> For the complete documentation index, see [llms.txt](https://linkpi.gitbook.io/encoder/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://linkpi.gitbook.io/encoder/web-interface/extend/video-mix.md).

# Video Mix

This page can realize the function of multi-screen guide.

#### Preview

![](/files/dI21Bf7S3u1pNgerah8G)

The upper left of the page is the preview area, where you can choose the channel and layout, the encoder usually has only one Mix channel.

#### Layout config

![](/files/VF5P4pmN2mbWr8edLMb5)

The grids in the layout setting area will be arranged according to the selected layout, and the video source and audio switch (small speaker icon) can be selected for each position.

> Note that some models need to light up at least one small speaker, otherwise the audio of the Mix channel will not be encoded, resulting in the failure to output the stream.

#### Output config

![](/files/STzy5QqPKeyitGvsthst)

The output settings control the configuration of display interfaces such as HDMI, VGA, and SDI, and you can choose different resolutions and video sources.

When you switch the video source, the audio source will also switch to the corresponding channel.

The VGA interface of most encoders is not exposed, and can be led out with an adapter cable when needed.

`Mix enable`: Controls the overall switch of the Mix channel, which is the same as the Mix channel switch on the "Encoding Settings" page.

`Low latency`: When used for decoding output, turning on low delay will reduce the delay to a certain extent, but it will lose the scaling ability. The decoding resolution and output resolution must be the same. Turning on or off low latency requires a restart to take effect.


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