and Creating Audio EDLs
When you make a videotape from a 24 fps sequence, some video output devices create
an NTSC or PAL signal by inserting extra fields as needed to go from 24 fps to 25 fps or
29.97 fps. Such a tape is generally fine for viewing, but not as accurate as it should be if
it is to be used as a visual reference in cutting the negative. Be sure to let your negative
cutter know if there are issues with the videotape (such as the video occasionally
displaying the wrong frame).
Considerations When Exporting Audio
Depending on your project’s needs, you may be able to use the edited audio from
Final Cut Pro directly in the film’s release print. More often you will want to finish the
edited audio using a specialized application or a facility specializing in audio finishing.
This is typically where sound effects, music, and any dialogue issues are added or
enhanced. There are a number of items that impact this process:
 the type of audio file required: You can export an OMF (Open Media Framework) or
AIFF (Audio Interchange File Format) file.
 the audio speed: Depending on how the video was transferred, you may have slightly
altered the speed of the audio to maintain synchronization.
You may also decide to recapture and reedit the audio at an audio postproduction
facility. In this case, see “
Exporting an Audio EDL ” on page 161 for details.
Exported Audio File Formats
There are two common formats used to export audio from a Final Cut Pro project:
OMF files and AIFF files.
OMF Files
An OMF file contains not only the audio, but also a description of the audio edits.
Digital Audio Workstations (DAWs) that can import OMF files can take advantage of
having the edit In and Out points along with other information, such as cross fades,
enabling them to make small changes. OMF files typically contain all of the audio tracks
used in the program (other export formats have limits).
Another advantage of OMF files is that they can contain the audio and edit information
from non-timecode sources, such as audio CDs. (Audio EDLs describe only edits using
timecode-based sources, and do not include any references to sources such as audio CDs.)
See the Final Cut Pro documentation for information on exporting OMF files.
UP01101.Book Page 160 Thursday, March 10, 2005 3:16 PM