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Color Space

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Scott SkajaColor Space
by on Sep 9, 2009 at 3:31:43 pm

I need advice...

I am doing some simple compositing for a client. The footage was shot on 35mm film. In telecine they output the color corrected scenes as standard def 720x486 uncompressed Quicktime files. The editor did an initial online with the color corrected scenes in his Avid. He then exported from his timeline only the scenes I needed in Avid Packed Codec compression. He exported each scene both as RGB and 601 color space. I have tried a myriad of color management options (including "None") on both the RGB and 601 files. When he imports my compositions back into Avid, the colors do not match exactly.

Any ideas what we may be doing wrong?

Mac Pro
Quad-Core Intel Xeon
Processor Speed: 3 GHz
Number Of Processors: 2
Total Number Of Cores: 8
L2 Cache (per processor): 12 MB
Memory: 6 GB
Bus Speed: 1.6 GHz
Boot ROM Version: MP31.006C.B05
SMC Version (system): 1.25f4

Scott Skaja
edit/design/animation
http://www.scottskaja.com


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Dave LaRondeRe: Color Space
by on Sep 9, 2009 at 3:49:52 pm

It might be Quicktime that's giving you fits.

Within the past year, Apple messed with QT's Gamma settings, changing them from something like 1.8 to 2.2. So if your editor has an QT version that's a little older, it could be the culprit. A visit to the Apple Web site and searching the discussions for the gamma issue may be well worth your while.

Whenever I run into this problem, I just fool with the Gamma... but I bet your standards are somewhat higher than mine.

Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Scott SkajaRe: Color Space
by on Sep 9, 2009 at 3:58:10 pm

when the editor brings my composited files back in, he wants them match color perfectly with the footage he digitized from digibeta.

Scott Skaja
edit/design/animation
http://www.scottskaja.com


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Dave LaRondeRe: Color Space
by on Sep 9, 2009 at 4:34:10 pm

Okay, so I did the search for you, looking for the terms quicktime and gamma. Here are the results:
http://forums.creativecow.net/search.php?q=quicktime+and+gamma&content=F&f%...

And here's a promising thread:
http://forums.creativecow.net/thread/2/961950#961956

And if the phrase "the colors don't match" means something else, some elaboration may be in order.



Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Scott SkajaRe: Color Space
by on Sep 9, 2009 at 3:53:51 pm

correction... in telecine the transfered footage was layed to a digibeta tape. Then the editor digitized that tape into his Avid Nitris DX using the Avid's 1:1 10 bit Uncompressed settings

Scott Skaja
edit/design/animation
http://www.scottskaja.com


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