21 - Blender Video Editing(Face Blurring / Masking with UV-Image Editor / Auto-Keyframe)
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21 – Blender Video Editing(Face Blurring / Masking with UV-Image Editor / Auto-Keyframe)

Views:51011|Rating:4.90|View Time:10:49Minutes|Likes:671|Dislikes:13
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Video Description

I show you how to create a mask in the UV/Image editor. I then show you how to move the mask around during playback so that it covers the subject’s face creating a moving, face blur effect. I also introduce you to the Gaussian blur effect strip.



00:00 – Previous video

00:10 – today’s video intro

00:56 – Open UV/Image editor

1:08 – switch to Mask Mode to create new mask

1:42 – load reference video

2:16 – Set Properties: “Match movie Length” and “Auto Refresh”

3:00 – start drawing your mask

4:00 – Turn on “Auto Keyframe Insert”

4:50 – go frame by frame with Arrow Keys and move mask

6:20 – lets watch the mask move

6:54 – Let’s get our mask in the video

7:17 – Add Adjustment layer

7:47 – Add strip modifier: Mask

8:30 – create Gaussian Blur strip from Adjustment strip

9:20 – Set the Blur X/Y values

Credits for Movie used in this tutorial:

Big Buck Bunny
(c) copyright 2008, Blender Foundation / www.bigbuckbunny.org

Big Buck Bunny uses Creative Commons License:

22 Replies to “21 – Blender Video Editing(Face Blurring / Masking with UV-Image Editor / Auto-Keyframe)”

  1. Hey Mikeycal
    I would like to do a similar thing except that I want the mask part to glow in any color, like creating a energy field or so. How can I do that.

  2. Mikey, I keep coming back to your tutorias because they are an excellent reference for video editing. Thank you and good luck with all your projects!

  3. If anyone has problem with blur not moving in the preview video, you need to check absolute in the mask modifier properties.

  4. masking cheats after learning more on my own:
    -if you select ur entire mask and hold shift and left click drag it outwards (say its a circle)…or inwards u might have to. It creates a feather which will mesh the mask into the surrounding image, if its paired with one, so its a smoother looking image (good for overlays). You can resize the entire feather with alt+s after selecting the entire mask. if ur doing a circle and want the feather to go outward instead of inward or vice versa you have to reverse the cyclic, which is one of the file options under the uv just search the file menu.
    -hit F12 at any frame in the sequencer to do a render of the image. if u do this while the uv image port is opened it will move that image to the uv image port. This saves u the time of re-opening an entire video file in the uv editor and finding ur frame.
    -if u go to modifier on a video strip. so just n, then change the menue down one to modifiers. u have the option of making the mask inserted into the strip instead of doing the adjustment layer thing, i find this easier to do. always use the default relative mask setting, if its not working on that then u gotta fix it so it does. Its also useful if u wanna just do a lipflap mask. u don't even need to hit f12 or get an image as reference in the uv. u can shift+a…..make a circle. Then just move the circle to the place its around. Then go to ur strip and put the mask on….then turn it on/off and move it around till its where u want it. Then ur entire strip can be turned into an overlay. if u need the original strip just copy the existing one before/after and remove the mask if its there. so if u want closed lips when their lips are actually open…. u create an overlay circle of a closed lip and you'll now place that over a real strip and it'll cover the part in question. Good if you don't want to interrupt an animation but just change their lips, like in anime abridgments. Feathering is useful for this if ur dealing with variable colours or real life faces.

    If i solve my other problems with masking ill mbe report here…..but there's alot of problems i haven't found solutions to yet. like avoid making new nodes at a point in a mask unless u kno what ur doing…..so create the nodes ahead of time and just move them throughout the mask is what i have to do atm. Don't make mask layers within a single mask unless u kno what ur doing. always do masks separately and individually until u kno what u are doing in the simplistic generic cases. like experiment with simple shapes first. do a donut mask, a mask within a mask, and stuff like that. i haven't been able to get mask layers to work regardless of tinkering with things you'd expect to make it work.

  5. Can anyone help me: I have a circle within a circle. I need to mask the outer circle to remove the background, but I need to mask the inner circle so its transparent as well…so I'm left with a donut basically. I use mask layers (2 of them), but what happens is the outer mask layer always overwrites the inner one….I've fooled with the add/subtract and whtever I can see on tha page but I cant fix it….I can either get the inner circle transparent or the background transparent (by hiding the render of the other mask and vice versa)….I can't get both done in the same mask. The outer mask layer overwrites the inner mask layer. The only thing I can think of doing is 2 separate masks….and overlay one on the other, but that's ridiculous given this is an analogy for the fact I'm trying to mask a woman out of a picture and her hair is moving creating separate closed instances that I need to mask out on their own (cause im trying to remove her and her hair from the background) and there's alot of closed hair pockets and I can only see countless strips overlaying eachother in my vse now…

  6. I want to ask, when I add adjustment layer and add the transformation effect, the fps is going down even though I have added Proxy/Timecode. How to speed up dropping frame rate when preview the videos?

  7. I am unable to make the UV image update at the same time as the output video port. Here are my steps: 1. I open the UV window, 2 I change to MASK mode, 3 create new mask and rename it to "blur", 4 I open the clip as a reference, 5 I open the properties, click the match movie length button and check the Auto refresh tick. No way, the UV window remains static as I move thru the video. Output updates ok, UV will not. Blender 2.78. What am I missing?

  8. what else can you do with masks other than blur/colour/basiceffect? there another series I should refer to moving forward? can u use masks to overlay video? that might be useful in combination with the blur/colour control….like having a video overlay going off inside a puddle of water.

  9. How do you increase the blur? 20 isn't much of a blur effect…and if i go higher it decreases the blur…..if I go lower it also decreases the blur. Is 20 the max blender enables? I need more blur. I can place other modifiers and use like white/black colours to help cover the parts but…wanted a higher blur. im trying to indicate nudity where there is no actual nudity….so it needs to be blurred to a large extent. infact if there was nudity idk how the heck a setting of 20, or any combination in that tab, would be enough to cover it…

    Also how do I modify the length of the adjustment strip without throwing off the movement of the entire thing? I find I can pull it inwards from the ending, but if I adjust the start of the strip it moves everything further up the video. I decided I wanted to hide the strip for the start of the video, so idk how to change that now without having to redo all the keyframes for positioning how the mask moves.

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