User Manual

Chapter 17: Importing and Exporting Session Data 363
A master clip consisting of the region plus the
handle size (length) on both front and back will
be exported. The exported sequence creates a
subclip which is equivalent to the original re-
gion, but extended to the farthest frame bound-
aries. For example, if the region starts at 1:15
and 500 samples, the subclip would start at 1:15;
and if the region ends at 4:00 and 500 samples,
the subclip would end at 4:01.
Because quantizing edits to frame boundaries
extends the regions, extra undesired audio may
be heard. To prevent this extra audio from play-
ing, special one-frame sound files are rendered
to duplicate the original boundaries of the re-
gion. In the exported sequence, these one-frame
files are placed over the start and end frames of
the extended region so you cannot hear the ex-
tension.
One-frame files (OFFs) are imported into Avid
workstations as part of the AAF or OMF se-
quence like any other sound file. In the Avid
Timeline, they appear as one-frame edits on ei-
ther side of a subclip.
If you decide you need to extend the subclip at
any point, discard the OFF and trim the subclip
as needed.
Sample Rate Conversion Options
These settings allow you to convert the sample
rate of your Pro Tools session during export to
AAF or OMF by sample-rate converting each au-
dio file, and adjusting the edits in the resulting
AAF or OMF file to compensate for this change.
You might want to change the sample rate of a
session if you are exporting to a system or are at
a stage in the process that requires a different
sample rate.
For example, your session contains audio media
at 29.97 fps (NTSC video) at 48 kHz, while the
film composer to whom you are exporting your
session requires audio media at 24 fps (film
speed) at 48 kHz. To convert all the audio files
and edits to play back at 24 fps (film speed) at 48
kHz, you would set the Source Audio Sample
Rate setting to 48,048 (a pull-up rate of 0.1%)
and the Destination Audio Sample Rate to
48,000. These settings tell Pro Tools that you
want to fit 48,048 of the original video speed
samples into 48,000 of the new film speed sam-
ples. With these settings, you sample-rate con-
vert the video material to film speed.
This solution is only available when you ex-
port a sequence, not when you export individ-
ual files.
If Quantize Edits to Frame Boundaries is se-
lected, Pro Tools volume automation will not
be exported.
Sample Rate Conversion Options
See “Speed Correction for Film, NTSC Video,
and PAL Video” on page 1141, for informa-
tion about converting between different
speeds and sample rates.
Check the Audio and Video pull options be-
fore applying a sample rate conversion to the
entire session.