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Class: Aws::KinesisVideoArchivedMedia::Client

Inherits:
Seahorse::Client::Base show all
Defined in:
(unknown)

Overview

An API client for Amazon Kinesis Video Streams Archived Media. To construct a client, you need to configure a :region and :credentials.

kinesisvideoarchivedmedia = Aws::KinesisVideoArchivedMedia::Client.new(
  region: region_name,
  credentials: credentials,
  # ...
)

See #initialize for a full list of supported configuration options.

Region

You can configure a default region in the following locations:

  • ENV['AWS_REGION']
  • Aws.config[:region]

Go here for a list of supported regions.

Credentials

Default credentials are loaded automatically from the following locations:

  • ENV['AWS_ACCESS_KEY_ID'] and ENV['AWS_SECRET_ACCESS_KEY']
  • Aws.config[:credentials]
  • The shared credentials ini file at ~/.aws/credentials (more information)
  • From an instance profile when running on EC2

You can also construct a credentials object from one of the following classes:

Alternatively, you configure credentials with :access_key_id and :secret_access_key:

# load credentials from disk
creds = YAML.load(File.read('/path/to/secrets'))

Aws::KinesisVideoArchivedMedia::Client.new(
  access_key_id: creds['access_key_id'],
  secret_access_key: creds['secret_access_key']
)

Always load your credentials from outside your application. Avoid configuring credentials statically and never commit them to source control.

Instance Attribute Summary

Attributes inherited from Seahorse::Client::Base

#config, #handlers

Constructor collapse

API Operations collapse

Instance Method Summary collapse

Methods inherited from Seahorse::Client::Base

add_plugin, api, #build_request, clear_plugins, define, new, #operation, #operation_names, plugins, remove_plugin, set_api, set_plugins

Methods included from Seahorse::Client::HandlerBuilder

#handle, #handle_request, #handle_response

Constructor Details

#initialize(options = {}) ⇒ Aws::KinesisVideoArchivedMedia::Client

Constructs an API client.

Options Hash (options):

  • :access_key_id (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :convert_params (Boolean) — default: true

    When true, an attempt is made to coerce request parameters into the required types. See Plugins::ParamConverter for more details.

  • :credentials (required, Credentials)

    Your AWS credentials. The following locations will be searched in order for credentials:

    • :access_key_id, :secret_access_key, and :session_token options
    • ENV['AWS_ACCESS_KEY_ID'], ENV['AWS_SECRET_ACCESS_KEY']
    • HOME/.aws/credentials shared credentials file
    • EC2 instance profile credentials See Plugins::RequestSigner for more details.
  • :endpoint (String)

    A default endpoint is constructed from the :region. See Plugins::RegionalEndpoint for more details.

  • :http_continue_timeout (Float) — default: 1

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_idle_timeout (Integer) — default: 5

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_open_timeout (Integer) — default: 15

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_proxy (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_read_timeout (Integer) — default: 60

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :http_wire_trace (Boolean) — default: false

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :log_level (Symbol) — default: :info

    The log level to send messages to the logger at. See Plugins::Logging for more details.

  • :log_formatter (Logging::LogFormatter)

    The log formatter. Defaults to Seahorse::Client::Logging::Formatter.default. See Plugins::Logging for more details.

  • :logger (Logger) — default: nil

    The Logger instance to send log messages to. If this option is not set, logging will be disabled. See Plugins::Logging for more details.

  • :profile (String)

    Used when loading credentials from the shared credentials file at HOME/.aws/credentials. When not specified, 'default' is used. See Plugins::RequestSigner for more details.

  • :raise_response_errors (Boolean) — default: true

    When true, response errors are raised. See Seahorse::Client::Plugins::RaiseResponseErrors for more details.

  • :region (required, String)

    The AWS region to connect to. The region is used to construct the client endpoint. Defaults to ENV['AWS_REGION']. Also checks AMAZON_REGION and AWS_DEFAULT_REGION. See Plugins::RegionalEndpoint for more details.

