User`s guide

Chapter 6: Recording and Adding to the Movie Track 39
Due to these variables, the approximate record
time left is intended to provide you a rough es-
timate and may not be an accurate reflection of
your available record time.
The calculation of approximate record time left
is a conservative estimate based on the highest
data rate possible for that resolution. The ap-
proximation may vary by several minutes.
Pro Tools uses the approximate record time left
value to allocate drive space before recording.
Because of variables inherent to this estimation
process, you may find that you have available
record time left after you thought you had filled
the drive.
The record time left is not approximate if you
are capturing video at a compression rate of 1:1
(uncompressed) in AVoption XL. Since this
video is uncompressed, it uses the same data
rate, regardless of the image.
Exporting Files from Avid
Programs
If you already have a project that was created on
an Avid video authoring system, you can export
it to an OMF file so the material can be added
into your AVoption or AVoption XL system.
This exchange of data between systems is signif-
icantly faster and easier than other methods,
such as laying-off to tape and re-digitizing. This
section uses a Media Composer project as an ex-
ample.
DigiTranslator
DigiTranslator is included with your AVoption
or AVoption XL package. Use DigiTranslator to
convert OMF files containing video and audio
into Pro Tools session files. You can also use it to
export audio material from Pro Tools sessions to
OMF files for import into other systems. Refer to
your DigiTranslator documentation for more
details.
Multi-Streams and AVoption and
AVoption XL
While some Avid systems support two simulta-
neous streams of real time video, AVoption and
AVoption XL support only one stream. For this
reason, it is necessary to make sure that all
multi-stream transitions and effects are ren-
dered in the Avid sequence before you export.
If you add a sequence into Pro Tools that in-
cludes multi-stream effects, AVoption will sub-
stitute black frames in their place.
AVoption does not require the entire sequence
to be rendered into one continuous clip (often
referred to as a “video mixdown” in Avid).
AVoption and AVoption XL can add complex
single-stream sequences as multiple clips.
What to Export
When you export from your Avid software, you
have two choices. You can export the audio and
video from a project, or you can export the au-
dio or video only.
Video and Audio
If your Media Composer project has video and
audio in it, export both the video and the audio
to the OMF file.
Video Only
If you have already started audio post produc-
tion in Pro Tools and you want to replace the
Movie track with a more recent version, or your
Avid project has no audio in it, export the video