If you can isolate the blue lights well in the Secondary Color Corrector (using the eyedropper selection and the mask adjustments) you can change the color to red easily by rotating the hue. If there is any overexposure of the lights you may have problems with the clipped areas and have to apply another round of masking and correction. Reflections of the blue on the car should be able to be handled with the luminance and saturation adjustment of the mask in the secondary color corrector.

cool thanks! I'll give it a secondary a try. Never used it before.

Worst case: BLUE Alarm lights might be a unique artistic choice :D

Don't know if you possibly have these plug-ins already, but NewBlue FX Essentials V2 has a plug-in called "color swap" that works pretty well for me. Sometimes I've found that I have so many plug-ins that it's difficult to keep track of all of them.

I have so many plug-ins that it's difficult to keep track of all of them

never a truer statement made. i sometimes simply give up trying to remember what plug ins i used, or need to use to get a desired result - nb, bcc, genarts, to name a few.

Channel Blend.

Bob,

I tried and failed. Looked more like a 60's, negative colored effect - but I don't know how to use it either.

But it's okay because everythig else is awash in red anyway, so the Blue Lights makes for a cool accent.

If you're really determined, you can import a still image sequence to a Photoshop Action. The results will be good depending on your skill, but motion compensation in the color channels will probably be lost.

If you want to upload the clip somewhere, I should have time to play with it over the holidays.

ima stick with the blue to offset all the red, but I may upload tonight cuz maybe you guys can teach me to use SECONDARY better. All it changed was a tiny sliver I had selected, but when I stretched the range out, things got phychodelic.

[I]"I tried and failed. Looked more like a 60's, negative colored effect - but I don't know how to use it either."[/I]

Using the channel blend you can simply swap the red and blue channels.
Now that should make your blue light red very nicely. The problem will be anything other than the light in the shot.

You could try using the Secondary Colour Corrector or a mask or both to isolate just the light on it is own track and then use the Channel Blend FX to change it from blue to red but that's a lot of work and could still fail. One problem that's going to add to the grief is the light on the police car has probably clipped the blue channel in the camera i.e. part of the light is actually recorded as white or close to it.

Bob.

wwjd, try this process:
Apply the Color Corrector (secondary) on your clip. Click the "select effect range" button in the plugin dialog and click the eyedropper on the most saturated blue of the light.
Now click "show mask" and you should see a very rough white patch around the color you selected. Do NOT touch any of the settings under "Limit Hue" yet.

Adjust the Limit Luminance Hi/Lo and Limit Chrominance Hi/Lo controls until your mask takes on the rough shape of the light. Then unclick "show mask" and at the top of the dialog box adjust the "Rotate Hue" slider until you have the color of the light you want. It still won't look great - but....

Then, with the mask still turned off, adjust the "smooth" sliders of Limit Luma, Chroma and Hue which will feather the mask a bit. If you still have problem areas, adjust ONLY the "width" slider under Limit Hue - shouldn't take much.

As Bob and I have said, if you have a clipped color channel that has gone to white, you'll have to apply another mask layer to handle that. Good luck.

footage:

https://copy.com/BrELK2zWdZXPcZUL

(turn sound off to ignore my whisper singing... I was bored)

I try the ideas above, but I do think the blue looks cooler now :)

well, closest I got was CHANNEL BLEND preset called RED ONLY, and that worked perfect. AND I used a plugin I had never used before! hahahah.
I think I could pull it off now with masked off extra tracks, but everything else is already awash in my red fill light, so I'm leaving the blue for contrast :)

Sample video: https://dl.dropboxusercontent.com/u/8841527/Revolving%20Red%20Light/Revolving%20red%20light.mp4

V10 Project file: https://dl.dropboxusercontent.com/u/8841527/Revolving%20Red%20Light/Revolving%20red%20light.veg

I put the clipping to white back in, just to make it look "authentic" :)

HTH

Bob.