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api_op_GetHLSStreamingSessionURL.go
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api_op_GetHLSStreamingSessionURL.go
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// Code generated by smithy-go-codegen DO NOT EDIT.
package kinesisvideoarchivedmedia
import (
"context"
"fmt"
awsmiddleware "github.com/aws/aws-sdk-go-v2/aws/middleware"
"github.com/aws/aws-sdk-go-v2/service/kinesisvideoarchivedmedia/types"
"github.com/aws/smithy-go/middleware"
smithyhttp "github.com/aws/smithy-go/transport/http"
)
// 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.
//
// Both the StreamName and the StreamARN parameters are optional, but you must
// specify either the StreamName or the StreamARN when invoking this API operation.
//
// An Amazon Kinesis video stream has the following requirements for providing
// data through HLS:
//
// - For streaming video, the media must contain H.264 or H.265 encoded video
// and, optionally, AAC encoded audio. Specifically, the codec ID of track 1 should
// be V_MPEG/ISO/AVC (for H.264) or V_MPEG/ISO/HEVC (for H.265). Optionally, the
// codec ID of track 2 should be A_AAC . For audio only streaming, the codec ID
// of track 1 should be A_AAC .
//
// - Data retention must be greater than 0.
//
// - The video track of each fragment must contain codec private data in the
// Advanced Video Coding (AVC) for H.264 format or HEVC for H.265 format ([MPEG-4 specification ISO/IEC 14496-15] ). For
// information about adapting stream data to a given format, see [NAL Adaptation Flags].
//
// - The audio track (if present) of each fragment must contain codec private
// data in the AAC format ([AAC specification ISO/IEC 13818-7] ).
//
// Kinesis Video Streams HLS sessions contain fragments in the fragmented MPEG-4
// form (also called fMP4 or CMAF) or 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:
//
// - Get an endpoint using [GetDataEndpoint], specifying GET_HLS_STREAMING_SESSION_URL for the
// APIName parameter.
//
// - 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 Amazon Web Services 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 bitrates) is made available.
//
// - 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
// or audio decoder and renderer. The media fragments contain H.264-encoded video
// frames or AAC-encoded audio samples.
//
// - 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 for each track, and additional metadata
// for the media player, including estimated bitrate 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 . There is a distinct HLS
// media playlist for the video track and the audio track (if applicable) that
// contains MP4 media URLs for the specific track.
//
// - 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 and
// respective track, which the media player needs to decode the media frames.
//
// - GetMP4MediaFragment: Retrieves MP4 media fragments. These fragments contain
// the " moof " and " mdat " MP4 atoms and their child atoms, containing the
// encoded fragment's media frames and their timestamps.
//
// For the HLS streaming session, in-track codec private data (CPD) changes are
//
// supported. After the first media fragment is made available in a streaming
// session, fragments can contain CPD changes for each track. Therefore, the
// fragments in a session can have a different resolution, bit rate, or other
// information in the CPD without interrupting playback. However, any change made
// in the track number or track codec format can return an error when those
// different media fragments are loaded. For example, streaming will fail if the
// fragments in the stream change from having only video to having both audio and
// video, or if an AAC audio track is changed to an ALAW audio track. For each
// streaming session, only 500 CPD changes are allowed.
//
// Data retrieved with this action is billable. For information, see [Pricing].
//
// - GetTSFragment: Retrieves MPEG TS fragments containing both initialization
// and media data for all tracks in the stream.
//
// If the ContainerFormat is MPEG_TS , this API is used instead of
//
// GetMP4InitFragment and GetMP4MediaFragment to retrieve stream media.
//
// Data retrieved with this action is billable. For more information, see [Kinesis Video Streams pricing].
//
// A streaming session URL must 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].
//
// 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 [Amazon Web Services Pricing]. Charges for both HLS sessions and outgoing Amazon Web
// Services data apply.
//
// For more information about HLS, see [HTTP Live Streaming] on the [Apple Developer site].
//
// If an error is thrown after invoking a Kinesis Video Streams archived 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 Amazon Web
// Services, 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].
