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Starts asynchronous detection of text in a stored video.
Amazon Rekognition Video can detect text in a video stored in an Amazon S3 bucket.
Use Video to specify the bucket name and the filename of the video. StartTextDetection
returns a job identifier (JobId) which you use to get the results of the operation.
When text 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 text detection operation, first check that the status value
published to the Amazon SNS topic is SUCCEEDED. if so, call GetTextDetection
and pass the job identifier (JobId) from the initial call to StartTextDetection.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginStartTextDetection and EndStartTextDetection.
Namespace: Amazon.Rekognition
Assembly: AWSSDK.Rekognition.dll
Version: 3.x.y.z
public virtual Task<StartTextDetectionResponse> StartTextDetectionAsync( StartTextDetectionRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the StartTextDetection service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
| Exception | Condition |
|---|---|
| AccessDeniedException | You are not authorized to perform the action. |
| IdempotentParameterMismatchException | A ClientRequestToken input parameter was reused with an operation, but at least one of the other input parameters is different from the previous call to the operation. |
| InternalServerErrorException | Amazon Rekognition experienced a service issue. Try your call again. |
| InvalidParameterException | Input parameter violated a constraint. Validate your parameter before calling the API operation again. |
| InvalidS3ObjectException | Amazon Rekognition is unable to access the S3 object specified in the request. |
| LimitExceededException | An Amazon Rekognition service limit was exceeded. For example, if you start too many jobs concurrently, subsequent calls to start operations (ex: StartLabelDetection) will raise a LimitExceededException exception (HTTP status code: 400) until the number of concurrently running jobs is below the Amazon Rekognition service limit. |
| ProvisionedThroughputExceededException | The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition. |
| ThrottlingException | Amazon Rekognition is temporarily unable to process the request. Try your call again. |
| VideoTooLargeException | The file size or duration of the supplied media is too large. The maximum file size is 10GB. The maximum duration is 6 hours. |
.NET:
Supported in: 8.0 and newer, Core 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5 and newer