Specifications

Pro Tools Avid Unity MediaNetwork Guide6
Embedded Media and Linked
Media
There are two ways to handle media files when
exporting AAF or OMF files:
• Embedded media (in which the media files are
embedded in an AAF or OMF sequence)
• Linked media (in which media files are refer-
enced by an AAF or OMF sequence)
Pro Tools lets you import AAF or OMF sequences
containing embedded audio files. You can also
import AAF or OMF sequences containing em-
bedded video files, but only if you are importing
them to a video satellite track. In such a case,
only the video metadata is imported.
Frame-Rate Accurate Video
Editing and Sample-Rate
Accurate Audio Editing
Avid applications edit with frame accuracy. This
means that in a 30-fps project, you can edit at 30
different locations for every one second of
video. Pro Tools edits with sample rate accuracy.
In a 48-kHz session, there are potentially 48000
locations to edit for every second of audio.
When Pro Tools exports an AAF or OMF compo-
sition destined for an Avid application, it must
ensure that the audio files line up on frame
boundaries. To do this, it might have to split an
existing audio region into three separate re-
gions. For example, the following illustration
shows a 5-frame video clip and a corresponding
audio region. In Pro Tools, the audio regions
might not line up on video frame boundaries.
In order to export frame accurate audio regions,
Pro Tools splits the audio media on frame
boundaries and fills any gaps with silence. The
following illustration shows the resulting audio
regions that are exported to Avid.
When you use Export Selected Tracks as
OMF/AFF to export tracks from Pro Tools with
Enforce Avid Compatibility enabled, a number
of additional media files labeled Sample Accu-
rate Edit appear in the Avid bins. These are the
additional media files that Pro Tools creates to
ensure that the Avid editing application receives
frame-accurate audio. You also see the sample-
accurate edit media files if you zoom in on the
imported audio in the Timeline.