Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors See Also

GetImages

Managed support for images provides a fully managed way to get images from the video data streamed and stored in Kinesis Video Streams. You can use images to run machine learning (ML) workloads such as person, pet, or vehicle detection. Images can also be used to add interactive elements to playback, such as image previews for motion events and scrubbing for a video clip.

GetImages also retrieves a list of images corresponding to each timestamp for a given time range, sampling interval, and image format configuration.

Note

You must first call the GetDataEndpoint API to get an endpoint. Then send the GetImages requests to this endpoint using the --endpoint-url parameter.

Video playback track requirements.

Request Syntax


POST /getImages HTTP/1.1
Content-type: application/json

{
   "EndTimestamp": number,
   "Format": "string",
   "FormatConfig": { 
      "string" : "string" 
   },
   "HeightPixels": number,
   "ImageSelectorType": "string",
   "MaxResults": number,
   "NextToken": "string",
   "SamplingInterval": number,
   "StartTimestamp": number,
   "StreamARN": "string",
   "StreamName": "string",
   "WidthPixels": number
}

URI Request Parameters

The request does not use any URI parameters.

Request Body

The request accepts the following data in JSON format.

EndTimestamp

The end timestamp for the range of images to be generated. If the time range between StartTimestamp and EndTimestamp is more than 300 seconds above StartTimestamp, you will receive an IllegalArgumentException.

Type: Timestamp

Required: Yes

Format

The format that will be used to encode the image.

Type: String

Valid Values: JPEG | PNG

Required: Yes

FormatConfig

The list of a key-value pair structure that contains extra parameters that can be applied when the image is generated. The FormatConfig key is the JPEGQuality, which indicates the JPEG quality key to be used to generate the image. The FormatConfig value accepts ints from 1 to 100. If the value is 1, the image will be generated with less quality and the best compression. If the value is 100, the image will be generated with the best quality and less compression. If no value is provided, the default value of the JPEGQuality key will be set to 80.

Type: String to string map

Map Entries: Maximum number of 1 item.

Valid Keys: JPEGQuality

Value Length Constraints: Minimum length of 0. Maximum length of 256.

Value Pattern: ^[a-zA-Z_0-9]+

Required: No

HeightPixels

The height of the output image that is used in conjunction with the WidthPixels parameter. When both HeightPixels and WidthPixels parameters are provided, the image will be stretched to fit the specified aspect ratio. If only the HeightPixels parameter is provided, its original aspect ratio will be used to calculate the WidthPixels ratio. If neither parameter is provided, the original image size will be returned.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 2160.

Required: No

ImageSelectorType

The origin of the Server or Producer timestamps to use to generate the images.

Type: String

Valid Values: PRODUCER_TIMESTAMP | SERVER_TIMESTAMP

Required: Yes

MaxResults

The maximum number of images to be returned by the API.

Note

The default limit is 25 images per API response. Providing a MaxResults greater than this value will result in a page size of 25. Any additional results will be paginated.

Type: Long

Valid Range: Minimum value of 1. Maximum value of 100.

Required: No

NextToken

A token that specifies where to start paginating the next set of Images. This is the GetImages:NextToken from a previously truncated response.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 4096.

Pattern: [a-zA-Z0-9+/]+={0,2}

Required: No

SamplingInterval

The time interval in milliseconds (ms) at which the images need to be generated from the stream. The minimum value that can be provided is 200 ms (5 images per second). If the timestamp range is less than the sampling interval, the image from the startTimestamp will be returned if available.

Type: Integer

Required: No

StartTimestamp

The starting point from which the images should be generated. This StartTimestamp must be within an inclusive range of timestamps for an image to be returned.

Type: Timestamp

Required: Yes

StreamARN

The Amazon Resource Name (ARN) of the stream from which to retrieve the images. You must specify either the StreamName or the StreamARN.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 1024.

Pattern: arn:[a-z\d-]+:kinesisvideo:[a-z0-9-]+:[0-9]+:[a-z]+/[a-zA-Z0-9_.-]+/[0-9]+

Required: No

StreamName

The name of the stream from which to retrieve the images. You must specify either the StreamName or the StreamARN.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

Pattern: [a-zA-Z0-9_.-]+

Required: No

WidthPixels

The width of the output image that is used in conjunction with the HeightPixels parameter. When both WidthPixels and HeightPixels parameters are provided, the image will be stretched to fit the specified aspect ratio. If only the WidthPixels parameter is provided or if only the HeightPixels is provided, a ValidationException will be thrown. If neither parameter is provided, the original image size from the stream will be returned.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 3840.

Required: No

Response Syntax


HTTP/1.1 200
Content-type: application/json

{
   "Images": [ 
      { 
         "Error": "string",
         "ImageContent": "string",
         "TimeStamp": number
      }
   ],
   "NextToken": "string"
}

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.

Images

The list of images generated from the video stream. If there is no media available for the given timestamp, the NO_MEDIA error will be listed in the output. If an error occurs while the image is being generated, the MEDIA_ERROR will be listed in the output as the cause of the missing image.

Type: Array of Image objects

NextToken

The encrypted token that was used in the request to get more images.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 4096.

Pattern: [a-zA-Z0-9+/]+={0,2}

Errors

For information about the errors that are common to all actions, see Common Errors.

ClientLimitExceededException

Kinesis Video Streams has throttled the request because you have exceeded a limit. Try making the call later. For information about limits, see Kinesis Video Streams quotas.

HTTP Status Code: 400

InvalidArgumentException

A specified parameter exceeds its restrictions, is not supported, or can't be used.

HTTP Status Code: 400

NoDataRetentionException

GetImages was requested for a stream that does not retain data (that is, has a DataRetentionInHours of 0).

HTTP Status Code: 400

NotAuthorizedException

Status Code: 403, The caller is not authorized to perform an operation on the given stream, or the token has expired.

HTTP Status Code: 401

ResourceNotFoundException

GetImages will throw this error when Kinesis Video Streams can't find the stream that you specified.

GetHLSStreamingSessionURL and GetDASHStreamingSessionURL throw this error if a session with a PlaybackMode of ON_DEMAND or LIVE_REPLAY is requested for a stream that has no fragments within the requested time range, or if a session with a PlaybackMode of LIVE is requested for a stream that has no fragments within the last 30 seconds.

HTTP Status Code: 404