SDK for PHP 3.x

Client: Aws\KinesisVideoMedia\KinesisVideoMediaClient
Service ID: kinesis-video-media
Version: 2017-09-30

This page describes the parameters and results for the operations of the Amazon Kinesis Video Streams Media (2017-09-30), and shows how to use the Aws\KinesisVideoMedia\KinesisVideoMediaClient object to call the described operations. This documentation is specific to the 2017-09-30 API version of the service.

Operation Summary

Each of the following operations can be created from a client using $client->getCommand('CommandName'), where "CommandName" is the name of one of the following operations. Note: a command is a value that encapsulates an operation and the parameters used to create an HTTP request.

You can also create and send a command immediately using the magic methods available on a client object: $client->commandName(/* parameters */). You can send the command asynchronously (returning a promise) by appending the word "Async" to the operation name: $client->commandNameAsync(/* parameters */).

GetMedia ( array $params = [] )
Use this API to retrieve media content from a Kinesis video stream.

Operations

GetMedia

$result = $client->getMedia([/* ... */]);
$promise = $client->getMediaAsync([/* ... */]);

Use this API to retrieve media content from a Kinesis video stream. In the request, you identify the stream name or stream Amazon Resource Name (ARN), and the starting chunk. Kinesis Video Streams then returns a stream of chunks in order by fragment number.

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

When you put media data (fragments) on a stream, Kinesis Video Streams stores each incoming fragment and related metadata in what is called a "chunk." For more information, see PutMedia. The GetMedia API returns a stream of these chunks starting from the chunk that you specify in the request.

The following limits apply when using the GetMedia API:

  • A client can call GetMedia up to five times per second per stream.

  • Kinesis Video Streams sends media data at a rate of up to 25 megabytes per second (or 200 megabits per second) during a GetMedia session.

If an error is thrown after invoking a Kinesis Video Streams media API, in addition to the HTTP status code and the response body, it includes the following pieces of information:

  • x-amz-ErrorType HTTP header – contains a more specific error type in addition to what the HTTP status code provides.

  • x-amz-RequestId HTTP header – if you want to report an issue to AWS, the support team can better diagnose the problem if given the Request Id.

Both the HTTP status code and the ErrorType header can be utilized to make programmatic decisions about whether errors are retry-able and under what conditions, as well as provide information on what actions the client programmer might need to take in order to successfully try again.

For more information, see the Errors section at the bottom of this topic, as well as Common Errors.

Parameter Syntax

$result = $client->getMedia([
    'StartSelector' => [ // REQUIRED
        'AfterFragmentNumber' => '<string>',
        'ContinuationToken' => '<string>',
        'StartSelectorType' => 'FRAGMENT_NUMBER|SERVER_TIMESTAMP|PRODUCER_TIMESTAMP|NOW|EARLIEST|CONTINUATION_TOKEN', // REQUIRED
        'StartTimestamp' => <integer || string || DateTime>,
    ],
    'StreamARN' => '<string>',
    'StreamName' => '<string>',
]);

Parameter Details

Members
StartSelector
Required: Yes
Type: StartSelector structure

Identifies the starting chunk to get from the specified stream.

StreamARN
Type: string

The ARN of the stream from where you want to get the media content. If you don't specify the streamARN, you must specify the streamName.

StreamName
Type: string

The Kinesis video stream name from where you want to get the media content. If you don't specify the streamName, you must specify the streamARN.

Result Syntax

[
    'ContentType' => '<string>',
    'Payload' => <string || resource || Psr\Http\Message\StreamInterface>,
]

Result Details

Members
ContentType
Type: string

The content type of the requested media.

Payload
Type: blob (string|resource|Psr\Http\Message\StreamInterface)

The payload Kinesis Video Streams returns is a sequence of chunks from the specified stream. For information about the chunks, see . The chunks that Kinesis Video Streams returns in the GetMedia call also include the following additional Matroska (MKV) tags:

  • AWS_KINESISVIDEO_CONTINUATION_TOKEN (UTF-8 string) - In the event your GetMedia call terminates, you can use this continuation token in your next request to get the next chunk where the last request terminated.

  • AWS_KINESISVIDEO_MILLIS_BEHIND_NOW (UTF-8 string) - Client applications can use this tag value to determine how far behind the chunk returned in the response is from the latest chunk on the stream.

  • AWS_KINESISVIDEO_FRAGMENT_NUMBER - Fragment number returned in the chunk.

  • AWS_KINESISVIDEO_SERVER_TIMESTAMP - Server timestamp of the fragment.

