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Move mask with Video/Object? [ANSWER]

Posted: Sun, 22nd Oct 2006, 2:48pm

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doone128

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I've searched for a solution to this, but I cannot find one anywhere. Basically, I'm creating a mini-film within V-lab. I've decied to cut a few seconds out of the middle of it within V-lab So I split the video and cut it out. Fine.
I've then selected the video clip after the cut point and dragged it a few seconds to the left. I thought all had gone well until I rendered it and all my masks were out of sync. It seems that when you move an object left or right on the timeline, the mask associated with that object doesn't move with it. Is this the way V-lab should work or am I doing something completely wrong here?
Please help!
Posted: Sun, 22nd Oct 2006, 10:13pm

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doone128

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Anybody else experienced this?

....Anybody?
Posted: Mon, 23rd Oct 2006, 12:13am

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Multiwagon

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When you move the ovject the mask should move with it. Look at your time line and see if the keyframes for the masks move too. If they don't there's your problem. You will have to move those too. If not then I don't know what the problem is.
Posted: Mon, 23rd Oct 2006, 6:34am

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doone128

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The keyframes for the masks don't move, although everything else about the object does. This can't be right, surely?
Posted: Tue, 24th Oct 2006, 10:47am

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Multiwagon

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The you can either remask everything or drag each keyframe to where you need it by hand. Its up to you.
Posted: Tue, 24th Oct 2006, 10:55am

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doone128

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Multiwagon wrote:

The you can either remask everything or drag each keyframe to where you need it by hand. Its up to you.
Yikes. I was kind of hoping that the masks should be moving with the object. I suppose I'll just have to muddle around moving each keyframe. Seems a bit longwinded to me though.
Thanks for the reply.
Posted: Tue, 24th Oct 2006, 7:49pm

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Multiwagon

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Sure dude. No problem
Posted: Wed, 25th Oct 2006, 8:17am

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Cogz

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I think perhaps you've confused garbage mattes with masks. If you check out this video masking tutorial:

http://fxhome.com/support/vidtutes/?t=3&f=%2Bcat%3A1&cat=1
Posted: Wed, 25th Oct 2006, 2:02pm

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doone128

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Cogz wrote:

I think perhaps you've confused garbage mattes with masks. If you check out this video masking tutorial:

http://fxhome.com/support/vidtutes/?t=3&f=%2Bcat%3A1&cat=1
Hi Cogz. I get the difference between masks and mattes, but I don't understand why I have to move each keyframe of my mask. Try the following to see what I mean:

1. Stick a bit of video footage into Vlab
2. Add a particle effect and use a mask with the particle effect to make it appear behind an item within the video. Animate the mask with the video to ensure that you get a clean mask with a few keyframes.
3. Now move the video a few frames to the right.
4. Now move the particle object a few frames to the right, in line with the new video stating point.
5. If you expand the particle object now, you will see that all of the keyframes have moved to the right as well *apart from the mask*.

Surely this can't be right?
Posted: Wed, 25th Oct 2006, 2:07pm

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Simon K Jones

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Rating: +1

The thinking with that is that, even if you move your effects, the object below is likely to be in the same place, so you're going to want your mask to still match up in its original position.

I can see your point of view as well; both approaches are valid. Hopefully it's not too inconvenient to move your keyframes. Generally it's advisable to position your pieces carefully before starting to do masking, I suppose.
Posted: Wed, 25th Oct 2006, 4:46pm

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doone128

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Tarn wrote:

The thinking with that is that, even if you move your effects, the object below is likely to be in the same place, so you're going to want your mask to still match up in its original position.

I can see your point of view as well; both approaches are valid. Hopefully it's not too inconvenient to move your keyframes. Generally it's advisable to position your pieces carefully before starting to do masking, I suppose.
That's fair enough. It's just that I wasn't actually planning on the change that I made, it was a quick decision to try and cut some unneeded footage out to stop my film being mega-boring!
It would be nice to be able to move the masks with the object if you wanted to though, maybe by holding down CTRL while you drag it or something.
Ah well, looks like my night is taken up with moving and lining up keyframes one by one! Erk!
Thanks for the replies guys. It's greatly appreciated.