Multiple masks

Blood Rayne · Post by **Blood Rayne** » Mon Apr 21, 2003 4:36 pm

Hi, I'm sorry if this has been asked before. I want to know how to put multiple masks on a black backround each playing a different clip. I can get one to work but I'm not sure how to make them play at the same time.

What I want is to have a vertical rectangle starting from the left and have 3 more of them fade in on the beat. This is in Premeire by the way. I would really appreciate any advice.

klinky · Post by **klinky** » Mon Apr 21, 2003 6:54 pm

I am not exactly sure what you want to do

Is it something like this :

Each of those rectangles would have a different clip playing and they would be fading in and out with the beat, or they would just fade in on beat or something like that?

~klinky

Blood Rayne · Post by **Blood Rayne** » Mon Apr 21, 2003 7:24 pm

Yes that's basically what I want. Although the rectangles would be bigger (not that it matters) and they would fade in on the beat. I can get the one on the left but I'm not sure how to play all four clips at the same time and have them masked. Or maybe you can do something other than masking?

trythil · Post by **trythil** » Mon Apr 21, 2003 8:01 pm

Blood Rayne wrote:Yes that's basically what I want. Although the rectangles would be bigger (not that it matters) and they would fade in on the beat. I can get the one on the left but I'm not sure how to play all four clips at the same time and have them masked. Or maybe you can do something other than masking?

Something tells me you want to do something like this:

(Hey, neat, I got to plug my own vid, and have it make sense in the context of the thread!

)

Anyway:

There's a number of ways you can accomplish that effect. With Cinelerra, I just set individual image masks across four tracks and faded them to the beat.

With Premiere you may be able to do the same thing, but I'm not quite sure how Premiere's mask capabilities are. One alternative that you might want to pursue, should the mask option not work, is to create the four masks in e.g. Photoshop and then just fade them from there.

Synthangel · Post by **Synthangel** » Mon Apr 21, 2003 8:07 pm

...you use VirtualDub trythil? Cinelerra and transcode not good enough for you? =P

trythil · Post by **trythil** » Mon Apr 21, 2003 8:08 pm

Synthangel wrote:...you use VirtualDub trythil? Cinelerra and transcode not good enough for you? =P

I use whatever is best for the job.

klinky · Post by **klinky** » Tue Apr 22, 2003 12:15 am

Here's what I came up with:

sorry for the poor quality, it's a gif after all

This was made using the same Track Matte on three clips in Premiere.

I first made this matte in photoshop.

It's a simple rectangle path, I converted to a 'selection' with a feathered edge of 20. Then filled with white paint.

It was saved with a transperant background. I imported it into Premiere. Set it's transperancy to Alpha Channel. Then keyframed the Transform effect under Perspective to animate the matte going acorss the screen.

.

From there, I exported as a uncompressed avi. Then imported it into a project where I had three images(though you could use clips as well). I setup the images transperancy to "Track Matte". Then placed the animated matte on the track above each clip. Each clip with it's matte is offset about 1second from the perevious clip. If they were all together they would overlap.

Once rendered you get the finished project that was seen above.

~klinky