A common part of the motion-picture film production
workflow is scanning the film and encoding the frames into the Cineon
or DPX file format. The DPX (Digital Picture Exchange) format is
a standard format closely related to the Cineon format.
You can import Cineon 4.5 or Digital Picture Exchange (DPX) files
directly into an After Effects project as individual frames or as
a sequence of numbered stills. Once you have imported a Cineon or
DPX file, you can use it in a composition and then render the composition
as an image sequence.
To preserve the full dynamic range of motion-picture film, Cineon
files are stored using logarithmic 10-bpc color. However, After
Effects internally uses 8‑bpc, 16‑bpc, or 32-bpc color, depending
on the color bit depth of the project. Work with Cineon files in
a 16- or 32-bpc project—by default, After Effects stretches the logarithmic
values to the full range of values available.
Cineon data has a 10-bit white point of 685 and a 10-bit black
point of 95. Values above 685 are retained, but are treated as highlights.
Rather than abruptly clipping highlights to white, After Effects
interprets highlights using a gradual ramp defined by the Highlight
Rolloff value. You can modify the 10-bit white point and 10-bit
black point input levels and the output (converted) white point and
black point levels to match your specific footage items or creative
Use a project color depth of 32 bpc when working with Cineon
footage items so that highlights are preserved, in which case you
don’t need to roll off the highlights.
When you choose DPX/Cineon Sequence from the Format menu in the
Output Module Settings dialog box, you can then open the Cineon
Settings dialog box to set output options. Choose whether to output
DPX (.dpx) files or FIDO/Cineon 4.5 (.cin) files in the File Format
section of the Cineon Settings dialog box.
After Effects provides three basic ways of working with the colors
in Cineon footage items: