開始使用 IMA DAI SDK

IMA SDK 可讓您輕鬆將多媒體廣告整合至您的網站和應用程式。IMA SDK 可以 向任何 與 VAST 相容的廣告伺服器,並管理您應用程式中的廣告播放方式。使用 IMA DAI SDK 時,應用程式可提供 廣告和內容影片的串流請求 (VOD 或直播內容)。接著,SDK 會傳回 讓您省去切換廣告和內容影片的麻煩 應用程式內的一切

選取所需的 DAI 解決方案

本指南將說明如何使用 適用於 Roku 的 IMA DAI SDK

IMA DAI 廣告連播放送總覽

使用 IMA DAI 導入廣告連播放送時,需包含兩個主要的 SDK 元件: 相關數據

此外,你必須要求資訊清單操控 伺服器擷取串流 資訊清單。確切的程序可能因影片技術而異 合作夥伴 (VTP) 連線至 VTP。

必要條件

播放影片

範例影片 玩家 Chrome 可讓您直接播放內建內容影片將範例播放器部署至 Roku 裝置,確認開發環境設定正確無誤。

將您的影片播放器轉換成 IMA DAI 串流播放器

請按照下列步驟實作串流播放器。

建立 Sdk.xml

將名為 Sdk.xmlMainScene.xml 一起新增至專案,以及 新增以下樣板:

Sdk.xml

<?xml version = "1.0" encoding = "utf-8" ?>

  <component name = "imasdk" extends = "Task">
  <interface>
  </interface>
  <script type = "text/brightscript">
  <![CDATA[
    ' Your code goes here.
  ]]>
  </script>
  </component>

您需要編輯這些檔案 (MainScene.xmlSdk.xml) 中的 本指南。

載入 IMA DAI SDK 架構

如要載入架構,請將下列指令新增至 manifestSdk.xml

資訊清單

bs_libs_required=googleima3

Sdk.xml

<?xml version = "1.0" encoding = "utf-8" ?>

  <component name = "imasdk" extends = "Task">
  <interface>
  </interface>
  <script type = "text/brightscript">
  <![CDATA[
  Library "IMA3.brs"
  ]]>
  </script>
  </component>

初始化 IMA DAI SDK

載入 IMA 動態廣告插播串流的第一步,就是載入 初始化 IMA DAI SDK。下列程式碼會初始化 IMA DAI SDK 指令碼。

Sdk.xml

<?xml version="1.0" encoding="utf-8" ?>

  <component name="IMASDKTask" extends="Task">
  <interface>
    <field id="IMASDKInitialized" type="Boolean" />
    <field id="errors" type="stringarray" />
  </interface>
  <script type = "text/brightscript">
  <![CDATA[
    Library "IMA3.brs"
    sub init()
      m.top.functionName = "runThread"
    end sub

    sub runThread()
      if not m.top.IMASDKInitialized
        initializeIMASDK()
      end if
    end sub

    sub initializeIMASDK()
        if m.sdk = invalid
          m.sdk = New_IMASDK()
        end if
        m.top.IMASDKInitialized = true
    end sub
  ]]>
  </script>
  </component>

現在請在 MainScene.xml 中啟動這項工作,並移除呼叫來載入內容 串流。

MainScene.xml

<?xml version="1.0" encoding="utf-8" ?>

<component extends="Scene" initialFocus="myVideo" name="MainScene">
  <script type="text/brightscript">
  <![CDATA[
  function init()
    m.video = m.top.findNode("myVideo")
    m.video.notificationinterval = 1
    runIMASDKTask()
  end function

  function runIMASDKTask()
    m.IMASDKTask = createObject("roSGNode", "IMASDKTask")
    m.IMASDKTask.observeField("IMASDKInitialized", "handleIMASDKInitialized")
    m.IMASDKTask.observeField("errors", "handleIMASDKErrors")

    m.IMASDKTask.control = "RUN"
  end function

  sub handleIMASDKInitialized()

    ' Follow your manifest manipulator (VTP) documentation to register a user
    ' streaming session if needed.

  end sub

  sub handleIMASDKErrors(message as object)
    print "------ IMA DAI SDK failed  ------"
    if message <> invalid and message.getData() <> invalid
      print "IMA DAI SDK Error ";message.getData()
    end if
  end sub
  ]]>
  </script>
  <children>
    <Video height="720" id="myVideo" visible="false" width="1280"/>
  </children>
</component>

