Keyframe masking advice, please

Maverick wrote on 9/29/2013, 4:35 AM
I have a shot of someone walking across the frame which I am using as a transition. Basically as he walks from right to left the next shot comes in from behind him. This happens over 31 frames and I have painstakingly set up the relevant mask for each frame and it has worked well.

But I decided to add some feathering to the mask and changed each one to 'Both' and 10% but even this is a bit too much (just a case of experimenting till I get the look/feel I want).

My question is: is there a way of changing the feather setting globally within an event rather than having to select each one in turn which is very time consuming?



Grazie wrote on 9/29/2013, 4:40 AM
What happens when you Select All KFs and apply?


Grazie wrote on 9/29/2013, 5:42 AM
Nope. NG


Maverick wrote on 9/29/2013, 7:14 AM
Yep - glad it wasn't just me ;)
larry-peter wrote on 9/29/2013, 11:45 AM
I would love to know a solution to this too. The lack of independent "tracks" for keyframing the various parameters of masks is why I go to AE so frequently. This particular issue with feathering is extremely annoying. It should be able to be keyframed separately from motion.
TheHappyFriar wrote on 9/29/2013, 4:55 PM
Is this a straight line transition between one point on top & below in the pan/crop mask?

If so, use a linear transition and use a transition envelop to control the speed and transition keyframes to adjust the specifics.

Seeing what you're doing would make it easier to help.
Maverick wrote on 9/30/2013, 1:29 PM
Not sure how best to describe what I am doing so I thought a couple of screen grabs of the Video Event FX window may help illustrate:

Does that help?
TheHappyFriar wrote on 9/30/2013, 1:46 PM
Ok, I see. AE can automatically do this now I think, but not sure.

Yeah, you'd have to manually change the keyframe settings for each frame to do this.

I don't think it would look good though. Your mask is right on the edge of the person, any feathering you'd do would either let the background bleed in or have the person bleed out. When I've done this I've always wanted a sharp edge, from the looks of it you do too.

But, it's Vegas, and you don't NEED to feather each keyframe to get a blur. :)

Apply the Chroma Keyer to the event with the mask on it. Check the box "Show Mask Only". This make the person solid white and whatever it keyed out, transparent. Apply some blur via the Chroma Keyer plugin. Put this event on it's own track (new I'd assume). Call this Track A.

Duplicate the new track Call it Track B. Disable the pan/crop mask & the chroma keyer FX on the event with the person. Make sure this track is above Track A.

Make Track A a "compositing child" of Track B. Change Track B's Compositing Mode to Multiply (Mask).

Now you get a blur at the edge of your mask.

Maverick wrote on 9/30/2013, 2:14 PM
Just had a quick play using your instructions...

What I did find is that it only worked if Track B's Compositing Mode was set to Multiply. Have I misunderstood something?

I now will have to undo all those Feather settings I made previously ;)

Thanks for the help.
TheHappyFriar wrote on 9/30/2013, 8:35 PM
Make a typo, track B needs the multiply (mask). Fixed.

But it works, no? :)
Maverick wrote on 10/1/2013, 7:17 AM
Yes, it works just great. Thanks for that :)
Steve Mann wrote on 10/1/2013, 8:11 AM
Could you post a few seconds of A & B and let us have a go at it?
Maverick wrote on 10/1/2013, 12:15 PM
Here's a zip file containing ttwo events. The first has the man walking past, the second is the event to show throw behind him and the Result file is my attempt.

Feel free to play as I'm sure there is so much I can learn from the more experienced here :)