  • :retry_limit (Integer) — default: 3

    The maximum number of times to retry failed requests. Only ~ 500 level server errors and certain ~ 400 level client errors are retried. Generally, these are throttling errors, data checksum errors, networking errors, timeout errors and auth errors from expired credentials. See Plugins::RetryErrors for more details.

  • :secret_access_key (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :session_token (String)

    Used to set credentials statically. See Plugins::RequestSigner for more details.

  • :ssl_ca_bundle (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_ca_directory (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_ca_store (String)

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :ssl_verify_peer (Boolean) — default: true

    See Seahorse::Client::Plugins::NetHttp for more details.

  • :stub_responses (Boolean) — default: false

    Causes the client to return stubbed responses. By default fake responses are generated and returned. You can specify the response data to return or errors to raise by calling ClientStubs#stub_responses. See ClientStubs for more information.

    Please note When response stubbing is enabled, no HTTP requests are made, and retries are disabled. See Plugins::StubResponses for more details.

  • :validate_params (Boolean) — default: true

    When true, request parameters are validated before sending the request. See Plugins::ParamValidator for more details.

Instance Method Details

#get_hls_streaming_session_url(options = {}) ⇒ Types::GetHLSStreamingSessionURLOutput

Retrieves an HTTP Live Streaming (HLS) URL for the stream. You can then open the URL in a browser or media player to view the stream contents.

You must specify either the StreamName or the StreamARN.

An Amazon Kinesis video stream has the following requirements for providing data through HLS:

  • The media type must be video/h264.

  • Data retention must be greater than 0.

  • The fragments must contain codec private data in the AVC (Advanced Video Coding) for H.264 format (MPEG-4 specification ISO/IEC 14496-15). For information about adapting stream data to a given format, see NAL Adaptation Flags.

Kinesis Video Streams HLS sessions contain fragments in the fragmented MPEG-4 form (also called fMP4 or CMAF), rather than the MPEG-2 form (also called TS chunks, which the HLS specification also supports). For more information about HLS fragment types, see the HLS specification.

The following procedure shows how to use HLS with Kinesis Video Streams:

  1. Get an endpoint using GetDataEndpoint, specifying GET_HLS_STREAMING_SESSION_URL for the APIName parameter.

  2. Retrieve the HLS URL using GetHLSStreamingSessionURL. Kinesis Video Streams creates an HLS streaming session to be used for accessing content in a stream using the HLS protocol. GetHLSStreamingSessionURL returns an authenticated URL (that includes an encrypted session token) for the session's HLS master playlist (the root resource needed for streaming with HLS).

    Don't share or store this token where an unauthorized entity could access it. The token provides access to the content of the stream. Safeguard the token with the same measures that you would use with your AWS credentials.

    The media that is made available through the playlist consists only of the requested stream, time range, and format. No other media data (such as frames outside the requested window or alternate bit rates) is made available.

  3. Provide the URL (containing the encrypted session token) for the HLS master playlist to a media player that supports the HLS protocol. Kinesis Video Streams makes the HLS media playlist, initialization fragment, and media fragments available through the master playlist URL. The initialization fragment contains the codec private data for the stream, and other data needed to set up the video decoder and renderer. The media fragments contain H.264-encoded video frames and time stamps.

  4. The media player receives the authenticated URL and requests stream metadata and media data normally. When the media player requests data, it calls the following actions:

    • GetHLSMasterPlaylist: Retrieves an HLS master playlist, which contains a URL for the GetHLSMediaPlaylist action, and additional metadata for the media player, including estimated bit rate and resolution.

    • GetHLSMediaPlaylist: Retrieves an HLS media playlist, which contains a URL to access the MP4 initialization fragment with the GetMP4InitFragment action, and URLs to access the MP4 media fragments with the GetMP4MediaFragment actions. The HLS media playlist also contains metadata about the stream that the player needs to play it, such as whether the PlaybackMode is LIVE or ON_DEMAND. The HLS media playlist is typically static for sessions with a PlaybackType of ON_DEMAND. The HLS media playlist is continually updated with new fragments for sessions with a PlaybackType of LIVE.

