Dev camp2012jpn day2session2

Developer Camp
2012 Japan Fall

10.4 Thu – 5 Fri
渋谷ヒカリエ

マルチデバイスへの動画配信
サービス～ Windows Azure
Media Services とは～
日本マイクロソフト株式会社
通信メディア統括本部
ソリューションスペシャリスト
畠山大有

本セッションの目的
• Windows Azure Media Services で
動画配信アプリケーションを開発する方法を理解します。

• 動画配信そのものについては取り扱いません。

• 本セッションは、2012年6月リリースの public beta の仕様
に基づきます。今後、予告なく変更される可能性が
ありますのでご注意ください。

Developer Camp | 2012 Japan Fall

本日の内容
• Windows Azure Media Services を知る
• Windows Azure Media Services 開発の ”イロハ”


Windows Azure Media Services

を知る

• 拡張可能なマルチテナントのメディア配信
プラットフォーム
• クラウド上への
Microsoft Media Platform 実装
• パートナーエコシステム
• エンコーディング/パッケージング
• セキュリティ
• マルチデバイス
• オンデマンド / ライブ
• REST API

動画配信のワークフロー


パートナーエコシステム
ISV

Encoding/ Content Origin &
Ingest
Transcoding Protection CDN

アーキテクチャ (VOD)
Compute
Storage



開発の”イロハ”

コードを書く前に必要な事


Media Services アカウント作成


開発環境の準備
• Windows 7, Windows 8, Windows 2008 R2
• .NET Framework 3.5 SP1, .NET Framework 4
• Visual Studio 2010 SP1
• Windows Azure SDK 1.6 (November 2011)
• Windows Azure Media Services SDK (June 2012 Preview)
• WCF Data Services 5.0 for OData V3

• http://msdn.microsoft.com/en-us/library/hh973620.aspx


Visual Studio の設定
• アセンブリ参照
• Microsoft.WindowsAzure.MediaServices.Management.Sdk.dll
• %ProgramFiles(x86)%¥Microsoft SDKs¥Windows Azure Media Services¥Services¥v1.0


Sample Player の準備
• Smooth Streaming
• Microsoft Media Platform: Player Framework
• Windows 8: http://playerframework.codeplex.com/releases/view/94684
• Silverlight: http://smf.codeplex.com/releases/view/88970

• HTML5 <video> (iOS用)
<video width="640"
height="480"
src="http://<your url>/hogehoge.mp4"
autoplay controls >
ご利用の Web ブラウザーでは再生できません
</video>

Media Services SDK for .NET
Microsoft.WindowsAzure.MediaServices.Client.

CloudMediaContext サービスとのセッション

Assets コンテンツの集合体(ファイル)

Jobs / Tasks エンコードなどのメディア処理

MediaProcessors メディア処理アプリ定義

Locators 配布/配信ポイント

AccessPolicies 配布/配信公開ポリシー


コーディングの流れ


Ingest – Processing – Delivery : sample code

Demo

接続
• Windows Azure Media Servicesとの全てのやりとりは、
CloudMediaContext クラスを通じて

• 注意点
• CloudMediaContext はスレッドセーフではない

CloudMediaContext context = new CloudMediaContext(
ConfigurationManager.AppSettings["accountName"],
ConfigurationManager.AppSettings["accountKey"]
);

Ingest
Ingest
• Asset作成 = Windows Azure Media Services 管理下に、
ファイルを置く
• ファイルのアップロード
• 別の Blob からのコピーも可能
• Asset に書き込み可能な SAS URLを作成し、それを元に
Containerを作成する
• http://social.msdn.microsoft.com/Forums/en-US/MediaServices/thread/be486bac-ac37-4984-87d0-
20931fcb1328

• 2つの暗号化オプション: AES 256bit / Common Encryption

Ingest – sample code
Ingest
context.Assets.OnUploadProgress += new
EventHandler<UploadProgressEventArgs>(Assets_OnUploadProgress);

IAsset ingestAsset =
context.Assets.Create(@"D:¥MediaServices¥Contents¥file.wmv“,
AssetCreationOptions.StorageEncrypted);

void Assets_OnUploadProgress(object sender, UploadProgressEventArgs e)
{
Console.WriteLine(" 経過{0:0.0}%", e.Progress);
}


Manage
Ingest
• Asset / Job / AccessPolicy の管理
• 実際には Windows Azure SQL database 上で管理
• LINQ サポート

• 注意点
• オブジェクトのリファレンスは自動リフレッシュ
しないため、都度、再クエリが必要


Manage: Asset
Ingest
• Windows Azure Blob コンテナ
• アプリケーション的なメタは持っていない
• Asset. AlternateId にてCMS連携 ID Name Title Artist

