Android GAM Bidding-Only Integration - Instream Video

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Ads within video content are often called ‘in-stream’ video ads. See the IAB’s format guidelines for more information and the precise definition.

Integration example:

private fun createAd() {
    // 1. Create VideoAdUnit
    adUnit = InStreamVideoAdUnit(CONFIG_ID, WIDTH, HEIGHT)

    // 2. Configure video parameters
    adUnit?.videoParameters = configureVideoParameters()

    // 3. Init player view
    playerView = PlayerView(this)
    val params = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 600)
    adWrapperView.addView(playerView, params)

    // 4. Make a bid request to Prebid Server
    adUnit?.fetchDemand { _: ResultCode?, keysMap: Map<String?, String?>? ->

        // 5. Prepare the creative URI
        val sizes = HashSet<AdSize>()
        sizes.add(AdSize(WIDTH, HEIGHT))
        val prebidURL =  Util.generateInstreamUriForGam(
            AD_UNIT_ID,
            sizes,
            keysMap
        )

        adsUri = Uri.parse(prebidURL)

        // 6. Init player
        initializePlayer()
    }
}

Starting from PrebidMobile 2.1.0 the VideoAdUnit class is deprecated. Use InStreamVideoAdUnit instead.

Configure the video ad:

private fun configureVideoParameters(): VideoParameters {
    return VideoParameters(listOf("video/x-flv", "video/mp4")).apply {
        placement = Signals.Placement.InStream

        api = listOf(
            Signals.Api.VPAID_1,
            Signals.Api.VPAID_2
        )

        maxBitrate = 1500
        minBitrate = 300
        maxDuration = 30
        minDuration = 5
        playbackMethod = listOf(Signals.PlaybackMethod.AutoPlaySoundOn)
        protocols = listOf(
            Signals.Protocols.VAST_2_0
        )
    }
}

Init and run IMA player:

private fun initializePlayer() {

    adsLoader = ImaAdsLoader.Builder(this).build()

    val playerBuilder = SimpleExoPlayer.Builder(this)
    player = playerBuilder.build()
    playerView!!.player = player
    adsLoader!!.setPlayer(player)

    val uri = Uri.parse("https://storage.googleapis.com/gvabox/media/samples/stock.mp4")

    val mediaItem = MediaItem.fromUri(uri)
    val dataSourceFactory: DataSource.Factory = DefaultDataSourceFactory(this, getString(R.string.app_name))
    val mediaSourceFactory = ProgressiveMediaSource.Factory(dataSourceFactory)
    val mediaSource: MediaSource = mediaSourceFactory.createMediaSource(mediaItem)
    val dataSpec = DataSpec(adsUri!!)
    val adsMediaSource = AdsMediaSource(
        mediaSource, dataSpec, "ad", mediaSourceFactory,
        adsLoader!!, playerView!!
    )
    player?.setMediaSource(adsMediaSource)
    player?.playWhenReady = true
    player?.prepare()
}

Step 1: Create an Ad Unit

Initialize the VideoAdUnit with the following properties:

  • configId - an ID of Stored Impression on the Prebid Server
  • width - Width of the video ad unit.
  • height - Height of the video ad unit

Step 2: Configure the video parameters

Using the VideoParameters object you can customize the bid request for video ads.

placement

Not needed for Instream video integration, which uses placement=1 and plcmt=1.

The OpenRTB 2.6 Placement Type for the auction can be expressed as an integer array or you can use an enum for easier readability.

  • 2 or InBanner : In-Banner placement exists within a web banner that leverages the banner space to deliver a video experience as opposed to another static or rich media format. The format relies on the existence of display ad inventory on the page for its delivery.
  • 3 or InArticle : In-Article placement loads and plays dynamically between paragraphs of editorial content; existing as a standalone branded message.
  • 4 or InFeed : In-Feed placement is found in content, social, or product feeds.
  • 5 or Slider, Floating or Interstitial : Open RTB supports one of three values for option 5 as either Slider, Floating or Interstitial. If an enum value is supplied in placement, bidders will receive value 5 for placement type and assume to be interstitial with the instl flag set to 1.

Notes:

  • VideoInterstitialAdUnit and rewarded video ads will default to placement= 5 if no placement value is supplied.

api

The api property is dedicated to adding values for API Frameworks to bid response according to the OpenRTB 2.6 spec. The supported values for GMA SDK integration are:

  • 1 or Signals.Api.VPAID_1 : VPAID 1.0
  • 2 or Signals.Api.VPAID_2 : VPAID 2.0
  • 3 or Signals.Api.MRAID_1 : MRAID-1 support signal
  • 5 or Signals.Api.MRAID_2 : MRAID-2 support signal
  • 6 or Signals.Api.MRAID_3 : MRAID-3 support signal
  • 7 or Signals.Api.OMID_1 : signals OMSDK support

maxBitrate

Integer representing the OpenRTB 2.6 maximum bit rate in Kbps.

minBitrate

Integer representing the OpenRTB 2.6 minimum bit rate in Kbps.

maxDuration

Integer representing the OpenRTB 2.6 maximum video ad duration in seconds.

minDuration

Integer representing the OpenRTB 2.6 minimum video ad duration in seconds.

mimes

Array of strings representing the supported OpenRTB 2.6 content MIME types (e.g., “video/x-ms-wmv”, “video/mp4”). Required property.

playbackMethod

Array of OpenRTB 2.6 playback methods. If none are specified, any method may be used. Only one method is typically used in practice. It is strongly advised to use only the first element of the array.

  • 1 or Signals.PlaybackMethod.AutoPlaySoundOn : Initiates on Page Load with Sound On
  • 2 or Signals.PlaybackMethod.AutoPlaySoundOff : Initiates on Page Load with Sound Off by Default
  • 3 or Signals.PlaybackMethod.ClickToPlay : Initiates on Click with Sound On
  • 4 or Signals.PlaybackMethod.MouseOver : Initiates on Mouse-Over with Sound On
  • 5 or Signals.PlaybackMethod.EnterSoundOn : Initiates on Entering Viewport with Sound On
  • 6 or Signals.PlaybackMethod.EnterSoundOff: Initiates on Entering Viewport with Sound Off by Default

protocols

Array or enum of OpenRTB 2.6 supported Protocols. Values can be one of:

  • 1 or Signals.Protocols.VAST_1_0 : VAST 1.0
  • 2 or Signals.Protocols.VAST_2_0 : VAST 2.0
  • 3 or Signals.Protocols.VAST_3_0 : VAST 3.0
  • 4 or Signals.Protocols.VAST_1_0_Wrapper : VAST 1.0 Wrapper
  • 5 or Signals.Protocols.VAST_2_0_Wrapper : VAST 2.0 Wrapper
  • 6 or Signals.Protocols.VAST_3_0_Wrapper : VAST 3.0 Wrapper
  • 7 or Signals.Protocols.VAST_4_0 : VAST 4.0
  • 8 or Signals.Protocols.VAST_4_0_Wrapper : VAST 4.0 Wrapper

Step 3: Prepare the Player

Create the instance of PlayerView and display it in the app UI.

Step 4: Make a bid request

The fetchDemand method makes a bid request to the Prebid Server. Use the methods which return the targeting map in the result closure.

Step 5: Generate GAM Instream URI

Using Prebid util method, generate Google IMA URI for downloading the cached creative from the winning bid.

Step 6: Cretae and init IMA player

Follow the Google Guide for integrating IMA with ExoPlayer to run a video and show instream ad from the winning bid.

Further Reading