【正文】 d closed caption files.POST ContentType: application/json。Audience=urn%3aWindowsAzureMediaServicesamp。odata=verboseAccept: application/json。ExpiresOn=1326498007amp。 path=/。scope=urn%3aWindowsAzureMediaServicesclient_id: AccountName,帳戶名。odata=verboseAcceptEncodingGzip,deflate對資源，服務可能不壓縮而直接返回AcceptLanguage“en”人類可讀的語言AcceptCharsetCharset type like UTF8字符集，默認UTF8XHTTPMethodHTTP Method通過隧道方式，允許通過GET方法實現防火墻等不支持的PUT/DELETE方法 ContentTypeContent type PUT/POST 中實體的類型clientrequestidString呼叫方定義的標記本次請求，如有必要，返回時也可以帶此信息媒體服務支持的響應頭部(可選)：HeaderTypeValuerequestidString服務端產生的的代表本次操作的標識clientrequestidString請求方帶來的標識DateRFC 1123 date請求處理時的時間ContentTypeVaries響應實體的類型ContentEncodingVariesGzip or deflate Identify Windows Azure Media Services EntitiesMedia Services的命名機制nb:type:scheme:SSID例子：nb:cid:UUID:0234c75e7b624d819373d869478a6643type: is the type of content idenetifier。應用實例 2012年7月19日，PPTV網絡電視和微軟在上海簽署諒解備忘錄，利用Windows Azure平臺開發(fā)PPTV ATN(Asia TV Networks)電視云平臺。例如：現場編碼內容，然后將其上傳到媒體服務以便轉碼為多種格式并通過第三方CDN交付。媒體服務的應用場景building endtoend workflows 構建端到端的工作流在云中構建全面的媒體工作流。開發(fā)者可以利用從 Azure開發(fā)者網站上下載的REST、APIs、.net、或SDKs構建自動上傳、編碼、發(fā)送視頻的工作流。和許多基于云計算的平臺 即服務（PaaS）一樣，Windows Azure Media Services旨在于使過程簡單化，于是，推出了視頻流服務。涵蓋具有 HTMLFlash 和 Silverlight 的 Windows Windows phone、Xbox、iOS 和 Android 設備。 10Ingesting Assets in Bulk with the REST API 16Process Asset with the Media Services REST API 19Manage Assets with the Media Services REST API 22Deliver Assets with the Media Services REST API 24AWS Digital Media API 27什么是AWS 27AWS提供的功能： 27Digital Media on AWS 28應用實例 31windows Azure什么是windows Azurewindows Azure是為了管理微軟建設的數據中心的服務器，網絡和存儲資源而開發(fā)的一款windows server 操作系統(tǒng)。windows Azure提供的功能網站，虛擬機，云服務，大型數據，媒體，移動服務。微軟Azure云計算流式視頻服務平臺　　企業(yè)不必通過編碼或流媒體構建架構來分配視頻內容。微軟Windows Azure官方宣傳　　Guthrie表示，構建一個媒體的分布式平臺，為不同設備和客戶端設置不同代碼和視頻流是非常復雜的任務，需要軟、硬件的連接，配置和維護。在網站上，開發(fā)者可以瀏覽幫助文檔。從上傳媒體到分發(fā)內容，媒體服務提供了一系列預生成，使用就緒，第一方和第三方組件，可以組合這些組件以滿足您的特定需求。可通過標準REST API 單獨調用媒體服務以便于外部應用程序和服務輕松集成。 PPTV ATN平臺能將世界各地的內容商將自己的內容上傳到ATN平臺上，并授權給各國/地區(qū)的服務運營商使用，同時服務運營商不需要昂貴的初期投入資本，就可以迅速整合各類視頻資源，快速實現內容定制，定價及廣告運作和收費電視的推送。內容標識符的類型scheme: is a Media Services recognized naming scheme. 命名方案SSID：schemespecific ID , is a string that corresponds with IDs in scheme, default UUID, RFC 4122.type:EntityContent Identifier TypeAssetcidAccessPolicypidLocatorlidAssetFilecidContentKeykidJobTemplatejtidTaskTemplatettidJobjidTasktidMediaProcessormpidIngestManifestmidIngestManifestAssetmaidIngestManifestFilemfidConnect To Media Services Using the Media Services REST API連接到媒體服務的REST APIWindows Azure Access Control Service: ACS , create the access token.連接Media Services 需要兩樣東西：An access token and the URI of Media Services .step1. Getting an access token獲得訪問令牌獲得令牌的HTTP請求POST ContentType: application/xformurlencodedHost: ContentLength: 120Expect: 100continueConnection: KeepAlivegrant_type=client_credentialsamp。