//
// [Amazon Web Services Pricing]: https://aws.amazon.com/pricing/
// [Common Errors]: https://docs.aws.amazon.com/kinesisvideostreams/latest/dg/CommonErrors.html
// [Kinesis Video Streams Limits]: http://docs.aws.amazon.com/kinesisvideostreams/latest/dg/limits.html
// [MPEG-4 specification ISO/IEC 14496-15]: https://www.iso.org/standard/55980.html
// [HLS specification]: https://tools.ietf.org/html/draft-pantos-http-live-streaming-23
// [AAC specification ISO/IEC 13818-7]: https://www.iso.org/standard/43345.html
// [HTTP Live Streaming]: https://developer.apple.com/streaming/
// [NAL Adaptation Flags]: http://docs.aws.amazon.com/kinesisvideostreams/latest/dg/producer-reference-nal.html
// [Apple Developer site]: https://developer.apple.com
// [Kinesis Video Streams pricing]: https://aws.amazon.com/kinesis/video-streams/pricing/
// [Pricing]: https://aws.amazon.com/kinesis/video-streams/pricing/
// [Amazon Kinesis Video Streams Pricing]: https://aws.amazon.com/kinesis/video-streams/pricing/
// [Monitoring Kinesis Video Streams]: http://docs.aws.amazon.com/kinesisvideostreams/latest/dg/monitoring.html
// [GetDataEndpoint]: http://docs.aws.amazon.com/kinesisvideostreams/latest/dg/API_GetDataEndpoint.html
func (c *Client) GetHLSStreamingSessionURL(ctx context.Context, params *GetHLSStreamingSessionURLInput, optFns ...func(*Options)) (*GetHLSStreamingSessionURLOutput, error) {
if params == nil {
params = &GetHLSStreamingSessionURLInput{}
}
result, metadata, err := c.invokeOperation(ctx, "GetHLSStreamingSessionURL", params, optFns, c.addOperationGetHLSStreamingSessionURLMiddlewares)
if err != nil {
return nil, err
}
out := result.(*GetHLSStreamingSessionURLOutput)
out.ResultMetadata = metadata
return out, nil
}
type GetHLSStreamingSessionURLInput struct {
// Specifies which format should be used for packaging the media. Specifying the
// FRAGMENTED_MP4 container format packages the media into MP4 fragments (fMP4 or
// CMAF). This is the recommended packaging because there is minimal packaging
// overhead. The other container format option is MPEG_TS . HLS has supported MPEG
// TS chunks since it was released and is sometimes the only supported packaging on
// older HLS players. MPEG TS typically has a 5-25 percent packaging overhead. This
// means MPEG TS typically requires 5-25 percent more bandwidth and cost than fMP4.
//
// The default is FRAGMENTED_MP4 .
ContainerFormat types.ContainerFormat
// Specifies when flags marking discontinuities between fragments are added to the
// media playlists.
//
// Media players typically build a timeline of media content to play, based on the
// timestamps of each fragment. This means that if there is any overlap or gap
// between fragments (as is typical if HLSFragmentSelectoris set to SERVER_TIMESTAMP ), the media
// player timeline will also have small gaps between fragments in some places, and
// will overwrite frames in other places. Gaps in the media player timeline can
// cause playback to stall and overlaps can cause playback to be jittery. When
// there are discontinuity flags between fragments, the media player is expected to
// reset the timeline, resulting in the next fragment being played immediately
// after the previous fragment.
//
// The following modes are supported:
//
// - ALWAYS : a discontinuity marker is placed between every fragment in the HLS
// media playlist. It is recommended to use a value of ALWAYS if the fragment
// timestamps are not accurate.
//
// - NEVER : no discontinuity markers are placed anywhere. It is recommended to
// use a value of NEVER to ensure the media player timeline most accurately maps
// to the producer timestamps.
//
// - ON_DISCONTINUITY : a discontinuity marker is placed between fragments that
// have a gap or overlap of more than 50 milliseconds. For most playback scenarios,
// it is recommended to use a value of ON_DISCONTINUITY so that the media player
// timeline is only reset when there is a significant issue with the media timeline
// (e.g. a missing fragment).
//
// The default is ALWAYS when HLSFragmentSelector is set to SERVER_TIMESTAMP , and NEVER when it is
// set to PRODUCER_TIMESTAMP .
DiscontinuityMode types.HLSDiscontinuityMode
// Specifies when the fragment start timestamps should be included in the HLS
// media playlist. Typically, media players report the playhead position as a time
// relative to the start of the first fragment in the playback session. However,
// when the start timestamps are included in the HLS media playlist, some media
// players might report the current playhead as an absolute time based on the
// fragment timestamps. This can be useful for creating a playback experience that
// shows viewers the wall-clock time of the media.
//
// The default is NEVER . When HLSFragmentSelector is SERVER_TIMESTAMP , the timestamps will be the
// server start timestamps. Similarly, when HLSFragmentSelectoris PRODUCER_TIMESTAMP , the timestamps
// will be the producer start timestamps.
DisplayFragmentTimestamp types.HLSDisplayFragmentTimestamp
// 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 , GetMP4MediaFragment , or
// GetTSFragment can be made for that session.
//
// The default is 300 (5 minutes).
Expires *int32
// The time range of the requested fragment and the source of the timestamps.
