GetSegmentDetection - Amazon Rekognition

GetSegmentDetection

Gets the segment detection results of a Amazon Rekognition Video analysis started by StartSegmentDetection.

Segment detection with Amazon Rekognition Video is an asynchronous operation. You start segment detection by calling StartSegmentDetection which returns a job identifier (JobId). When the segment detection operation finishes, Amazon Rekognition publishes a completion status to the Amazon Simple Notification Service topic registered in the initial call to StartSegmentDetection. To get the results of the segment detection operation, first check that the status value published to the Amazon SNS topic is SUCCEEDED. if so, call GetSegmentDetection and pass the job identifier (JobId) from the initial call of StartSegmentDetection.

GetSegmentDetection returns detected segments in an array (Segments) of SegmentDetection objects. Segments is sorted by the segment types specified in the SegmentTypes input parameter of StartSegmentDetection. Each element of the array includes the detected segment, the precentage confidence in the acuracy of the detected segment, the type of the segment, and the frame in which the segment was detected.

Use SelectedSegmentTypes to find out the type of segment detection requested in the call to StartSegmentDetection.

Use the MaxResults parameter to limit the number of segment detections returned. If there are more results than specified in MaxResults, the value of NextToken in the operation response contains a pagination token for getting the next set of results. To get the next page of results, call GetSegmentDetection and populate the NextToken request parameter with the token value returned from the previous call to GetSegmentDetection.

For more information, see Detecting Video Segments in Stored Video.

Request Syntax

{ "JobId": "string", "MaxResults": number, "NextToken": "string" }

Request Parameters

The request accepts the following data in JSON format.

JobId

Job identifier for the text detection operation for which you want results returned. You get the job identifer from an initial call to StartSegmentDetection.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 64.

Pattern: ^[a-zA-Z0-9-_]+$

Required: Yes

MaxResults

Maximum number of results to return per paginated call. The largest value you can specify is 1000.

Type: Integer

Valid Range: Minimum value of 1.

Required: No

NextToken

If the response is truncated, Amazon Rekognition Video returns this token that you can use in the subsequent request to retrieve the next set of text.

Type: String

Length Constraints: Maximum length of 255.

Required: No

Response Syntax

{ "AudioMetadata": [ { "Codec": "string", "DurationMillis": number, "NumberOfChannels": number, "SampleRate": number } ], "JobStatus": "string", "NextToken": "string", "Segments": [ { "DurationMillis": number, "DurationSMPTE": "string", "EndTimecodeSMPTE": "string", "EndTimestampMillis": number, "ShotSegment": { "Confidence": number, "Index": number }, "StartTimecodeSMPTE": "string", "StartTimestampMillis": number, "TechnicalCueSegment": { "Confidence": number, "Type": "string" }, "Type": "string" } ], "SelectedSegmentTypes": [ { "ModelVersion": "string", "Type": "string" } ], "StatusMessage": "string", "VideoMetadata": [ { "Codec": "string", "DurationMillis": number, "Format": "string", "FrameHeight": number, "FrameRate": number, "FrameWidth": number } ] }

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

AudioMetadata

An array of AudioMetadata objects. There can be multiple audio streams. Each AudioMetadata object contains metadata for a single audio stream. Audio information in an AudioMetadata objects includes the audio codec, the number of audio channels, the duration of the audio stream, and the sample rate. Audio metadata is returned in each page of information returned by GetSegmentDetection.

Type: Array of AudioMetadata objects

JobStatus

Current status of the segment detection job.

Type: String

Valid Values: IN_PROGRESS | SUCCEEDED | FAILED

NextToken

If the previous response was incomplete (because there are more labels to retrieve), Amazon Rekognition Video returns a pagination token in the response. You can use this pagination token to retrieve the next set of text.

Type: String

Length Constraints: Maximum length of 255.

Segments

An array of segments detected in a video. The array is sorted by the segment types (TECHNICAL_CUE or SHOT) specified in the SegmentTypes input parameter of StartSegmentDetection. Within each segment type the array is sorted by timestamp values.

Type: Array of SegmentDetection objects

SelectedSegmentTypes

An array containing the segment types requested in the call to StartSegmentDetection.

Type: Array of SegmentTypeInfo objects

StatusMessage

If the job fails, StatusMessage provides a descriptive error message.

Type: String

VideoMetadata

Currently, Amazon Rekognition Video returns a single VideoMetadata object in the VideoMetadata array. The object contains information about the video stream in the input file that Amazon Rekognition Video chose to analyze. The VideoMetadata object includes the video codec, video format and other information. Video metadata is returned in each page of information returned by GetSegmentDetection.

Type: Array of VideoMetadata objects

Errors

AccessDeniedException

You are not authorized to perform the action.

HTTP Status Code: 400

InternalServerError

Amazon Rekognition experienced a service issue. Try your call again.

HTTP Status Code: 500

InvalidPaginationTokenException

Pagination token in the request is not valid.

HTTP Status Code: 400

InvalidParameterException

Input parameter violated a constraint. Validate your parameter before calling the API operation again.

HTTP Status Code: 400

ProvisionedThroughputExceededException

The number of requests exceeded your throughput limit. If you want to increase this limit, contact Amazon Rekognition.

HTTP Status Code: 400

ResourceNotFoundException

The collection specified in the request cannot be found.

HTTP Status Code: 400

ThrottlingException

Amazon Rekognition is temporarily unable to process the request. Try your call again.

HTTP Status Code: 500

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: