Re: [Avid-L2] Re: OT: FCP and color levels

Could it be the infamous gamma shift in QT. 1.8 was the value but bumped up
to 2.2 on snow leopard systems to match the rest of the universe.

On Wed, May 12, 2010 at 2:16 PM, Oliver Peters <
oliverpeters@oliverpeters.com> wrote:

>
>
> Job,
>
> > Posted by: Job ter Burg
> > Where should these be located?
>
> User Prefs > Editing > Import Still/RGB Video Gamma
> Although I don't think it will change anything on this file if it is
> uncompressed. What is the actual codec? All uncompressed isn't equal. For
> example, there have been issues with levels in older AJA and BMD codecs.
>
> > So that basically means that FCP cannot handle properly leveled QT video?
>
> I'm not sure I would go that far, but it's codec dependent. I've seen
> differences in levels between what was captured through a card (KONA) and
> what was brought in from somewhere else. I do know that in the testing I've
> done, in which I tried to perfectly roundtrip a 0-255 grayscale chart, I
> couldn't get any combination that was right. In all cases, the video was
> either scaled or clipped at the top. You might try a 10-bit uncompressed
> timeline and render that to see if the results are any different.
>
> Part of the trouble, is that every place you monitor the computer file is
> affected by passing through QT. That's why I say, SDI from the BMD output
> would be the only valid measurement.
>
> I'm not sure Terry's suggestion to add a CC effect will work. Sometimes,
> when I've done this, the RT result is correct, but the rendered result is
> clipped.
>
> - Oliver
>
> [Non-text portions of this message have been removed]
>
>
>

[Non-text portions of this message have been removed]

------------------------------------

Please donate to the Red Cross to help those in earthquake ravaged Chile: http://tinyurl.com/y8pgceq

Search the offical complete Avid-L archives at: http://archives.bengrosser.com/avid/

Yahoo! Groups Links

<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/Avid-L2/

<*> Your email settings:
Individual Email | Traditional

<*> To change settings online go to:
http://groups.yahoo.com/group/Avid-L2/join
(Yahoo! ID required)

<*> To change settings via email:
Avid-L2-digest@yahoogroups.com
Avid-L2-fullfeatured@yahoogroups.com

<*> To unsubscribe from this group, send an email to:
Avid-L2-unsubscribe@yahoogroups.com

<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/