Media Server 25.4
Media Server Help

# LuaScript

The Lua script to run to draw on the source images or video frames.

Specify one of the following:

- the absolute path to the Lua script file. To strengthen security, Media Server can be configured to read files only from specified directories. For information about the directories that Media Server is permitted to read from, see the parameter AllowedInputDirectories.
- the path to the Lua script file, relative to the LuaDirectory.
- a string that matches one of your `AdditionalDataLabels`, (if you use the `AdditionalData` and `AdditionalDataLabels` action parameters to upload the Lua script file as part of the Process action).

The script must define a function with the name `draw`. The function is passed a `record` from the input track, for example:

    function draw(record)
      drawEllipse(record.FaceResultAndImage.face.ellipse, 3, rgb(255,255,255))
    end

For information about the Lua functions that you can use for drawing, see Drawing Functions.

Type: | String
Default: |
Required: | No
Configuration Section: | TaskName
Example: | `LuaScript=./configurations/draw.lua`
See Also: |

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Media Server 25.4

Topic Title: LuaScript