# Event Processing Configuration Parameters

This section describes the parameters that you can use to configure Event Stream Processing (ESP) tasks. Set these parameters in the configuration that you pass to the `process` action when you begin processing, and not in the Media Server configuration file.

In the `[Session]` section, use the `Engine` parameter to specify the names of your tasks. Each name refers to another section in the configuration that contains settings for the task.

You can specify a comma-separated list of names:

    [Session]
    Engine=IngestVideo,FaceDetection,FaceRecognition,ResizeImages,EncodeImagesToDisk,OutputToIDOL

Alternatively, you can use numbered parameters. Use a unique number for each task, starting from zero (0) and increasing by one each time:

    [Session]
    Engine0=IngestVideo
    Engine1=FaceDetection
    Engine2=FaceRecognition
    Engine3=ResizeImages
    Engine4=EncodeImagesToDisk
    Engine5=OutputToIDOL

NOTE: Task names cannot include any of the following characters:

- period (`.`)
- comma (`,`)
- colon (`:`)
- semicolon (`;`)
- asterisk (`*`)
- equals sign (`=`)

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