Silicon Imaging SI-2K User Manual page 48

There are two important columns of note in the LOOK LIBRARY, the REC
and VIEW selection columns. When the ENABLE SEPARATE PREVIEW LUT
check-box is selected, this allows the end-user to select a different .look file
for recording and embedding as metadata in the header of the AVI/QT file,
versus what will be viewed on screen. Typical use of this application is for us-
ers who want to record with a LOG or RAW LUT (so that files that are on-disk
when they are played back or imported into editorial or color-correction have a
LOG LUT applied), but want to view a „normal" print-style LUT in the preview
window during shooting. This separation allows the record LUT to not have the
effects of the preview LUT „baked" into the LUT that is applied to the metadata
of the recorded AVI/QT file. It also aids workflows that are based on a film-
calibration system that requires Cineon LOG input. In this situation, a user will
set a Cineon-style LUT for the record LUT, but preview with a LUT that has a
reverse Cineon curve. The cinematographer, director, and any other viewers
will see the „end-result" on-screen during shooting, but the recorded files will
have the appearance of a Cineon-calibrated file. When these files are imported
into a system with a proper Cineon-reversal LUT, they will appear „normal"
again. If the user were to apply the preview LUT to the recorded files, it would
interfere with the Cineon-reversal LUT in the post editing bay that was expect-
ing Cineon-LOG input. Should a situation like this occur though, because the
LUT's are metadata, they can be swapped out in post to calibrate the files to
whatever standard is needed.
When swapping between LOOKS A, B, C, and D, the image in the preview and
on the external monitor will change live with each selection, aiding the user in
selecting the correct LUT. After the selection process is complete, the user can
press the DONE button and proceed with recording.
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LookControl
 SI 2K Manual