    • GetMP4InitFragment: Retrieves the MP4 initialization fragment. The media player typically loads the initialization fragment before loading any media fragments. This fragment contains the "fytp" and "moov" MP4 atoms, and the child atoms that are needed to initialize the media player decoder.

      The initialization fragment does not correspond to a fragment in a Kinesis video stream. It contains only the codec private data for the stream, which the media player needs to decode video frames.

    • GetMP4MediaFragment: Retrieves MP4 media fragments. These fragments contain the "moof" and "mdat" MP4 atoms and their child atoms, containing the encoded fragment's video frames and their time stamps.

      After the first media fragment is made available in a streaming session, any fragments that don't contain the same codec private data are excluded in the HLS media playlist. Therefore, the codec private data does not change between fragments in a session.

      Data retrieved with this action is billable. See Pricing for details.

The following restrictions apply to HLS sessions:

  • A streaming session URL should not be shared between players. The service might throttle a session if multiple media players are sharing it. For connection limits, see Kinesis Video Streams Limits.

  • A Kinesis video stream can have a maximum of five active HLS streaming sessions. If a new session is created when the maximum number of sessions is already active, the oldest (earliest created) session is closed. The number of active GetMedia connections on a Kinesis video stream does not count against this limit, and the number of active HLS sessions does not count against the active GetMedia connection limit.

You can monitor the amount of data that the media player consumes by monitoring the GetMP4MediaFragment.OutgoingBytes Amazon CloudWatch metric. For information about using CloudWatch to monitor Kinesis Video Streams, see Monitoring Kinesis Video Streams. For pricing information, see Amazon Kinesis Video Streams Pricing and AWS Pricing. Charges for both HLS sessions and outgoing AWS data apply.

For more information about HLS, see HTTP Live Streaming on the Apple Developer site.

Examples:

Request syntax with placeholder values


resp = client.get_hls_streaming_session_url({
  stream_name: "StreamName",
  stream_arn: "ResourceARN",
  playback_mode: "LIVE", # accepts LIVE, ON_DEMAND
  hls_fragment_selector: {
    fragment_selector_type: "PRODUCER_TIMESTAMP", # accepts PRODUCER_TIMESTAMP, SERVER_TIMESTAMP
    timestamp_range: {
      start_timestamp: Time.now,
      end_timestamp: Time.now,
    },
  },
  discontinuity_mode: "ALWAYS", # accepts ALWAYS, NEVER
  expires: 1,
  max_media_playlist_fragment_results: 1,
})

Response structure


resp.hls_streaming_session_url #=> String

Options Hash (options):

  • :stream_name (String)

    The name of the stream for which to retrieve the HLS master playlist URL.

    You must specify either the StreamName or the StreamARN.

  • :stream_arn (String)

    The Amazon Resource Name (ARN) of the stream for which to retrieve the HLS master playlist URL.

    You must specify either the StreamName or the StreamARN.

  • :playback_mode (String)

    Whether to retrieve live or archived, on-demand data.

    Features of the two types of session include the following:

    • LIVE : For sessions of this type, the HLS media playlist is continually updated with the latest fragments as they become available. We recommend that the media player retrieve a new playlist on a one-second interval. When this type of session is played in a media player, the user interface typically displays a \"live\" notification, with no scrubber control for choosing the position in the playback window to display.

      In LIVE mode, the newest available fragments are included in an HLS media playlist, even if there is a gap between fragments (that is, if a fragment is missing). A gap like this might cause a media player to halt or cause a jump in playback. In this mode, fragments are not added to the HLS media playlist if they are older than the newest fragment in the playlist. If the missing fragment becomes available after a subsequent fragment is added to the playlist, the older fragment is not added, and the gap is not filled.

    • ON_DEMAND : For sessions of this type, the HLS media playlist contains all the fragments for the session, up to the number that is specified in MaxMediaPlaylistFragmentResults. The playlist must be retrieved only once for each session. When this type of session is played in a media player, the user interface typically displays a scrubber control for choosing the position in the playback window to display.

