# Understanding meeting event files for Amazon Chime SDK media capture pipelines
<a name="meeting-events"></a>

The meeting-events folder contains meeting events in the .txt format, and each event is a JSON object. Messages are visible with all configurations options. File names contain the <yyyy-mm-dd-hour-min-seconds-milleseconds> timestamp. This example shows the fields and data in a typical event file.

```
{
    "Timestamp": "string",
    "EventType": "AttendeeJoined | AttendeeLeft | AttendeeVideoJoined | AttendeeVideoLeft | ActiveSpeaker | CaptureStarted | CaptureEnded  | AudioTrackMute | AudioTrackUnmute",
    "EventParameters": {
        # ...
    }
}
```