help with luminance mask

kairosmatt wrote on 1/5/2009, 9:40 AM

I have a logo that is on a black background and need to get rid of the background.

I used mask generator in luminance mode and by changing the levels can get rid of the black no problem. But then the text is just white.

What is the best way to keep the colors but get rid of the black?

Thanks
kairosmatt

Comments

FrigidNDEditing wrote on 1/5/2009, 9:49 AM

Hi Kairo,

You need to put the footage that you made the mask on, over the the original footage, and then set the top track to a multiply mask, and the bottom track should have the video footage that you want to have the text showing through, and then there should be a track below that, that is with all the footage that you're not applying a luminance mask to.

Seems that they could just make it so that you check a box, and it applies the luminance mask to that very clip, but most of the time, I use it to show through other footage on a pre-existing clip or something to that effect, so the way it's designed for the majority of stuff it's used for is probably best.

the main question i have, is what are you doing that you can't just make the text with a transparent background?

Dave

kairosmatt wrote on 1/5/2009, 10:04 AM

HI Dave,
Thanks for the replay. I think I have it the way you say (a total of three tracks) and now the text is right but everything else is black! When I move the middle track (the one with video footage that I want to show through) then the mask is filled with the bottom track (all the footage that I don't want to apply the luminance mask to) but the rest of the screen is still black. I think I am missing a simple step here!

As far as why I couldn't make the text with a transparent background: I need to reboot to XP from Vista to get to photoshop, and then I was curious about doing it in Vegas and decided to try and learn something today (with a little forum help-of course!).

Thanks for any further advice.

kairosmatt wrote on 1/5/2009, 10:06 AM

Oh wait! Just figured it out!

I forgot to make the middle track a composting child. Bam! Done.

Thanks Dave for getting me on the right track!