建立 IMA 串流播放器

接下來,您必須使用現有的 roVideoScreen 建立 IMA 串流 廣告。

直播活動廣告連播放送

這個串流播放器會在直播影片中實作三種回呼方法: streamInitializedadBreakStartedadBreakEnded

串流載入時,也停用「誘騙播放」功能。這樣一來,使用者就無法 在片頭廣告開始播放前 (在廣告插播前),略過片頭廣告 就會觸發這個事件

Sdk.xml

<?xml version="1.0" encoding="utf-8" ?>

  <component name="IMASDKTask" extends="Task">
  <interface>
    <field id="IMASDKInitialized" type="Boolean" />
    <field id="errors" type="stringarray" />
    <field id="urlData" type="assocarray" />
    <field id="adPlaying" type="Boolean" />
    <field id="videoNode" type="Node" />
  </interface>

  <script type="text/brightscript">
  ...
  sub runThread()
    if not m.top.IMASDKInitialized
      initializeIMASDK()
    end if

    setupPlayerCallbacks()
  end sub
  ...
  sub initializeIMASDK()
    if m.ima = invalid
      ima = New_IMASDK()
      ima.initSdk()
      m.ima = ima
    end if
    m.top.IMASDKInitialized = true
  end sub

  sub setupPlayerCallbacks()
    m.player = m.ima.createPlayer()
    m.player.top = m.top

    m.player.streamInitialized = function(urlData)
      m.top.videoNode.enableTrickPlay = false
      m.top.urlData = urlData
    end function

    m.player.adBreakStarted = function(adBreakInfo)
      print "------ Ad break started ------"
      m.top.adPlaying = true
      m.top.videoNode.enableTrickPlay = false
    end function

    m.player.adBreakEnded = function(adBreakInfo)
      print "------ Ad break ended ------"
      m.top.adPlaying = false
      m.top.videoNode.enableTrickPlay = true
    end function

  end sub
  </script>
...
</component>

VOD 串流廣告連播放送

針對 VOD 串流,此串流播放器會實作四種回呼方法: streamInitializedloadUrladBreakStartedadBreakEnded。在 streamInitialized 回呼,請務必呼叫 StreamManager.loadThirdPartyStream()。否則將導致 SDK 未觸發 loadUrl 函式。

在這個步驟中,您也需要向影片技術合作夥伴請求串流網址 (VTP),並且在 loadAdPodStream() 取得串流 ID。接著,呼叫 StreamManager.loadThirdPartyStream(),其中包含廣告連播資訊清單以及任何 字幕。

串流載入時,也停用「誘騙播放」功能。這樣一來,使用者就無法 在片頭廣告開始播放前 (在廣告插播前),略過片頭廣告 就會觸發這個事件

Sdk.xml

<?xml version="1.0" encoding="utf-8" ?>

  <component name="IMASDKTask" extends="Task">
  <interface>
    <field id="IMASDKInitialized" type="Boolean" />
    <field id="errors" type="stringarray" />
    <field id="adStitchedStreamInfo" type="assocarray" />
    <field id="adPlaying" type="Boolean" />
    <field id="videoNode" type="Node" />
    <field id="streamParameters" type="assocarray" />
  </interface>

  <script type="text/brightscript">
  ...
  sub runThread()
    if not m.top.IMASDKInitialized
      initializeIMASDK()
    end if

    setupPlayerCallbacks()
  end sub
  ...
  sub initializeIMASDK()
    if m.ima = invalid
      ima = New_IMASDK()
      ima.initSdk()
      m.ima = ima
    end if
    m.top.IMASDKInitialized = true
  end sub

  sub loadThirdPartyStream(adStitchedManifest as string, subtitleConfig as dynamic)
    m.streamManager.loadThirdPartyStream(adStitchedManifest, subtitleConfig)
  end sub

  sub setupPlayerCallbacks()
    m.player = m.ima.createPlayer()
    m.player.top = m.top

    m.player.streamInitialized = function(urlData)
      adStitchedManifest = m.top.streamParameters.VTPManifest.replace("[[STREAMID]]", urlData.streamId)
      loadThirdPartyStream(adStitchedManifest, m.top.streamParameters.subtitleConfig)
    end function

    m.player.loadUrl = function(streamInfo)
      m.top.adStitchedStreamInfo = streamInfo
    end function

    m.player.adBreakStarted = function(adBreakInfo)
      print "------ Ad break started ------"
      m.top.adPlaying = true
      m.top.videoNode.enableTrickPlay = false
    end function

    m.player.adBreakEnded = function(adBreakInfo)
      print "------ Ad break ended ------"
      m.top.adPlaying = false
      m.top.videoNode.enableTrickPlay = true
    end function

  end sub
  </script>
...
</component>

建立及執行直播或 VOD 廣告連播放送串流要求

建立串流播放器後,您可以建立並執行串流要求。 這個範例含有儲存在 m.testPodServingStream

直播活動廣告連播放送

m.testPodServingStream 物件中,儲存 Google 廣告的參數 管理員需要找出有問題的串流,例如聯播網代碼和 自訂素材資源金鑰。一併儲存用於存取資訊清單的資訊清單網址 惡意程式碼。在這種情況下,資訊清單網址必須包含 Google 傳回串流要求後加入的串流 ID。

