Sur you can make this easily in AE, but you be surprised what you can do in Premiere.
You can make the shape with the Pentool in the Titler.
Then make the shape pure white and Filled Bezier and use this as a track matte.
Set you footage on track 1 and copy/paste it to track 2.
Set the matte on track 3.
Add the Track Matte Effect to track 2 and set it to track 3.
Add an Blur or Mosaic effect to the footage in track 2 and blur it out.
Set a keyframe for position for track 2 on the 1 and last frame.
For the in between you set keyframes moving the matte around over time to cover, in this case the face, in the program window.
If you try this in AE, definitely give Mocha a shot; it's a far superior motion tracker than the one built into AE (planar versus point tracker). It takes a little getting used to, but once you do, you'll never want to use a point tracker again--though that's not to say that the AE tracker doesn't have its purpose.
Mocha is included with AE, by the way; it's a standalone program that you import your clip into for tracking. You then move the tracking data from Mocha into your AE comp.
Thanks for the tip, Colin! I'll give that a try next time I have to do
motion tracking... not being one who tends to load his videos with FX,
though (primarily cause I don't have time to get fancy), can you give me
some scenarios where I would want to use motion tracking other than blurring
> If you try this in AE, definitely give Mocha a shot; it's a far superior motion tracker than the one built into AE (planar versus point tracker). It takes a little getting used to, but once you do, you'll never want to use a point tracker again--though that's not to say that the AE tracker doesn't have its purpose.
I find that mocha is overkill for something like blurring a face, license plate, or logo---i.e., situations in which your track doesn't need to be perfect. It's a bit faster to do the work all within After Effects with the point tracker. But I _always_ use mocha when doing motion tracking for precision compositing.
Maybe so, but I've had such miserable luck with the AE tracker forgetting what it was tracking and going off on a random search that I rarely give it a chance any more. Truthfully though, most of the tracking I'm doing requires much tighter tolerances, e.g. screen replacements, that Mocha is about the only thing I'd try any more for something like that.
Okay, so I am certain I am completely missing something extremely vital BUT here's my problem:
This works perfectly, except the matte is working exactly the opposite of what I am trying to acheive. IE Instead of it allowing everything look look crisp and clean EXCEPT where the matte is keying (and having that be blurred, mosaiced, etc) INSTEAD it is showing the entire frame as blurred with the exceptiong of the track matte key which looks clear as day. Sort of draws attention to the face instead of hiding it. Anyone can help with this I'd greatly appreciate it. CS6 Premiere Pro, incidentally.
In CS6 there is an even easier way of blurring out parts of your video. I think this workflow is very nice since it doens't involve track mattes or duplicating your footage anymore! Everything is done with just a simple shape +adjustment layer!
You can check out a quick one minute explanation of the new process here: