It's rather complicated and a little hard to explain in a brief forum post. But, if you're interested, you can find detailed, step by step instructions with illustrations in my book. (http://Muvipix.com/CoolTricks)
First place a copy of the clip on both Video 1 and Video 2. Then use the Titler to create a white dot on Video 3.
Use motion path keyframing to size, position and follow the person or object you want to blur around the video frame.
Apply a Gaussian Blur to the video on Video 2.
Apply the Track Matte to the video on Video 2 and, in the Properties panel, set the Matte to use the clip on Video 3 for reference.
The Track Matte will show your video as only blurred where your white dot is located. The rest of the video in your video frame will be seen as the video on Video 1.
Hope that helps!
Thanks so much, but you're dealing with a real beginner...where do I find all these weird and wonderful things...Titler, track matt, etc? One I know where to find them, I may be able to figure out the rest. Sorry for my ignorance!
As Steve says, it takes longer to write about it, than to do it.
This ARTICLE covers the basics, though the subject of this was to "highlight a movig subject." In your case, instead of adjusting, say the Contrast & Brightness, you would Blur (or use the Moasic Effect) on the duplicate Clip, and then limit that to just the face, license plate, etc.
Good luck, and hope that helps,
And of course my book gives you illustrations that show you how to work all of these tools in detail.
Very nice work, Geoff! It makes the basic principles easy to understand.
The Effects Mask would work similarly.
Where things get complicated is when you're working with video and you're trying to follow a moving object around the video frame with a blur or effect.
Because I still work with PE7, I don't have the ability to use motion
Sure you do, Geoff. It's been there since version 1.
You just keyframe the position of graphic you're using to define your track matte.
I appreciate that particular method but I was referring to the auto
follow method introduced in PE8 where a moving object can be identifies
and a title or arrow can be made to folow automatically.
You're right, Geoff. That particular feature was introduced in version 8.