如要支援 AdUI (例如 adChoices 圖示),您也必須傳送 在要求中附上含有您的內容影片的節點參照。

MainScene.xml

function init()
  m.video = m.top.findNode("myVideo")
  m.video.notificationinterval = 1
  m.testPodServingStream = {
    title: "Test live stream for DAI Pod Serving",
    assetKey: "test-live-stream",
    networkCode: "your-network-code",
    manifest: "https://.../master.m3u8?stream_id=[[STREAMID]]",
    apiKey: ""
  }
  runIMASDKTask()
end function

function runIMASDKTask()
  m.IMASDKTask = createObject("roSGNode", "IMASDKTask")

  m.IMASDKTask.streamParameters = m.testPodservingStream
  m.IMASDKTask.videoNode = m.video

  m.IMASDKTask.observeField("IMASDKInitialized", "handleIMASDKInitialized")
  m.IMASDKTask.observeField("errors", "handleIMASDKErrors")

  m.IMASDKTask.control = "RUN"
end function

Sdk.xml

<interface>
  <field id="IMASDKInitialized" type="Boolean" />
  <field id="errors" type="stringarray" />
  <field id="urlData" type="assocarray" />
  <field id="adPlaying" type="Boolean" />
  <field id="videoNode" type="Node" />
  <field id="streamParameters" type="assocarray" />
</interface>

...

sub runThread()
  if not m.top.IMASDKInitialized
    initializeIMASDK()
  end if

  setupPlayerCallbacks()
  loadAdPodStream()
end sub

sub loadAdPodStream()
  request = m.ima.CreatePodLiveStreamRequest(m.top.streamParameters.assetKey, m.top.streamParameters.networkCode, m.top.streamParameters.apiKey)

  ' Set the player object so that the request can trigger the player's
  ' callbacks at stream initialization or playback events.
  request.player = m.player

  ' Set the video node for the IMA DAI SDK to create ad UI as its child nodes.
  request.adUiNode = m.top.video

  requestResult = m.ima.requestStream(request)
  if requestResult <> invalid
    print "Error requesting stream ";requestResult
    return
  end if

  m.streamManager = invalid
  while m.streamManager = invalid
    sleep(50)
    m.streamManager = m.ima.getStreamManager()
  end while

  if m.streamManager = invalid
    errors = CreateObject("roArray", 1, True)
    invalidStreamManagerError = "Invalid stream manager"
    print invalidStreamManagerError
    errors.push(invalidStreamManagerError)
    m.top.errors = errors
    return
  end if

  if m.streamManager["type"] <> invalid and m.streamManager["type"] = "error"
    errors = CreateObject("roArray", 1, True)
    print "Stream request returns an error. " ; m.streamManager["info"]
    errors.push(m.streamManager["info"])
    m.top.errors = errors
    return
  end if

  setupStreamManager()
  m.streamManager.start()
end sub

VOD 串流廣告連播放送

m.testPodServingStream 物件中,您會儲存用於 以便 Google Ad Manager 提供串流 ID。其他儲存 資訊清單網址,用來存取資訊清單中的使用者專屬資訊清單 惡意程式碼。

如要支援 AdUI (例如 adChoices 圖示),您也必須傳遞指向 節點,其中包含您的內容影片。

MainScene.xml

sub init()
  m.video = m.top.findNode("myVideo")
  m.video.notificationinterval = 1
  m.testPodServingStream = {
    title: "Pod Serving VOD Stream",
    networkCode: "your-network-code",
    VTPManifest: "https://.../manifest.m3u8?gam-stream-id=[[STREAMID]]",
    subtitleConfig: []
  }
  runIMASDKTask()
end sub

sub runIMASDKTask()
  m.IMASDKTask = createObject("roSGNode", "IMASDKTask")

  m.IMASDKTask.streamParameters = m.testPodservingStream
  m.IMASDKTask.videoNode = m.video

  m.IMASDKTask.observeField("IMASDKInitialized", "handleIMASDKInitialized")
  m.IMASDKTask.observeField("errors", "handleIMASDKErrors")

  m.IMASDKTask.control = "RUN"
end sub

Sdk.xml

sub runThread()
  if not m.top.IMASDKInitialized
    initializeIMASDK()
  end if

  setupPlayerCallbacks()
  loadAdPodStream()
end sub

sub loadAdPodStream()
  request = m.ima.CreatePodVodStreamRequest(m.top.streamParameters.networkCode)

