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Low
Resolution to High Resolution:
Step by Step
by Robert
Brakey
On occasion you may need to take a
sequence from a low-resolution film project into a higher
resolution video project. Here is a step-by-step way to do
so.
But before you begin, you should know
that the higher resolutions on Avid systems, such as AVR 77,
are dual field, and by definition use both fields of all
video frames in digitizing. Film projects, however, utilize
pulldown during digitization to convert from five video
frames to four film frames, and in so doing alter the
relationship of individual fields to frames. In other words,
film projects cannot digitize both fields of every frame and
so cannot support the higher resolutions. You will therefore
need to create a new video project.
This done, return to your original
film project and select your sequence. Actually, it's never
a bad idea to make a duplicate of your sequence and use it
instead. If you don't plan on redigitizing your audio media,
you can delete the audio tracks from this duplicate. To be
extra careful, select your video track (or tracks) in the
Timeline Window and lock them by selecting Lock Tracks from
under Clip in the menu bar.
Now you're ready to export the
sequence. But if you think you can simply select the
sequence and export it as an OMF composition, you're about
to fall for the first potential trap in the process. When
moving a sequence from a film-based project to a video-based
project, you must first create an EDL.
Select EDL from under Output in the
menu bar. Inside the EDL Manager tool, select your list to
be in sort mode A (Record In). The actual format of your
list is not specific, so use either the CMX 3600 template or
another format with which you might be familiar. Select the
tracks for the list, keeping in mind that if you want to
make an EDL for multiple video tracks you must make a
separate EDL for each one. If you want to convert a sequence
with a single video track and one or more audio tracks, you
only need to make the one EDL with your tracks selected.
Then get your sequence and create your EDL. Double check
your list for any anomalies that might create future
problems in the converted video project.
Once your list is finished, save the
EDL as an OMF file by selecting Save as OMF under File in
the menu bar. Then quit out of EDL Manager and return to
Film Composer and your original film project. Close the
project and return to the main project and user selection
window. Open your new video project and create a bin. From
this bin, select Import from the File menu, choosing OMF
from the pop-up menu at the lower left of the Import window.
Select your EDL export in the left-hand window and add it to
the right-hand window. If you've made several exports for
multiple video tracks, select these exports as well. Click
Done and these exports will appear in your new bin as
sequences with accompanying master clips.
If you think you can simply redigitize
these master clips, you would fall for the second potential
trap in the conversion process. Instead, you must select
these master clips and delete them. This leaves you with
your sequence (or sequences) alone in the bin. Select the
sequence(s) in your bin, and then, from under the Clip menu,
select Decompose to create new master clips. Within the
Decompose settings window, select the length of the handle
you want on the clips and then select OK. This will give you
a new set of master clips, all with completely different
clip names. Don't let it throw you; these names are derived
from the sources assigned to your cuts from when you first
generated your EDL.
Now you can select these new master
clips and batch digitize. Almost. Make sure to first change
the pulldown switch on your Video Slave Driver hardware from
0.99 to 1.0. Video projects work exclusively with the
pulldown switch set to 1.0. It's not a bad idea to gather
your video sources and calibrate each using the Video Input
tool, making sure to save your settings with the same name
or number as the tapes are labeled. Within the Digitize
tool, don't forget to select your two-field high resolution,
such as AVR 77. Avid will now ask you to mount your source
tapes, and you're ready to batch away.
Once your clips are redigitized, play
your sequence to make sure you've digitized all media
correctly. If you don't like the clutter in your bin, select
your new master clips and move them to another bin. If
you've digitized for multiple video tracks, you can combine
them again by loading your Video 1 track in the record
monitor and then splicing the higher video tracks on top of
it. If you need to check the sync on your combination,
return to the original sequence in your film project and
take note of the timecode at a particular sync point. Then
verify the timecode at the same sync point in your video
project sequence.
One last note. If your sequence
includes titles created with the Title tool, you cannot
redigitize these titles as you did with your source tapes.
But you do not have to completely remake these titles from
scratch either. Using your original sequence in your film
project, make a note of the placement of these titles, or
print out an EDL of your titles track to use as a reference.
Then select each of the titles and export them as PICT
files. Switch to your video project and import these files
into another bin by selecting PICT in the lower left pop-up
menu within the Import window. Once you've imported them,
you'll need to cut them back into your converted sequence
and re-create the Fade Title settings from your original
project.
Robert Brakey is an assistant
editor currently working on "Bless the Child".
If you have any comments or feedback on this column,
or have an idea or suggestion for a future topic,
e-mail him. Please include the word "Avid" in the
subject of your e-mail.
Reprinted from
The Motion Picture Editors Guild Newsletter
Vol. 20, No. 4 - July/August1999
Guild
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