[FCP-L] Re: Semi-OT: Mac QT to PC WMV gamma settings

Is nobody getting the difference between display gamma and the gamma
curve used by the video editor and color corrector?

The two are very different.

I have speculated that Snow Leopard may move Apple to the common display
gamma used by pee cees. But when you send someone a Quicktime file,
you're color correcting to scopes (assuming people actually use scopes
these days) and Apple's Final Cut Studio is known to mess the gamma up
in Quicktime files.

Here is a workaround:

Apple ProRes decoder for windows induces a small gamma shift when you
import a ProRes Quicktime using Graphics. If you import as Video levels,
levels are even more wrong.

Even if you use Quicktime on your Windows application to export to image
sequence, the shift will be there.

This was tested using ProRes 1.0.

Exporting an image sequence on a Mac gives you the right levels.

So if you are trying to go cross-platform between a Mac and a Pee Cee,
you will want to export an image sequence and not a Quicktime file, then
import the image sequence and change it to an .AVI or a .WMV file in
Windoze.

--- In FinalCutPro-L@yahoogroups.com, "craigseeman" <cseeman@...> wrote:
>
> When I installed Snow Leopard the monitor default display changed.
>
> See this Apple KB article
> http://support.apple.com/kb/HT3712
>
> To better serve the needs of consumers and digital content producers,
Mac OS X v10.6 Snow Leopard uses a gamma value of 2.2 by default. In
versions of Mac OS X prior to 10.6, the default system gamma value was
1.8. Using the capabilities of ColorSync, the gamma value of 2.2 is
automatically applied and seamlessly transitions your display, images
and videos to the new gamma value.
>
> --- In FinalCutPro-L@yahoogroups.com, "oliverpetersvidy" oliverpeters@
wrote:
> >
> > > craigseeman wrote:
> > > This is much easier to do in Snow Leopard which
> > > now has the same gamma as Windows.
> >
> > I'm not so sure that it will really be any different. The gamma
change from what I can tell with SL is how the app displays the image,
not the display itself. For instance, the ACDs I have do not use 2.2 as
Apple's default gamma when I select the preset profile. You have to
create a profile that is specifically set to 2.2 gamma. I think the
difference is how QT X and FCP display files within their own UI that
has changed.
> >
> > - Oliver
> >
>

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