    In both playback modes, if FragmentSelectorType is PRODUCER_TIMESTAMP, and if there are multiple fragments with the same start time stamp, the fragment that has the larger fragment number (that is, the newer fragment) is included in the HLS media playlist. The other fragments are not included. Fragments that have different time stamps but have overlapping durations are still included in the HLS media playlist. This can lead to unexpected behavior in the media player.

    The default is LIVE.

  • :hls_fragment_selector (Types::HLSFragmentSelector)

    The time range of the requested fragment, and the source of the time stamps.

    This parameter is required if PlaybackMode is ON_DEMAND. This parameter is optional if PlaybackMode is LIVE. If PlaybackMode is LIVE, the FragmentSelectorType can be set, but the TimestampRange should not be set. If PlaybackMode is ON_DEMAND, both FragmentSelectorType and TimestampRange must be set.

  • :discontinuity_mode (String)

    Specifies when flags marking discontinuities between fragments will be added to the media playlists. The default is ALWAYS when HLSFragmentSelector is SERVER_TIMESTAMP, and NEVER when it is PRODUCER_TIMESTAMP.

    Media players typically build a timeline of media content to play, based on the time stamps of each fragment. This means that if there is any overlap between fragments (as is typical if HLSFragmentSelector is SERVER_TIMESTAMP), the media player timeline has small gaps between fragments in some places, and overwrites frames in other places. When there are discontinuity flags between fragments, the media player is expected to reset the timeline, resulting in the fragment being played immediately after the previous fragment. We recommend that you always have discontinuity flags between fragments if the fragment time stamps are not accurate or if fragments might be missing. You should not place discontinuity flags between fragments for the player timeline to accurately map to the producer time stamps.

  • :expires (Integer)

    The time in seconds until the requested session expires. This value can be between 300 (5 minutes) and 43200 (12 hours).

    When a session expires, no new calls to GetHLSMasterPlaylist, GetHLSMediaPlaylist, GetMP4InitFragment, or GetMP4MediaFragment can be made for that session.

    The default is 300 (5 minutes).

  • :max_media_playlist_fragment_results (Integer)

    The maximum number of fragments that are returned in the HLS media playlists.

    When the PlaybackMode is LIVE, the most recent fragments are returned up to this value. When the PlaybackMode is ON_DEMAND, the oldest fragments are returned, up to this maximum number.

    When there are a higher number of fragments available in a live HLS media playlist, video players often buffer content before starting playback. Increasing the buffer size increases the playback latency, but it decreases the likelihood that rebuffering will occur during playback. We recommend that a live HLS media playlist have a minimum of 3 fragments and a maximum of 10 fragments.

    The default is 5 fragments if PlaybackMode is LIVE, and 1,000 if PlaybackMode is ON_DEMAND.

    The maximum value of 1,000 fragments corresponds to more than 16 minutes of video on streams with 1-second fragments, and more than 2 1/2 hours of video on streams with 10-second fragments.

Returns:

See Also:

#get_media_for_fragment_list(options = {}) ⇒ Types::GetMediaForFragmentListOutput

Gets media for a list of fragments (specified by fragment number) from the archived data in an Amazon Kinesis video stream.

The following limits apply when using the GetMediaForFragmentList API:

  • A client can call GetMediaForFragmentList 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 GetMediaForFragmentList session.

Examples:

Request syntax with placeholder values


resp = client.get_media_for_fragment_list({
  response_target: "/path/to/file", # where to write response data, file path, or IO object
  stream_name: "StreamName", # required
  fragments: ["FragmentNumberString"], # required
})

Response structure


resp.content_type #=> String
resp.payload #=> IO

Options Hash (options):

  • :response_target (IO, String)

    Specifies where to stream response data. You can provide the path where a file will be created on disk, or you can provide an IO object. If omitted, the response data will be loaded into memory and written to a StringIO object.

  • :stream_name (required, String)

    The name of the stream from which to retrieve fragment media.

  • :fragments (required, Array<String>)

    A list of the numbers of fragments for which to retrieve media. You retrieve these values with ListFragments.

