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Jeff Dugal
Superwhite
on Jul 10, 2008 at 1:22:04 pm

Anybody know how to render a quicktime with superwhite from AFX CS3? I need quicktime with 110 IRE !
Any combination I tried results in white clipping at 100 IRE. It doesnt seems to be a codec problem cause I tried some (Apple FCP Uncompressed 10 bit 4:2:2, AJA v210, None, ...)

MY computer:
Quad Core with OS 10.4.11
After effects CS 3
Final Cut Pro with KONA 3



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Topher Welsh
Re: Superwhite
on Jul 10, 2008 at 6:48:33 pm

I am not sure what you mean by superwhite but i know there is a gamma shift problem with quicktime when you are rendering out videos... check out Andrew Kramer's post here:

http://www.videocopilot.net/blog/?p=197

it deals with something that might be able to help...

sorry if it doesnt though...

Toph.

Topher Welsh
Head Editor & Motion Graphics
Emerald Downs Horse Racing
Television Department


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Jeff Dugal
Re: Superwhite
on Jul 10, 2008 at 6:56:55 pm

Thanks,
By superwhite I mean white above 100 IRE.

I digitized a clip in HDTV Uncompressed 10 bit via a Kona 3 card (Apple Uncompressed 10 bit 4:2:2 codec). This clip have superwhite (white above 100 IRE).
Export quicktime movie current settings.
Then importing it in AE.
After effects project setting 8 bits (or I even tried 16 bits) with no color management.
I render it in 1920x1080 (Codec Apple Uncompressed 10 bit 4:2:2).
Then going back to FCP, every color and levels (black and luma) is exactly the same except there is nothing above 100 IRE.
I tried reimporting the original clip directly into FCP and the superwhite is still there (means After effects is clipping "superwhite").



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Dave Fraser
Re: Superwhite
on Jul 11, 2008 at 4:07:50 pm

Hiya, not 100% sure i can help, but i remember watching a tutorial a little while ago about using 16bit or 32bit colour. it pushes whites further then 255 and blacks below 0, not sure if it'd work on a solid mind, but maybe worth looking into.

hope this helps.

Dave Fraser
Motion Graphics Artist
Big Button Media LTD
http://www.bigbutton.tv


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Jeff Dugal
Re: Superwhite
on Jul 11, 2008 at 4:18:31 pm

thankf, I already tried in 16 bits and 32 bits ... doesn't work.



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Darby Edelen
Re: Superwhite
on Jul 12, 2008 at 6:34:42 am

The only way that I can conceive of it working is in 32bpc with color management enabled using the HDTV (Rec. 709) working profile and rendering to a non-RGB codec. I'm still not sure if it works, but it's the only way I would expect it to... although there may be other color management methods that would?

Darby Edelen
Lead Designer
Left Coast Digital
Santa Cruz, CA


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