//
// This parameter is required if PlaybackMode is ON_DEMAND or LIVE_REPLAY . 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 or LIVE_REPLAY , both FragmentSelectorType and
// TimestampRange must be set.
HLSFragmentSelector *types.HLSFragmentSelector
// 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 or LIVE_REPLAY , and 1,000 if
// PlaybackMode is ON_DEMAND .
//
// The maximum value of 5,000 fragments corresponds to more than 80 minutes of
// video on streams with 1-second fragments, and more than 13 hours of video on
// streams with 10-second fragments.
MaxMediaPlaylistFragmentResults *int64
// Whether to retrieve live, live replay, or archived, on-demand data.
//
// Features of the three types of sessions 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.
//
// - LIVE_REPLAY : For sessions of this type, the HLS media playlist is updated
// similarly to how it is updated for LIVE mode except that it starts by
// including fragments from a given start time. Instead of fragments being added as
// they are ingested, fragments are added as the duration of the next fragment
// elapses. For example, if the fragments in the session are two seconds long, then
// a new fragment is added to the media playlist every two seconds. This mode is
// useful to be able to start playback from when an event is detected and continue
// live streaming media that has not yet been ingested as of the time of the
// session creation. This mode is also useful to stream previously archived media
// without being limited by the 1,000 fragment limit in the ON_DEMAND mode.
//
// - 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 all playback modes, if FragmentSelectorType is PRODUCER_TIMESTAMP , and if
// there are multiple fragments with the same start timestamp, the fragment that
// has the largest fragment number (that is, the newest fragment) is included in
// the HLS media playlist. The other fragments are not included. Fragments that
// have different timestamps 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 .
PlaybackMode types.HLSPlaybackMode
// 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 .
StreamARN *string
// The name of the stream for which to retrieve the HLS master playlist URL.
//
// You must specify either the StreamName or the StreamARN .
StreamName *string
noSmithyDocumentSerde
}
type GetHLSStreamingSessionURLOutput struct {
// The URL (containing the session token) that a media player can use to retrieve
// the HLS master playlist.
HLSStreamingSessionURL *string
// Metadata pertaining to the operation's result.
ResultMetadata middleware.Metadata
noSmithyDocumentSerde
}
func (c *Client) addOperationGetHLSStreamingSessionURLMiddlewares(stack *middleware.Stack, options Options) (err error) {
if err := stack.Serialize.Add(&setOperationInputMiddleware{}, middleware.After); err != nil {
return err
}
err = stack.Serialize.Add(&awsRestjson1_serializeOpGetHLSStreamingSessionURL{}, middleware.After)
if err != nil {
return err
}
err = stack.Deserialize.Add(&awsRestjson1_deserializeOpGetHLSStreamingSessionURL{}, middleware.After)
if err != nil {
return err
}
if err := addProtocolFinalizerMiddlewares(stack, options, "GetHLSStreamingSessionURL"); err != nil {
return fmt.Errorf("add protocol finalizers: %v", err)
}
if err = addlegacyEndpointContextSetter(stack, options); err != nil {
return err
}
if err = addSetLoggerMiddleware(stack, options); err != nil {
return err
}
if err = addClientRequestID(stack); err != nil {
return err
}
if err = addComputeContentLength(stack); err != nil {
return err
}
if err = addResolveEndpointMiddleware(stack, options); err != nil {
return err
}
if err = addComputePayloadSHA256(stack); err != nil {
return err
}
if err = addRetry(stack, options); err != nil {
return err
}
if err = addRawResponseToMetadata(stack); err != nil {
return err
}
if err = addRecordResponseTiming(stack); err != nil {
return err
}
if err = addClientUserAgent(stack, options); err != nil {
return err
}
if err = smithyhttp.AddErrorCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = smithyhttp.AddCloseResponseBodyMiddleware(stack); err != nil {
return err
}
if err = addSetLegacyContextSigningOptionsMiddleware(stack); err != nil {
return err
}
if err = stack.Initialize.Add(newServiceMetadataMiddleware_opGetHLSStreamingSessionURL(options.Region), middleware.Before); err != nil {
return err
}
if err = addRecursionDetection(stack); err != nil {
return err
}
if err = addRequestIDRetrieverMiddleware(stack); err != nil {
return err
}
if err = addResponseErrorMiddleware(stack); err != nil {
return err
}
if err = addRequestResponseLogging(stack, options); err != nil {
return err
}
if err = addDisableHTTPSMiddleware(stack, options); err != nil {
return err
}
return nil
}
func newServiceMetadataMiddleware_opGetHLSStreamingSessionURL(region string) *awsmiddleware.RegisterServiceMetadata {
return &awsmiddleware.RegisterServiceMetadata{
Region: region,
ServiceID: ServiceID,
OperationName: "GetHLSStreamingSessionURL",
}
}