> For the complete documentation index, see [llms.txt](https://docs.datarhei.com/restreamer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.datarhei.com/restreamer/knowledge-base/manual/edit-livestream/general/video-settings/virtual-video-source.md).

# Virtual video source

With the help of the test signals, it is possible to test a transmission system, check for stability, or determine properties.

## 1 Virtual video source

![Fig. 1: Setting up virtual video sources in the configuration menu](https://304400748-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MS3qj4cW170AMeE1ckj-1703796690%2Fuploads%2FeayBWbvq6zwQ2tpRsteN%2Fvideoconf-vr-source.png?alt=media\&token=8383b81a-05c3-4981-be4d-0685fe0485f0)

Various signals, such as “Game Of Live” are available as an option with S23/B3 rule for test operation. FPS and size can be adjusted depending on the signal.

## 2 Video source selection

* Test pattern
* Test pattern extended
* RGB test pattern
* YUV test pattern
* EBU PAL 75%
* EBU PAL 100%
* SMPTE EG 1-1990
* SMPTE RP 219-2002
* Game of Live

### 3 Frame rate

Frame rate refers to the number of frames captured or played back per period and is specified in units of FPS (Frames Per Second), BpS (Frames / Frames per Second), or Hz (Hertz). Default value is in 25 / 30 / 50 / 60 FPS.

### 4 Video Resolution

A resolution that corresponds to a display device's resolution (number of pixels) is called native resolution. The Restreamer works best with 16:9 resolutions.

### <mark style="background-color:green;">5 Check</mark>

After a successful check, more details and the encoding settings can be shown.

## Learn more

{% content-ref url="/pages/80K7OHMawRWnt5l8SH2N" %}
[Video settings](/restreamer/knowledge-base/manual/edit-livestream/general/video-settings.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MYddF9jhlxYAwqYuY5S" %}
[Broken mention](broken://pages/-MYddF9jhlxYAwqYuY5S)
{% endcontent-ref %}

{% content-ref url="/pages/iY7aA2LX8Mke5qFLwsIu" %}
[Troubleshooting](/restreamer/knowledge-base/troubleshooting.md)
{% endcontent-ref %}

{% content-ref url="/pages/-MYd\_eWFK56LZQkA-iAN" %}
[User Guides](/restreamer/knowledge-base/user-guides.md)
{% endcontent-ref %}