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# Face Recognition Engine Configuration Parameters

The Face Recognition analysis engine performs face recognition on faces that are detected in video. Before using this engine you must train Media Server to recognize faces, by providing images of people who you want to recognize.

This section describes the parameters that you can set in the configuration section for a Face Recognition task.

Configuration Parameter | Description
--- | ---
Database | A face database to use to recognize faces in an image. Media Server compares the detected faces to faces in this database.
FrameRate | The number of frames to analyze per second of video.
Identifier | A comma-separated list of identifiers that specifies the faces to match against.
Input | The track that you want to analyze.
MaxRecognitionResults | The maximum number of recognition results to return per face.
RecognitionThreshold | The minimum confidence score required to consider a face as a match.
Type | The analysis engine to use. Set this parameter to `FaceRecognize`.

## Output Tracks

Output track | Type | 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).
--- | --- | --- | ---
`Result` | FaceRecognitionResult | Contains a record for each detected face. | Yes
`ResultWithSource` | FaceRecognitionAndImage | Contains the same information as the `Result` track, but each record also includes the best source frame. | No

FaceRecognitionResult

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face
face | FaceData | Information about the detected face
identity | IdentityData | The identity of the person who matches the detected face. If the face was not recognized, this field is empty.

FaceRecognitionAndImage

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the face
face | FaceData | Information about the detected face
identity | IdentityData | The identity of the person who matches the detected face. If the face was not recognized, this field is empty.
image | ImageData | The source frame

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