Returns:

See Also:

#list_fragments(options = {}) ⇒ Types::ListFragmentsOutput

Returns a list of Fragment objects from the specified stream and start location within the archived data.

Examples:

Request syntax with placeholder values


resp = client.list_fragments({
  stream_name: "StreamName", # required
  max_results: 1,
  next_token: "String",
  fragment_selector: {
    fragment_selector_type: "PRODUCER_TIMESTAMP", # required, accepts PRODUCER_TIMESTAMP, SERVER_TIMESTAMP
    timestamp_range: { # required
      start_timestamp: Time.now, # required
      end_timestamp: Time.now, # required
    },
  },
})

Response structure


resp.fragments #=> Array
resp.fragments[0].fragment_number #=> String
resp.fragments[0].fragment_size_in_bytes #=> Integer
resp.fragments[0].producer_timestamp #=> Time
resp.fragments[0].server_timestamp #=> Time
resp.fragments[0].fragment_length_in_milliseconds #=> Integer
resp.next_token #=> String

Options Hash (options):

  • :stream_name (required, String)

    The name of the stream from which to retrieve a fragment list.

  • :max_results (Integer)

    The total number of fragments to return. If the total number of fragments available is more than the value specified in max-results, then a ListFragmentsOutput$NextToken is provided in the output that you can use to resume pagination.

  • :next_token (String)

    A token to specify where to start paginating. This is the ListFragmentsOutput$NextToken from a previously truncated response.

  • :fragment_selector (Types::FragmentSelector)

    Describes the time stamp range and time stamp origin for the range of fragments to return.

Returns:

See Also:

#wait_until(waiter_name, params = {}) {|waiter| ... } ⇒ Boolean

Waiters polls an API operation until a resource enters a desired state.

Basic Usage

Waiters will poll until they are succesful, they fail by entering a terminal state, or until a maximum number of attempts are made.

# polls in a loop, sleeping between attempts client.waiter_until(waiter_name, params)

Configuration

You can configure the maximum number of polling attempts, and the delay (in seconds) between each polling attempt. You configure waiters by passing a block to #wait_until:

# poll for ~25 seconds
client.wait_until(...) do |w|
  w.max_attempts = 5
  w.delay = 5
end

Callbacks

You can be notified before each polling attempt and before each delay. If you throw :success or :failure from these callbacks, it will terminate the waiter.

started_at = Time.now
client.wait_until(...) do |w|

  # disable max attempts
  w.max_attempts = nil

  # poll for 1 hour, instead of a number of attempts
  w.before_wait do |attempts, response|
    throw :failure if Time.now - started_at > 3600
  end

end

Handling Errors

When a waiter is successful, it returns true. When a waiter fails, it raises an error. All errors raised extend from Waiters::Errors::WaiterFailed.

begin
  client.wait_until(...)
rescue Aws::Waiters::Errors::WaiterFailed
  # resource did not enter the desired state in time
end

Parameters:

  • waiter_name (Symbol)

    The name of the waiter. See #waiter_names for a full list of supported waiters.

  • params (Hash) (defaults to: {})

    Additional request parameters. See the #waiter_names for a list of supported waiters and what request they call. The called request determines the list of accepted parameters.

Yield Parameters:

Returns:

  • (Boolean)

    Returns true if the waiter was successful.

Raises:

  • (Errors::FailureStateError)

    Raised when the waiter terminates because the waiter has entered a state that it will not transition out of, preventing success.

  • (Errors::TooManyAttemptsError)

    Raised when the configured maximum number of attempts have been made, and the waiter is not yet successful.

  • (Errors::UnexpectedError)

    Raised when an error is encounted while polling for a resource that is not expected.

  • (Errors::NoSuchWaiterError)

    Raised when you request to wait for an unknown state.

#waiter_namesArray<Symbol>

Returns the list of supported waiters. The following table lists the supported waiters and the client method they call:

Waiter NameClient MethodDefault Delay:Default Max Attempts:

Returns:

  • (Array<Symbol>)

    the list of supported waiters.