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EFFECTS: How do I blur a face or an object like in Cops?
Posted by: Michael Horton (IP Logged)
Date: October 31, 2006 12:38PM
Q. How do I Blur a face or an object so I can hide its identity?
From Michael Horton
Most likely answer and one way to do it:
1. Double click the clip to load it into the Viewer
2. Duplicate your clip on V2 by holding Option and Shift while you drag the clip upwards. This will produce a copy of the clip in perfect sync with the footage below it.
3. Turn off the track visibility light on V1. (makes it easier to see your changes)
4. Apply a mask shape filter to the clip on V2. (It's in Effects > Video Filters > Matte > Mask Shape)
5. Click the Filters tab at top of viewer. Scale your mask using the vertical and horizontal sliders to fit what you want to mask. You can move the mask shape anywhere on the clip by selecting the cross-hair button next to "Center."
NOTE: if you are masking a face choose OVAL from the Shape pop-up button.
6. Apply a Gaussian blur filter to V2. (It's in Effects > Video Filters > Blur > Gaussian Blur.) Adjust the blur to suit your taste by using the Radius slider.
7. Turn back on Track visibility light on V1.
8. Render
Here is a QT movie by Ripple Training that pretty much describes what is written above:
COPS
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But how do I mask and track a MOVING object?
Most likely answers:
This is called Rotoscoping or better, Motion Tracking
Here is a down and dirty tip from the pro apps tips web site
Blurring faces in FCP
Also:
From Loren Miller
A Motion Tracker is best, but if you don't have it available, just use a Marker everytime the scene settles-- these instances are the most critical to blur-- and you can simply keyframe your blur mask shape to each marker location. Even if it zooms, mark major changes. Keyframing will interpolate the motion. It's rough and ready but it works.
Motion Trackers/Rotoscoping apps are best and ideal if your clip is long and the object is moving all over the place. Here are a few in no particular order:
Motion 2. Hey, you bought it and you might as well use it. Has a nice motion tracking feature.
Boris Continuum Complete
Lyric's Motion Tracking plug-in kit for FCP
CHV's The Motion Tracker Collection for FCP
Silhouette Roto
* This post has been modified
: 17 years ago