AWS SDK Version 3 for .NET
API Reference

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Interface for accessing KinesisVideoArchivedMedia

Inheritance Hierarchy

Amazon.KinesisVideoArchivedMedia.IAmazonKinesisVideoArchivedMedia

Namespace: Amazon.KinesisVideoArchivedMedia
Assembly: AWSSDK.KinesisVideoArchivedMedia.dll
Version: 3.x.y.z

Syntax

C#
public interface IAmazonKinesisVideoArchivedMedia
         IAmazonService, IDisposable

The IAmazonKinesisVideoArchivedMedia type exposes the following members

Methods

Note:

Asynchronous operations (methods ending with Async) in the table below are for .NET 4.5 or higher. For .NET 3.5 the SDK follows the standard naming convention of BeginMethodName and EndMethodName to indicate asynchronous operations - these method pairs are not shown in the table below.

NameDescription
Public Method GetHLSStreamingSessionURL(GetHLSStreamingSessionURLRequest)

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.

Public Method GetHLSStreamingSessionURLAsync(GetHLSStreamingSessionURLRequest, CancellationToken)

Initiates the asynchronous execution of the GetHLSStreamingSessionURL operation.

Public Method GetMediaForFragmentList(GetMediaForFragmentListRequest)

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.

Public Method GetMediaForFragmentListAsync(GetMediaForFragmentListRequest, CancellationToken)

Initiates the asynchronous execution of the GetMediaForFragmentList operation.

Public Method ListFragments(ListFragmentsRequest)

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

Public Method ListFragmentsAsync(ListFragmentsRequest, CancellationToken)

Initiates the asynchronous execution of the ListFragments operation.

Version Information

.NET Standard:
Supported in: 1.3

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms