Removing Green Screen Background

Support Basics & Interface
1

Hi, I want to use Blender for video editing. I have OBS delivered video with a green background. Will it be possible to remove the green only using Blender so that I can add other backgrounds? Thanks.

2

Yes you can (shown by this 4 and 2 year old examples) :

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3

Wow! Never realised the video editor is this powerful.

4

Hi, you also have in the compositor a colour key :

color key
color key1920×991 341 KB

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5

Hi, I just starting with video editor. Do I have to render the whole green screen video once to remove the green screen? I am not getting any output in Compositor for Viewer node otherwise. Thanks.

6

You should be able to view the video:

vid
vid1920×991 906 KB

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7

Please check. Is it because I am using the video editor mode to add the video?

image
image1600×797 91.1 KB

8

Yes use the compositor.

vid2
vid21920×991 879 KB

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9

You need to use the MovieClip node to ‘read’ your video… Not the RenderLayer, which is your 3d scene and needs to be rendered.

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10

Awesome!!

Movie Clip Node + Chroma key gave awesome results :slight_smile:

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11

Thanks a lot. Just one doubt, while I get the green less screen in Compositor, in Video Editing mode, I get one with green screen. I am trying to add background through the lower tracks.

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12

Hi, I am still getting green screen in the Video Editing mode. Do I have to render the entire video or is there any method to call the Compsitor clip into Video Editing mode?

13

Yes render first then bring to video editing.

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14

When I clicked Render, it is rendering a video with Green screen. Looks like what is video editing mode is different from Compositor.

15

I rendered the video as MP4. Now green screen gone but a black screen.

16

The MP4 file format does not support an Alpha Channel…
You need to save the video as individual frames, in a format that can have transparency (png, tga, exr, etc).

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17

As Secrop said you need an alpha format .

testvid
testvid1920×991 668 KB

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18

The problem is, in Kdenlive, we add a Chroma key effect, remove green screen and continue editing. This is a bit time consuming and my video has 11,800 frames.

19

Normally, you just turn your video into a video format like MP4, only in the end, when all editing and composition is done.
Otherwise, you’ll start loosing definition and quality because of MP4 compressions, and that will ruin your work in the end.

Blender will let you use image sequences as if they are video files, and you can keep the top quality during your work.

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20

Thanks. Perhaps I am missing something. Is there any method I can remove green screen and add a background(s) before rendering the video?

It is a sales pitch video. I made it in Kdenlive already but I am trying to make a few assets popup, move etc. Thought Blender would be the best choice to try.