  • AWS_KINESISVIDEO_PRODUCER_TIMESTAMP - Producer timestamp of the fragment.

The following tags will be present if an error occurs:

  • AWS_KINESISVIDEO_ERROR_CODE - String description of an error that caused GetMedia to stop.

  • AWS_KINESISVIDEO_ERROR_ID: Integer code of the error.

The error codes are as follows:

  • 3002 - Error writing to the stream

  • 4000 - Requested fragment is not found

  • 4500 - Access denied for the stream's KMS key

  • 4501 - Stream's KMS key is disabled

  • 4502 - Validation error on the stream's KMS key

  • 4503 - KMS key specified in the stream is unavailable

  • 4504 - Invalid usage of the KMS key specified in the stream

  • 4505 - Invalid state of the KMS key specified in the stream

  • 4506 - Unable to find the KMS key specified in the stream

  • 5000 - Internal error

Errors

ResourceNotFoundException:

Status Code: 404, The stream with the given name does not exist.

NotAuthorizedException:

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

InvalidEndpointException:

Status Code: 400, Caller used wrong endpoint to write data to a stream. On receiving such an exception, the user must call GetDataEndpoint with AccessMode set to "READ" and use the endpoint Kinesis Video returns in the next GetMedia call.

ClientLimitExceededException:

Kinesis Video Streams has throttled the request because you have exceeded the limit of allowed client calls. Try making the call later.

ConnectionLimitExceededException:

Kinesis Video Streams has throttled the request because you have exceeded the limit of allowed client connections.

InvalidArgumentException:

The value for this input parameter is invalid.

Shapes

ClientLimitExceededException

Description

Kinesis Video Streams has throttled the request because you have exceeded the limit of allowed client calls. Try making the call later.

Members
Message
Type: string

ConnectionLimitExceededException

Description

Kinesis Video Streams has throttled the request because you have exceeded the limit of allowed client connections.

Members
Message
Type: string

InvalidArgumentException

Description

The value for this input parameter is invalid.

Members
Message
Type: string

InvalidEndpointException

Description

Status Code: 400, Caller used wrong endpoint to write data to a stream. On receiving such an exception, the user must call GetDataEndpoint with AccessMode set to "READ" and use the endpoint Kinesis Video returns in the next GetMedia call.

Members
Message
Type: string

NotAuthorizedException

Description

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

Members
Message
Type: string

ResourceNotFoundException

Description

Status Code: 404, The stream with the given name does not exist.

Members
Message
Type: string

StartSelector

Description

Identifies the chunk on the Kinesis video stream where you want the GetMedia API to start returning media data. You have the following options to identify the starting chunk:

  • Choose the latest (or oldest) chunk.

  • Identify a specific chunk. You can identify a specific chunk either by providing a fragment number or timestamp (server or producer).

  • Each chunk's metadata includes a continuation token as a Matroska (MKV) tag (AWS_KINESISVIDEO_CONTINUATION_TOKEN). If your previous GetMedia request terminated, you can use this tag value in your next GetMedia request. The API then starts returning chunks starting where the last API ended.

Members
AfterFragmentNumber
Type: string

Specifies the fragment number from where you want the GetMedia API to start returning the fragments.

ContinuationToken
Type: string

Continuation token that Kinesis Video Streams returned in the previous GetMedia response. The GetMedia API then starts with the chunk identified by the continuation token.

StartSelectorType
Required: Yes
Type: string

Identifies the fragment on the Kinesis video stream where you want to start getting the data from.

  • NOW - Start with the latest chunk on the stream.

  • EARLIEST - Start with earliest available chunk on the stream.

  • FRAGMENT_NUMBER - Start with the chunk after a specific fragment. You must also specify the AfterFragmentNumber parameter.

  • PRODUCER_TIMESTAMP or SERVER_TIMESTAMP - Start with the chunk containing a fragment with the specified producer or server timestamp. You specify the timestamp by adding StartTimestamp.

  • CONTINUATION_TOKEN - Read using the specified continuation token.

If you choose the NOW, EARLIEST, or CONTINUATION_TOKEN as the startSelectorType, you don't provide any additional information in the startSelector.

StartTimestamp
Type: timestamp (string|DateTime or anything parsable by strtotime)

A timestamp value. This value is required if you choose the PRODUCER_TIMESTAMP or the SERVER_TIMESTAMP as the startSelectorType. The GetMedia API then starts with the chunk containing the fragment that has the specified timestamp.