Lets start with an easy solution:
You may be able to do a simple "Multiply" transparency mode. It will use the darker parts of layer to darken the pixels under it. It might work for what you're doing, depending on your logo.
If not, try this:
If the logo is on a white background, you can do a couple of things:
Effects / Key / Luma key and select "key out brighter" This will delete pixels from your logo that are a certain brightness. You can adjust parameters to fit to your liking. You can also feather the key to smooth the jaggies.
Or you could try color key.
the logo is very bright i made it my profile pic so you can see what we are dealing with. I have the entire outline I want roto-brushed. Can I cut that and paste it to a new composition some how? Then I have all the logo I want and the background should be blank just like placing txt correct?
You can set the luma key to just remove pure white, and if your logo doesn't have pure white on the inside, you should be ok. Set threshold at 254 and see how it looks.
Otherwise, I would maybe cut out the bg in Photoshop. Its a bit of work, but it's a logo, so you only have to do it once.
so I cant take what I have roto-brushed and paste that to the video and adjust opacity of clip layer in PP? Caseyinhd I will try that now
Well, if it's a static logo, then you don't really need to rotobrush the image. Rotobrush is really more for rotoscoping video.
Once you get a transparency you can render out of AE with an alpha channel and put it on an upper layer in Premiere. Then, you can adjust that layer's opacity in Premiere.
You should even be able to render a .png from AE or Photoshop and put the logo over the video as an image. It doesn't have to be a video if it's just one frame.
I went to photoshop as it is prob the best way in the long run... prob is CS6 I cant find the magic wand tool that would normaly just select everything but the white BG... know how to do that? teaching myself everything thank you for all the help
4th tool down in tools pallete
It's defaulted to "Quick selection" which kinda looks like a paint brush, and may also do the same thing or u can hold the mouse down and get to the magic wand.
Hope It works for ya.
did not work. when I select all I want with the quick select tool, hit ctl+X to cut it, it extract what I want. I have unlocked the image.
delete... .I got it haha
This page introduces all of the ways that you can composite layers together, and then links to resources for more information about each:
Since you're new to After Effects, I strongly recommend that you begin here are work your way through the basic getting-started materials:
Doing so will save a lot of confusion and headaches later.