# Face State Analysis

Face State analysis provides additional information about detected faces, for example:

- The facial expression.
- Whether the person's eyes are open.
- Whether the person is wearing spectacles.

Configuration Parameter | Description
--- | ---
Input | The track that you want to process.
NumParallel | The maximum number of video frames to analyze simultaneously.
SegmentDuration | The maximum duration of a record in the `SegmentedResult` or `SegmentedResultWithSource` track.
Type | The analysis engine to use. Set this parameter to `FaceState`.

## Output Tracks

Output track | Description | Output1This column indicates whether the information contained in the track is included by default in the output created by an output task (when you don't set the Input parameter for the output task).
--- | --- | ---
`Data` | Contains one record, describing the analysis results, for each input record. | No
`DataWithSource` | The same as the `Data` track, but each record also includes the source frame. | No
`Result` | Contains one record, describing the analysis results, for each detected face. | Yes
`ResultWithSource` | The same as the `Result` track, but each record also includes the best source frame. | No
`SegmentedResult` | (Available only when processing video). The same as the `Result` track, except the duration of each record is limited by the parameter SegmentDuration. If a result exceeds the specified duration, Media Server begins a new record with the same ID. | Yes
`SegmentedResultWithSource` | (Available only when processing video). The same as the `ResultWithSource` track, except the duration of each record is limited by the parameter SegmentDuration. If a result exceeds the specified duration, Media Server begins a new record with the same ID. | No

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