  ' Set the player object so that the request can trigger the player
  ' callbacks at stream initialization or playback events.
  request.player = m.player

  ' Set the video node for the IMA DAI SDK to create ad UI as its child nodes.
  request.adUiNode = m.top.video

  requestResult = m.ima.requestStream(request)
  if requestResult <> invalid
    print "Error requesting stream ";requestResult
    return
  end if

  m.streamManager = invalid
  while m.streamManager = invalid
    sleep(50)
    m.streamManager = m.ima.getStreamManager()
  end while

  if m.streamManager = invalid
    errors = CreateObject("roArray", 1, True)
    invalidStreamManagerError = "Invalid stream manager"
    print invalidStreamManagerError
    errors.push(invalidStreamManagerError)
    m.top.errors = errors
    return
  end if

  if m.streamManager["type"] <> invalid and m.streamManager["type"] = "error"
    errors = CreateObject("roArray", 1, True)
    print "Stream request returns an error. " ; m.streamManager["info"]
    errors.push(m.streamManager["info"])
    m.top.errors = errors
    return
  end if

  setupStreamManager()
  m.streamManager.start()
end sub

新增事件監聽器並開始串流

直播活動廣告連播放送

請求直播後,你只剩幾個步驟要做:新增 事件接聽程式,以便追蹤廣告進度並將 Roku 訊息轉送至 SDK。 請務必將所有訊息轉寄給 SDK,以確保廣告正確無誤 播放。否則將造成系統錯誤檢舉廣告觀看次數。

在這個步驟中,您還會新增函式來取代 [[STREAMID]] 巨集 並將完成的資訊清單要求網址傳送給影片播放器。 這項實作會在這個步驟中取得串流 ID,但視您的 VTP 而定 則可能需要先進行這個步驟才能進行

MainScene.xml

function runIMASDKTask()
  m.IMASDKTask = createObject("roSGNode", "IMASDKTask")

  m.IMASDKTask.streamParameters = m.testPodservingStream
  m.IMASDKTask.videoNode = m.video

  m.IMASDKTask.observeField("IMASDKInitialized", "handleIMASDKInitialized")
  m.IMASDKTask.observeField("errors", "handleIMASDKErrors")
  m.sdkTask.observeField("adStitchedStreamInfo", "loadAdStitchedStream")

  m.sdkTask.control = "RUN"
end function

sub loadAdStitchedStream(message as object)
  print "Ad pod stream information ";message
  adPodStreamInfo = message.getData()
  manifest = m.testPodservingStream.manifest.Replace("[[STREAMID]]", adPodStreamInfo.streamId)
  playStream(manifest, adPodStreamInfo.format)
end sub

sub playStream(url as string, format as string)
  vidContent = createObject("RoSGNode", "ContentNode")
  vidContent.url = url
  vidContent.title = m.testPodservingStream.title
  vidContent.streamformat = format
  m.video.content = vidContent
  m.video.setFocus(true)
  m.video.visible = true
  m.video.control = "play"
  m.video.EnableCookies()
end sub

Sdk.xml

sub runThread()
  if not m.top.IMASDKInitialized
    initializeIMASDK()
  end if

  setupPlayerCallbacks()
  loadAdPodStream()
  if m.streamManager <> invalid
    runLoop()
  end if
end sub

sub runLoop()
  m.top.videoNode.timedMetaDataSelectionKeys = ["*"]

  ' IMPORTANT: Failure to listen to the position and timedmetadata fields
  ' could result in ad impressions not being reported.
  m.port = CreateObject("roMessagePort")
  m.top.videoNode.observeField("position", m.port)
  m.top.videoNode.observeField("timedMetaData", m.port)
  m.top.videoNode.observeField("timedMetaData2", m.port)
  m.top.videoNode.observeField("state", m.port)

  while True
    msg = wait(1000, m.port)
    if m.top.videoNode = invalid
      print "exiting"
      exit while
    end if

    m.streamManager.onMessage(msg)
    currentTime = m.top.videoNode.position
    if currentTime > 3 And not m.top.adPlaying
      m.top.videoNode.enableTrickPlay = true
    end if
  end while
end sub