client_secret:AccountKey,密碼。 HttpOnlyXAspNetMvcVersion: XAspNetVersion: XPoweredBy: XContentTypeOptions: nosniffDate: Fri, 13 Jan 2012 22:40:07 GMTContentLength: 580{access_token:%3a%2f%%2fws%2f2005%2f05%2fidentity%2fclaims%2fnameidentifier=client_idamp。Issuer=%3a%2f%2f %2famp。odata=verboseDataServiceVersion: MaxDataServiceVersion: xmsversion: Authorization: Bearer %3a%2f%%2fws%2f2005%2f05%2fidentity%2fclaims%2fnameidentifier=youraccountnameamp。ExpiresOn=1335602357amp。odata=verboseAccept: application/json。Audience=urn%3aWindowsAzureMediaServicesamp。odata=verbose。XAspNetVersion: XPoweredBy: Date: Fri, 27 Apr 2012 22:39:18 GMT{d:{__metadata:{id:(39。),type:,actions:{$metadata:[{title:Publish,target:(39。)/Locators}},ContentKeys:{__deferred:{uri:(39。)/Files}},ParentAssets:{__deferred:{uri:(39。odata=verboseAccept: application/json。Audience=urn%3aWindowsAzureMediaServicesamp。odata=verbose。XAspNetVersion: XPoweredBy: Date: Wed, 02 May 2012 00:59:30 GMT{d:{__metadata:{id:(39。),type:},Id:nb:pid:UUID:94763883537a41c0a0974e3f755bbeab,Created:\/Date(1335920371136)\/,LastModified:\/Date(1335920371136)\/,Name:NewUploadPolicy,DurationInMinutes:300,Permissions:2}}step2. Get The Upload URL 獲得上傳的URL為了獲取真實上傳URL，必須創(chuàng)建一個定位器。urn%3aSubscriptionId=2f84471db1ae4e75aa09010f0fc0cf5bamp。Issuer=%3a%2f%%2famp。nb%3Alid%3AUUID%3A8002bf3ca2154602b4a42aac367f709e39。),uri:(39。)/AccessPolicy}},Asset:{__deferred:{uri:(39。Delete the upload Locator to revoke write access to your Asset’s blobstorage container。odata=verboseAccept: application/json。Audience=urn%3aWindowsAzureMediaServicesamp。nb%3Acid%3AUUID%3Ac80d312d7cb144aabb232c35d10c44bd39。urn%3aSubscriptionId=2f84471db1ae4e75aa09010f0fc0cf5bamp。Issuer=%3a%2f%%2famp。%3a%2f%%2faccesscontrolservice%2f2010%2f07%2fclaims%2fidentityprovider=%3a%2f%%2famp。HMACSHA256=GxdBb%2fmEyN7iHdNxbawawHRftLhPFFqxX1JZckuv3hY%3dHost: ContentLength: 36Expect: 100continue{ Name : ExampleManifestREST }2. Create the AssetsAssets: is a container for multiple types or sets of objects in Media Services, including video, audio,images, thumbnail collections, text tracks and closed caption files. 文件夾。%3a%2f%%2faccesscontrolservice%2f2010%2f07%2fclaims%2fidentityprovider=%3a%2f%%2famp。HMACSHA256=GxdBb%2fmEyN7iHdNxbawawHRftLhPFFqxX1JZckuv3hY%3dHost: ContentLength: 55Expect: 100continue{ Name : ExampleManifestREST_Asset, Options : 1 }3. Create the IngestManifestAssetsPOST ContentType: application/json。Audience=urn%3aWindowsAzureMediaServicesamp。odata=verboseAccept: application/json。ExpiresOn=1334275521amp。odata=verboseDataServiceVersion: MaxDataServiceVersion: xmsversion: Authorization: Bearer %3a%2f%%2fws%2f2005%2f05%2fidentity%2fclaims%2fnameidentifier=070500D0F35C4A5A9249485BBF4EC70Bamp。Issuer=%3a%2f%%2famp。odata=verboseAcc