0001 Contoso Great Video Art #1

Id AlternateId Name

• 削除する際の注意点 <guid> 0001 contoso

• 関連する Locator は個別削除が必要
• AssetCreationOptions.CommonEncryptionProtected 指定をした
Asset を削除する場合は、ContentsKey の個別削除が必須

Process
Ingest

• エンコードなどのメディア処理の実行単位
• Job に、n個の Task を作成
Input Asset
• Job がコマンド発行の単位
• 開始/キャンセル/終了/エラーなど Task
Output
• 入力/出力ファイル Asset
Job
• 処理は非同期で Input Asset
• ファイル同士の依存関係がないと Task
Task は並列実行。あると直列実行 Output
Asset


Process: Windows Azure Media Encoder
Ingest
• Expression Encoder 4 Pro SP2 がベース
• Azure に最適化
• Adaptive Bitrate Streamingでは、複数VMを使う
• タスクプリセット指定
• http://msdn.microsoft.com/en-us/library/jj129582.aspx
• 「現在」は、Expression Encoder 4 Pro SP2 の
カスタムタスクプリセット (XML文字列) も動作する!
• サムネイル作成, 時間指定の切り出しなど


Ingest
• サポートしているファイルフォーマット
• 3GPP, 3GPP2
• Advanced Systems Format (ASF)
• Advanced Video Coding High Definition (AVCHD) [MPEG-2 Transport
Stream]
• Audio-Video Interleaved (AVI)
• AviSynth
• Digital camcorder MPEG-2 (MOD)
• Digital video (DV) camera file • AC-3 (Dolby Digital) audio
• DVD transport stream (TS) file • Audio Interchange File Format (AIFF)
• DVD video object (VOB) file • Broadcast Wave Format
• Expression Encoder Screen Capture Codec file • MP3 (MPEG-1 Audio Layer 3)
• MP4
• MP4 audio
• MPEG-1 System Stream
• MPEG-2 video file • MPEG-4 audio book
• Smooth Streaming File Format (PIFF 1.3) • WAVE file
• Windows Media Video (WMV) • Windows Media Audio

ビデオオーディオ

Ingest
• サポートしているコーデック

• H.264
• MPEG-1 • AC-3 (Dolby Digital audio)
• MPEG-2 • Advanced Audio Coding (AAC)
• VC-1 • MP3 (MPEG-1 Audio Layer 3)
• Windows Media Video • Windows Media Audio

ビデオオーディオ

Process: Windows Azure Media Packager / Encryptor

Ingest
• IIS Transform Manager 1.0 がベース

• Media Processor 定義 + 設定XML文字列
• PlayReady Protection Task
• MP4 to Smooth Streams Task
• Smooth Streams to HLS Conversion Task
• Storage Decyption
• http://msdn.microsoft.com/en-us/library/jj129580.aspx#get_media_processor


Process – sample code (1)
Ingest
IJob job = context.Jobs.Create("WMV to SS and HLS");
IMediaProcessor windowsAzureMediaEncoder = (from a in context.MediaProcessors
where a.Name == “Windows Azure Media Encoder”
select a).First();
ITask WMS2SSTask = job.Tasks.AddNew("WMV to Smooth Streaming",
windowsAzureMediaEncoder,
"H.264 IIS Smooth Streaming iPhone WiFi",
TaskCreationOptions.None);

// 入出力ファイル
WMS2SSTask.InputMediaAssets.Add(ingestAsset);
IAsset SSedAssed = WMS2SSTask.OutputMediaAssets.AddNew(”SmoothStreaming",
true,
AssetCreationOptions.None);
job.Submit();


Process – sample code (2)
Ingest
bool jobFinalize = false;
while (!jobFinalize) {
job = (from j in context.Jobs
where j.Id == job.Id
select j).FirstOrDefault();
Console.WriteLine(" ***: {0}", job.State.ToString());

switch (job.State) {
case JobState.Finished:
jobFinalize = true;
Console.WriteLine(" 正常終了: {0}", job.RunningDuration);
break;
case JobState.Error:
jobFinalize = true;
Console.WriteLine(" エラー発生: {0}", job.Tasks[0].ErrorDetails);
break;
default:
Console.WriteLine(" 15秒間待機します: {0}", DateTime.Now.ToLongTimeString());
System.Threading.Thread.Sleep(15000);
break;
}
}


Delivery
Ingest
• ストリーミング / ダウンロードのオリジンサーバー
• Locator に Asset 単位で割り当てる
• 1 つの Asset につき 5つの Locator が上限
• AccessPolicyによって、時間単位での公開を設定
• アクセス権設定ではない


Delivery – sample code
Ingest
IAccessPolicy accessPolicy = context.AccessPolicies.Create("Streaming",
TimeSpan.FromHours(3),
AccessPermissions.Read | AccessPermissions.List);

