cropping mask not working right

TYU wrote on 6/5/2007, 2:55 AM
I use cropping mask often to replace items in older videos.

When I use a positive mask and same mask but negative I get a border. The positive mask covers a rectangular area and the negative everything else. It's the same saved mask.

How do I fix it? I tried different feathering options to no avail. My video is simple text & solid color background in all videos (just instructional videos).

The only laborious workaround is to create both mask by hand and enter exact y,x positions to the mask corners.

Comments

dsf wrote on 6/10/2007, 10:18 PM
When I use a positive mask and same mask but negative I get a border

When you say "cropping mask" do you mean the cookie cutter? If so, you have checked to see that the border option is set to zero? Or is it a problem with the pan/crop tool?
Grazie wrote on 6/11/2007, 1:30 AM
Track 1 - Instruction Text (yes?)
By employing Track Motion, to position your Text Media, you can make this up in various ways; blocks to right or left; rolling upper, middle or lower 1/3 . . .

Track 2 - Instructional Video
This is the main body of the work

Why are you using masking at all? There just HAS to be a reason. I'm listening.

Grazie

farss wrote on 6/11/2007, 4:27 AM
I think what the guy has is this:
Instructional video with text over a plinth (lower third thingy).
He wants to replace the text in the old video.

So what he's trying to do is make a hole in the original video to remove the old text and plinth and make the new text and plinth the same size so it fits into the hole.

Now he doesn't need to do that of course. He just needs to mask the plinth on an upper track so it covers the old one and put the new text on the track above all that.

Sounds simple in theory but having done this I can tell you it isn't!

a) The old plinth might have had feathered edges.
b) The old plinth / super fades in and out.

My advice in either of those cases. Don't try to match it, just smoother the old bugger. Expect to have to replaces ALL of the stuff too, otherwise your pristine new stuff will stick out like dogs danglies. You can give it decent shot by adding some gunge to the new stuff with noise or whatever but I could never get it to look quite right and gave up trying to be too creative.

Bob.
Grazie wrote on 6/11/2007, 5:05 AM
oh . . .

However, still the same appaoch though, using your techincal approach of "smother the bugger" ! Howebver STILL no masks. Just fresh and place? No?

farss wrote on 6/11/2007, 5:44 AM
Well you might need some sort of mask to create the back ground for the text. Just a 4 point bezier to create a rectangle, might need featherd edges. So long as it's larger than the original nothing critical really.

Of course until TYU gets back to us and in the absense of a global Vulcan mind meld we could be way off beam.

Bob.
TYU wrote on 6/11/2007, 12:22 PM
Feathering does not help. I have fade ins and out and the feathered parts show.

The only way seem to create a two masks which don't overlap.

Thanks your tips.

I have Vegas 7e.
farss wrote on 6/11/2007, 2:04 PM
We could probably help better if we knew more about what you're trying to do.

Bob.
Chienworks wrote on 6/11/2007, 3:30 PM
From reading your initial post, i have a suspicion that you only need one mask. I don't see any reason to create a "negative" mask as well. Mask the upper track containing the overlay, and whatever is on the lower track will show through around that overlay automatically. No need to mask that track.
TYU wrote on 6/12/2007, 12:18 AM
I need only a (positive) mask for the upper video track when there are no effects. But when there is, say, fade out both tracks will "show through" unless they are masked separately.
farss wrote on 6/12/2007, 12:50 AM
Struck this problem myself more than once, the super fades in/out to reveal what's below and your replacement super you want to also fade in/out. Problem is as it fades in/out it reveals the old super.

Simplest fix. Make the new super a little longer so it's at 100% opacity before the new super starts to fade in and the opposite for a fade out. Doing it this way is dead simple and no one ever counts how long a super is on for.

One exception of course, if you have ajointing supers fading in/out then there's no wiggle room. In this case you might have to get a little creative. Here's one way to try:

Use the Gaussian Blur FX, masked to just the plinth, to 'erase' the old text. You'll probably do better with more in the H direction than the V direction. You can then just add new text over the top.

Bob.