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RGB Timeline issue
Hi all,
I have an image created in Adobe Illustrator which has diagonal green lines going across a white background. The amount of lines are quite a few and the white is barely seen.
However, the RGB value is important here. When the file is imported into FCP it comes into the viewer with the correct RGB value. When the file is placed onto the timeline (720×576 Anamorphic, DV-PAL codec) the RGB value appears to become a lighter shade of green. As this RGB value is particularly important to corporate guidelines this shade is not acceptable.
Anybody come across this problem or have any idea of how to remedy it? Could it be a codec or field issue?
Cheers
Danny
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2 Replies
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might it be that dv codec has half the color of other codecs. RGB is 4:4:4 Digibeta is 4:2:2 and dv is 4:1:1 or 4:2:0 (depends i guess on who makes it). this might not apply to AI but in after effect you can cheat more vibrant colors by changing the composition from normal 8bit comp to a 32bit comp then rendering the file back to 8bit. this might give you the values you need..
del
you cant hear my inner voice scream… can you..?
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I would guess that the color shift is coming from the fact that DV doesn’t use RGB color space. Instead it uses YUV. The shift is probably how FCP translates RGB to YUV.
To test this, create a timeline with the codec set to animation or if you have the AJA codecs installed, use the 10-bit RGB uncompressed codec. Then drop the file into that timeline. Did the color shift?
To get around this shift, I would either take the file into After Effects or Photoshop CS3. Both of those have color management. The new version of Illustrator might have it to, but I don’t know for sure. Change your working color space to YUV.
-Russ
Russell Lasson
Kaleidoscope Pictures
Provo, UT
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