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User Guide

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[ aws . rekognition ]



Starts asynchronous detection of labels in a stored video.

Amazon Rekognition Video can detect labels in a video. Labels are instances of real-world entities. This includes objects like flower, tree, and table; events like wedding, graduation, and birthday party; concepts like landscape, evening, and nature; and activities like a person getting out of a car or a person skiing.

The video must be stored in an Amazon S3 bucket. Use Video to specify the bucket name and the filename of the video. StartLabelDetection returns a job identifier (JobId ) which you use to get the results of the operation. When label detection is finished, Amazon Rekognition Video publishes a completion status to the Amazon Simple Notification Service topic that you specify in NotificationChannel .

To get the results of the label detection operation, first check that the status value published to the Amazon SNS topic is SUCCEEDED . If so, call and pass the job identifier (JobId ) from the initial call to StartLabelDetection .

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.


--video <value>
[--client-request-token <value>]
[--min-confidence <value>]
[--notification-channel <value>]
[--job-tag <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--video (structure)

The video in which you want to detect labels. The video must be stored in an Amazon S3 bucket.

Shorthand Syntax:


JSON Syntax:

  "S3Object": {
    "Bucket": "string",
    "Name": "string",
    "Version": "string"

--client-request-token (string)

Idempotent token used to identify the start request. If you use the same token with multiple StartLabelDetection requests, the same JobId is returned. Use ClientRequestToken to prevent the same job from being accidently started more than once.

--min-confidence (float)

Specifies the minimum confidence that Amazon Rekognition Video must have in order to return a detected label. Confidence represents how certain Amazon Rekognition is that a label is correctly identified.0 is the lowest confidence. 100 is the highest confidence. Amazon Rekognition Video doesn't return any labels with a confidence level lower than this specified value.

If you don't specify MinConfidence , the operation returns labels with confidence values greater than or equal to 50 percent.

--notification-channel (structure)

The Amazon SNS topic ARN you want Amazon Rekognition Video to publish the completion status of the label detection operation to.

Shorthand Syntax:


JSON Syntax:

  "SNSTopicArn": "string",
  "RoleArn": "string"

--job-tag (string)

Unique identifier you specify to identify the job in the completion status published to the Amazon Simple Notification Service topic.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.


JobId -> (string)

The identifier for the label detection job. Use JobId to identify the job in a subsequent call to GetLabelDetection .