Barcode Analysis Results
The following XML is a single record produced during barcode analysis:
<record> ... <trackname>barcode.Result</trackname> <BarcodeResult> <id>b8c4331e-6058-4786-83d9-a43e605f463e</id> <text>some text</text> <barcodeType>Code-128</barcodeType> <region> <left>94</left> <top>66</top> <width>311</width> <height>98</height> </region> <parentID>4d69390f-a8c4-4c5d-a0b0-705a3f98aa9b</parentID> </BarcodeResult> </record>
The record includes the following information:
-
The
id
element provides a unique identifier for the detected barcode. The barcode analysis engine issues an ID for each detected appearance of a barcode. If you are detecting barcodes in video and consecutive frames show the same barcode in a near-identical location, all records related to that appearance will have the same ID.For example, if a barcode appears in the same location for fifty consecutive video frames, the engine uses the same ID for each record in the data track and produces a single record in the result track. The record in the result track will have a timestamp that covers all fifty frames.
If the barcode moves to a different location on the screen, or disappears and then reappears, the engine considers this as a new detection and produces a new ID and a new record in the result track.
- The
text
element contains the data encoded by the barcode. If Media Server detects a barcode with a supplement, for example EAN-13+EAN-2, thetext
element contains the digits from both parts of the barcode, separated by a hyphen. -
The
barcodeType
element contains a string which describes the type of the detected barcode. This can be any of the following values:- Codabar
- Code-128
- Code-39
- Code-93
- Datalogic 2/5
- Data Matrix
- EAN-13
- EAN-13+EAN-2
- EAN-13+EAN-5
- EAN-8
- EAN-8+EAN-2
- EAN-8+EAN-5
- I25
- IATA 2/5
- Industrial 2/5
- Matrix 2/5
- Patch Code
- PDF417
- QR
- UPC-A
- UPC-A+EAN-2
- UPC-A+EAN-5
- UPC-E
- UPC-E+EAN-2
- UPC-E+EAN-5
- The
region
element describes the position of the barcode in the ingested media. If Media Server detects a barcode with a supplement, for example EAN-13+EAN-2, the region includes both parts of the barcode. -
The
parentID
element is empty, unless you configure the analysis engine withRegion=Input
in which case it contains the UUID of the input record. This provides a way to link the result with other records (from another analysis task) that supplied the region to analyze. To generate a single record combining the information, you can use the Combine ESP engine and the example Lua scriptparentuuidMatch.lua
.