Hey
First of all: it's possible to keep a controlled workflow with Quicktime
format, and there aren't any specific issues about 10 bit uncompress codec. But
there are mane other things:
1. Which application has generated those files? (Final cut, Avid or something
else), in which format (resolution)?
2. What is destination?
3. And very important question: what do you mean: "chroma shifts"?
Very often I notice that peoples confuse color shifts and gamma shifts; it's
not the same. Of course those terms are ambiguous, so to be clear:
It's possible that picture is gamma shifted ("brighter" or "darker"), while
hues of colours are not shifted, and vice versa. And of course: gamma as well
as colors hues might be shifted.
Some color and gamma shifts are quite predictable but it's better to make sure.
The oldest and the best way to check it out are color bars. Hues of the bars
are standarized:
60 deg- Yellow
180 deg. - Cyan
120 deg. - Green
300 deg. - Magenta
360 deg. - Red
240 deg. - Blue
If yours colors keeps proper values between application, which generates your
files and Nuke, you are lucky. But check it first if you can, and then we will
continue.
Best
Adrian
W dniu 2011-05-30 14:27:16 użytkownik Johan Boije <[email protected]> napisał:
And this is on OSX, Nuke 6.2v4
On Sun, May 29, 2011 at 9:46 PM, Johan Boije <[email protected]> wrote:
Normally I wouldn't go near quicktime but for reasons I can't control I'd like
to read Quicktime Uncompressed 10-bit YUV directly in Nuke. This will introduce
a distinct chroma shift so it's not possible. What's your experience with this?
Any solutions?
I Believe I've read numerous threads on this matter but didn't find anything
specific on 10bit uncompressed. I know it's complicated and that it probably
has to do with Nuke's "home-brew" of the quicktime reader. Normally I wouldn't
consider anything but file sequences in Nuke, or in the rest in my workflow for
that matter. But this time I have like a gazillion quicktime files that needs
to be treated and I'd prefer not to have to convert them elsewhere previous to
bringing them to Nuke.
What's your experience with this? Is it even possible to keep a controlled
workflow with any type of uncompressed Quicktime format? I've had a look at
ProRes before and that was problematic too with chroma shifts introduced.
I hate hate hate hate Quicktime. From the bottom of my heart. Hate it.
Sorry.... now I feel better.
Cheers,
J.
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