In this video we show how to create a mask in Blender and use it to apply a privacy blur to a video. This effect is useful if want to hide the identify of a person or object in a video.
[UPDATE] – In newer versions of Blender, at 12:56 you may need to change the Adjustment Layer \ Strip \ Blend \ change to Alpha Over
Topics and timestamps:
0:00 – Introduction and demonstration of the privacy blur effect
1:51 – Adding video to project
2:42 – Adding ‘Masking Tab’
4:15 – Creating a mask
5:12 – Drawing the mask
11:42 – Adding an adjustment layer
13:46 – Adding Effect Strip (Gaussian Blur)
18:43 – Summary/cheat-sheet of commands
Summary/Cheat-Sheet
1. Add movie to Video Editing Sequencer.
2. Add Masking Tab.
a. + at top of screen, VFX, Masking.
b. Click on ‘open’ (near middle of screen) and select same movie.
c. Click on ‘New’ (near bottom of screen), give mask a name.
3. Draw mask (Ctrl + Click).
4. Turn on auto-keyframing.
5. Move forward several frames and update mask (A – select all points, G – grab all points)
6. Go back to Video Editing Sequencer.
a. Add adjustment layer to video clip (make it the same length as clip). Modifiers, Add Strip Modifier, Mask, chose mask. Strip, Blend, Alpha Over
b. Select adjustment layer, add Effect Strip, Gaussian blur, Size X, Y.
References:
- Getting Started with Blender for Video Editing (https://youtu.be/m7c45On2eYk)
- Blender for Video Editing: Introduction to Keyframes (https://youtu.be/5L-w143fEQA)
All Blender videos in a single playlist (https://www.youtube.com/playlist?list=PLxdnSsBqCrrG9vYaQMDE0A16c4M52b7vJ)
#Blender
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