<blockquote>
  <p>I really want to know how this gets automatically edited.</p>
</blockquote>

<p>The technique is called <a href="https://en.wikipedia.org/wiki/Chroma_key" rel="nofollow">chroma key</a> and consists of considering as transparent all pixels of the colors within a specified range. This is usually used with a bluescreen or a green background. The image is then simply layered over another background.</p>

<p>As you have noticed, chroma key is not limited to postprocessing: <a href="https://www.google.fr/search?q=chroma%20key%20real-time" rel="nofollow">a lot of software products</a> can do this in real-time for live streaming.</p>

<p>By the way, if you have used Google Hangouts, <a href="http://www.googleplusdaily.com/2013/07/google-effects-for-google-hangouts.html" rel="nofollow">one of the effects</a> consists of replacing the background by an image. Don't be mislead by this, since this has nothing to do with a bluescreen and doesn't require any specific color for the background; I imagine that Hangouts' algorithm rather assumes that parts that don't move are the actual background.</p>

CC BY-SA 3.0
2016-09-01T18:17:24.280Z
Ah, perfect, chroma key is what I was looking for! Thanks!
SidS
CC BY-SA 3.0
2016-09-01T15:30:49.947Z
2016-09-01T15:30:49.947Z
Arseni Mourzenko
<p>I always watch and wonder how some youtubers have a little window on a corner of a gameplay or something...</p>

<p>My doubt isn't on how they get the image, my doubt is on how some youtubers get the video of themselves with a transparent background on top of the gameplay.</p>

<p>I know this requires a green screen, but I really want to know how this gets automatically edited. I have seen some live gameplay with the transparent effect.</p>

<p>How do the youtubers get a transparent background on a live feed?</p>

<p>What I am trying to achieve is, recording myself on a live feed, but with a transparent background... If you see what I mean...</p>

<p>Answers much appreciated,</p>

<p>Sid</p>

CC BY-SA 3.0
2016-09-01T09:06:37.283Z
can you give us an example of what you are trying to achieve
Adam Mann Pro
CC BY-SA 3.0
2016-09-01T10:12:39.723Z
Check the edit, what I am trying to do, is, I am trying to do a live video feed on twitch or something, but the background around be is transparent so I am like an over lay on the corner of the main gameplay...
SidS
<editing><greenscreen><live-recording>
How to record a live video of yourself with a transparent background?
SidS
# How to record a live video of yourself with a transparent background?

(Asked by: username_0 on 2016-08-31)

I always watch and wonder how some youtubers have a little window on a corner of a gameplay or something...

My doubt isn't on how they get the image, my doubt is on how some youtubers get the video of themselves with a transparent background on top of the gameplay.

I know this requires a green screen, but I really want to know how this gets automatically edited. I have seen some live gameplay with the transparent effect.

How do the youtubers get a transparent background on a live feed?

What I am trying to achieve is, recording myself on a live feed, but with a transparent background... If you see what I mean...

Answers much appreciated,

Sid

**Tags:** editing, greenscreen, live-recording

> **Comments:**
> **username_1**: can you give us an example of what you are trying to achieve  
> **username_0**: Check the edit, what I am trying to do, is, I am trying to do a live video feed on twitch or something, but the background around be is transparent so I am like an over lay on the corner of the main gameplay...  

---

## 1 answers

### Answer by username_2 on 2016-09-01. Score: 3 | Accepted answer

> I really want to know how this gets automatically edited.

The technique is called [chroma key](https://en.wikipedia.org/wiki/Chroma_key) and consists of considering as transparent all pixels of the colors within a specified range. This is usually used with a bluescreen or a green background. The image is then simply layered over another background.

As you have noticed, chroma key is not limited to postprocessing: [a lot of software products](https://www.google.fr/search?q=chroma%20key%20real-time) can do this in real-time for live streaming.

By the way, if you have used Google Hangouts, [one of the effects](http://www.googleplusdaily.com/2013/07/google-effects-for-google-hangouts.html) consists of replacing the background by an image. Don't be mislead by this, since this has nothing to do with a bluescreen and doesn't require any specific color for the background; I imagine that Hangouts' algorithm rather assumes that parts that don't move are the actual background.

> **Comments:**
> **username_0**: Ah, perfect, chroma key is what I was looking for! Thanks!  

---