/// *** 配信サーバー設定
ILocator SS_StreamingPointLocator =
context.Locators.CreateOriginLocator(job.OutputMediaAssets[0],
accessPolicy);

string SS_StreaingPointPath = SS_StreamingPointLocator.Path +
(from ism in job.OutputMediaAssets[0].Files
where ism.Name.EndsWith(".ism")
select ism).FirstOrDefault().Name
+ "/manifest";


Windows 8, Mac OS, iOS へ配信

Demo

Live Origin / Delivery (TAP)

• IIS Media Services 4.1 ベース
• 状態管理
• Allocation – Start / Stop / Shutdown
• ヘルスチェック
• アーカイブ
• Blob Storage へ
• IP Filtering


まとめ
Quick and Easy
シンプルなAPI
PaaS

Open and Flexible
様々な Partner Application
様々なAPI: REST, .NET, Java, PHP

Powerful and Cost Effective
進化し続けるCloud インフラのメリットを直接共有
Capex / Opex の最小化


ご参考リソース
• MSDN Online: Windows Azure Media Services:

• ScottGu’s Blog: Windows Azure Media Services and London
2012 Olympics
• http://weblogs.asp.net/scottgu/archive/2012/08/21/windows-azure-
media-services-and-the-london-2012-olympics.aspx


© 2012 Microsoft Corporation. All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.
The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of
Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

Media Services APIs and SDKs
• REST API for all platforms, using OData 3.0
Simple to write your own client libraries using REST API and
standard HTTP verbs (GET, POST, PUT, DELETE)
•

•
.NET library available in Preview
Future - JAVA library available in Fall
• Open Libraries available with source code (Apache 2 license) on GitHub


On-Demand Workflow
• Ingest
• Encode
• Package
• Encrypt
• Deliver


Ingest
Ingest Assets into the Media Services
Pre-encrypt files prior to uploading(AES 256)

Secure HTTPS upload

Network level peering for fast HTTP into Azure

Fast upload using UDP with Aspera

Bulk ingest support


Encode
Windows Azure Media Encoder
Supports encoding to H.264 or VC-1 video

Encodes audio to AAC-LC, HE-AAC, Dolby DD+, WMA

Packages to MP4, HLS, Smooth Streaming, HDS, WMV

Encrypts with PlayReady, Common Encryption, AES

Encoding with third-parties

Partner SDK for enabling ‘build-in’ encoders


Package


Encrypt


Deliver


Target

MP4


API Entities


Assets
The logical unit that represents a single
audiovisual presentation in Media Services

An asset contains a collection of one to many
media files


An Asset Is….
• An asset should be considered a single version
or derivative of an audiovisual presentation

• Examples:
• a full movie, TV show, specific edit
• a clip from a movie, TV show, animation, camera ISO
file, event, etc..
• a movie trailer or promotional video
• an advertisement
• an audio file, radio show, podcast, sound file, etc…


An Asset Is NOT….
• A folder to organize and store multiple
versions of the same presentation in
• For example, you would never use an Asset to
store the Movie, its trailer, an advertisement,
and an international edit version of the same
movie in a single Asset
•
A folder for submitting batch processing of
multiple audiovisual presentations to
Azure Media Encoder


Access Policies
Access Policies define the permissions and duration of
access to an Asset

Controls Read/Write semantics

Controls duration in minutes that a URL has access

Future expansion for more policy settings; IP white-
listing, Geo-restriction, Identity/Group access, etc…


Content Keys
Encryption information (AES Content Key,
X.509 certificate) for protected assets

Assets can be either:
“storage encrypted” (256-bit key) to protect them at
rest
“common encrypted” (128-bit key) for DRM delivery.

Assets are storage encrypted by default


Files
Actual video, audio, image, or metadata
blobs stored in your Azure storage account

Source files are often referred to as
“Mezzanine” files


Locators
A Locator is a URI that provides time-based access
to a specific asset

It is used with an AccessPolicy to define the
permissions and duration that a client has access to
a given Asset

Locators can be used to generate SAS URLs, Origin
Server URLs , CDN URLs, 3rd party origin URLs, etc…


Jobs
A job is an “workflow” in Media Services that
can be scheduled, monitored and canceled

The Job entity holds metadata about Tasks,
which do processing on the files in an Asset

A job always has one or more associated
inputs, tasks, and outputs


Job Templates
A JobTemplate provides reusable
settings for Jobs that need to be run
repeatedly

JobTemplates can be saved from
existing Jobs for re-use


Tasks
A Task is an individual operation of work on an
Asset and is defined in a Job

Tasks point to “Media Processors” that can be
either first or third party

Each Task has its own configuration and can be
scheduled to run sequentially or in parallel


Dev camp2012jpn day2session2

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