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# Barcode Engine Configuration Parameters

The Barcode analysis engine detects and read QR codes. This section describes the parameters that you can set in the configuration section for a Barcode analysis task.

Configuration Parameter | Description
--- | ---
FrameRate | The number of frames to analyze per second of video.
Input | The image track to process.
Region | A region of the frame to restrict processing to.
RegionUnit | The units that the Region parameter uses to specify the size and position of a region.
Type | The analysis engine to use. Set this parameter to `Barcode`.

## 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).
--- | --- | --- | ---
`Data` | BarcodeResult | Contains a record for every frame in which a QR code is detected (multiple records are created when the same QR code appears in consecutive frames). | No
`DataWithSource` | BarcodeAndImage | Contains the same information as the `Data` track, but each record also includes the source frame. | No
`Event` | BarcodeEvent | Media Server creates a record in this track when a QR code appears or disappears. | Yes
`Result` | BarcodeResult | Contains a single record for each detected QR code (the same QR code might appear in many consecutive frames). This track only contains the best result from processing a QR code. | Yes
`ResultWithSource` | BarcodeAndImage | Contains the same information as the `Result` track, but each record also includes the best source frame. | No

BarcodeResult

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the barcode (there is one UUID per barcode; records with the same UUID represent the same barcode in different frames)
text | TextData | The information encoded by the QR code
region | RectangleData | The location of the QR code in the frame

BarcodeAndImage

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the barcode (there is one UUID per barcode; records with the same UUID represent the same barcode in different frames)
text | TextData | The information encoded by the QR code
region | RectangleData | The location of the QR code in the frame
image | ImageData | The source frame

BarcodeEvent

Field name | Type | Description
--- | --- | ---
id | UUIDData | A universally unique identifier to identify the barcode (there is one UUID per barcode; records with the same UUID represent the same barcode in different frames)
event | TrackingEventData | The type of event (begin/end), and the elapsed time since the barcode appeared.
text | TextData | The information encoded by the QR code

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