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# OBS
[Open Broadcaster Software](https://obsproject.com) - short OBS - is a free
and open source software for video recording and live streaming.
For webcams and their configuration see [the webcams entry](/wiki/webcams.md#configure-the-webcam).
## Plugins
There are several plugins made by non-obs developers.
The plugins introduce different and new features.
On [Linux](/wiki/linux.md) devices using Wayland the additional package `wlrobs` is needed.
### Virtual Camera
By using a virtual camera the views of OBS can be used as an additional camera
output, making it possible to add effects and more to the video feed of the
camera.
#### Installation (Linux)
First of all [V4L2](./linux/v4l2.md) needs to be set up.
This guide assumes it is set up according to the section in the
[V4L2 entry](./linux/v4l2.md#v4l2loopback).
Afterwards the virtual camera can be started.
### Background Removal
Background removal removes the background of a camera image stream.
The removed background can be replaced with color key filters.
#### Installation
Made by royshil [the GitHub page](https://github.com/royshil/obs-backgroundremoval#linux) describes
various possibilities to install the background removal for OBS on different systems.
On Linux systems background removal is often contained in a package named `obs-backgroundremoval`
or similarly.
Afterwards the background removal can be added as a filter on a input source.
## Troubleshooting
This section focusses on various errors that can appear by using OBS.
### `Output Failed: If you are using NVENC or AMD encoders, make sure the video drivers are up to date`
This error does occur most of the time when trying to start
[OBS' virtual camera](/wiki/obs.md#virtual-camera).
If all the drivers are up to date there is a chance that it is caused by a bug or error in the code
of [V4L2](/wiki/linux/v4l2.md).
A possible fix is described in a
[corresponding section of the V4L2 entry](/wiki/linux/v4l2.md#failed-to-start-streaming-on-devvideo2-invalid-argument).