sub setupStreamManager()
  m.streamManager.addEventListener(m.sdk.AdEvent.ERROR, errorCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.START, startCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.FIRST_QUARTILE, firstQuartileCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.MIDPOINT, midpointCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.THIRD_QUARTILE, thirdQuartileCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.COMPLETE, completeCallback)
end sub

sub startCallback(ad as object)
  print "Callback from SDK -- Start called - "
end sub

sub firstQuartileCallback(ad as object)
  print "Callback from SDK -- First quartile called - "
end sub

sub midpointCallback(ad as object)
  print "Callback from SDK -- Midpoint called - "
end sub

sub thirdQuartileCallback(ad as object)
  print "Callback from SDK -- Third quartile called - "
end sub

sub completeCallback(ad as object)
  print "Callback from SDK -- Complete called - "
end sub

function errorCallback(error as object)
  print "Callback from SDK -- Error called - " ; error
  m.errorState = True
end function

VOD 串流廣告連播放送

請求直播後,你只剩幾個步驟要做:新增 事件接聽程式,以便追蹤廣告進度並將 Roku 訊息轉送至 SDK。這項服務 請務必將所有訊息轉寄給 SDK,以確保廣告正確 播放。否則系統將以錯誤的方式回報廣告觀看次數。

MainScene.xml

sub runIMASDKTask()
  m.IMASDKTask = createObject("roSGNode", "IMASDKTask")

  m.IMASDKTask.streamParameters = m.testPodservingStream
  m.IMASDKTask.videoNode = m.video

  m.IMASDKTask.observeField("IMASDKInitialized", "handleIMASDKInitialized")
  m.IMASDKTask.observeField("errors", "handleIMASDKErrors")
  m.sdkTask.observeField("adStitchedStreamInfo", "loadAdStitchedStream")

  m.sdkTask.control = "RUN"
end sub

sub loadAdStitchedStream(message as object)
  print "Ad pod stream information ";message
  adPodStreamInfo = message.getData()
end sub

sub playStream(url as string, format as string, subtitleConfig as object)
  vidContent = createObject("RoSGNode", "ContentNode")
  vidContent.title = m.testPodservingStream.title
  vidContent.url = url
  vidContent.subtitleConfig = subtitleConfig
  vidContent.streamformat = format
  m.video.content = vidContent
  m.video.setFocus(true)
  m.video.visible = true
  m.video.control = "play"
  m.video.EnableCookies()
end sub

Sdk.xml

sub runThread()
  if not m.top.IMASDKInitialized
    initializeIMASDK()
  end if

  setupPlayerCallbacks()
  loadAdPodStream()
  if m.streamManager <> invalid
    runLoop()
  end if
end sub

sub runLoop()
  m.top.videoNode.timedMetaDataSelectionKeys = ["*"]

  ' IMPORTANT: Failure to listen to the position and timedmetadata fields
  ' could result in ad impressions not being reported.
  m.port = CreateObject("roMessagePort")
  m.top.videoNode.observeField("position", m.port)
  m.top.videoNode.observeField("timedMetaData", m.port)
  m.top.videoNode.observeField("timedMetaData2", m.port)
  m.top.videoNode.observeField("state", m.port)

  while True
    msg = wait(1000, m.port)
    if m.top.videoNode = invalid
      exit while
    end if

    m.streamManager.onMessage(msg)
    currentTime = m.top.videoNode.position
    if currentTime > 3 and not m.top.adPlaying
      m.top.videoNode.enableTrickPlay = true
    end if
  end while
end sub

sub setupStreamManager()
  m.streamManager.addEventListener(m.sdk.AdEvent.ERROR, errorCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.START, startCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.FIRST_QUARTILE, firstQuartileCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.MIDPOINT, midpointCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.THIRD_QUARTILE, thirdQuartileCallback)
  m.streamManager.addEventListener(m.sdk.AdEvent.COMPLETE, completeCallback)
end sub

sub startCallback(ad as object)
  print "Callback from SDK -- Start called - "
end sub

sub firstQuartileCallback(ad as object)
  print "Callback from SDK -- First quartile called - "
end sub

sub midpointCallback(ad as object)
  print "Callback from SDK -- Midpoint called - "
end sub

sub thirdQuartileCallback(ad as object)
  print "Callback from SDK -- Third quartile called - "
end sub

sub completeCallback(ad as object)
  print "Callback from SDK -- Complete called - "
end sub

sub errorCallback(error as object)
  print "Callback from SDK -- Error called - " ; error
  m.errorState = True
end sub