Norval Watson wrote:
> How can I transform full-spectrum color footage into monochrome and red?
> ie. retain any red color in the image but convert the other colors to 
> monochrome?

I'm not in front of my system, but I would suggest making multiple
overlaid tracks. Use the Hue saturation effect on the lower track with
saturation all the way down to give you a black & white image. Then on
the upper track, you essentially want an inverted chroma key (with alpha
channel so the lower track shows through.) Taking a guess, you might try
using Chroma key (HSV) and select the color directly 180 degrees
opposite to red on the wheel, then increase the threshold to near
maximum as you prefer.
If that doesn't work, you can try essentially creating a mask using
Chroma key to show everything but the red you want on a third track,
then using the Difference Key effect on this and the original track.

Hope that helps!

Sincerely,
Sean Pappalardo

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