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Use NTSC-safe colors
Posted: Tue Nov 28, 2006 3:31 am
by J. Baker
It seems this option doesn't export correctly. It sets highest values to 233 and lowest values to 12. When they should be 235 and 16. Also colors that are already correct, in the safe NTSC range, also get changed when setting this option. This gives you a totally different color field then the one you were shooting for when you created your project.
So, how to fix it? Just choose the colors yourself like you usually would but just don't use values higher then 235 or lower then 16. And make sure to uncheck this feature. Your final product will be vivid, like it was suppose to be, when you created it. While staying in the NTSC color range.
Example, if you choose yellow RGB(255, 255, 0). Just change it to RGB(235, 235, 16).
Re: Use NTSC-safe colors
Posted: Tue Nov 28, 2006 5:42 am
by Rhoel
J. Baker wrote:It seems this option doesn't export correctly. It sets highest values to 233 and lowest values to 12. When they should be 235 and 16. Also colors that are already correct, in the safe NTSC range, also get changed when setting this option. This gives you a totally different color field then the one you were shooting for when you created your project.
So, how to fix it? Just choose the colors yourself like you usually would but just don't use values higher then 235 or lower then 16. And make sure to uncheck this feature. Your final product will be vivid, like it was suppose to be, when you created it. While staying in the NTSC color range.
Example, if you choose yellow RGB(255, 255, 0). Just change it to RGB(235, 235, 16).
My understanding of how the filter works is it compresses the entire colour range of 0-255 into legal yuv range of 12-233 (or 235). The actual formula for converting colour is not just a max 235 RGB value but the combined yuv value: yellow for instance will go illegal at a lower value than 235.
The way I use Moho is to leave my colours 255 for web and online video and use the MTSC for TV: That way I have a hi contrast vesion for web/3gp and a lower contrast version legal for TV. Persona;;y, I like the dynamic reduction facility - colour limiting the way Combustion does it only affects the illegal high colours and does not affect the overall colour balance. Colour compression does.
If you manually set all your colours TV safe, then there is no reason to use the NTSC colour filter.
Maybe Mike can confirm that is how the filter is construted.
Regards
Rhoel.