DCR Sweden Video Browser SDK

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Engineering Portal / Digital / International DCR / DCR Sweden Video Browser SDK

Overview

The Nielsen SDK is one of multiple framework SDKs that Nielsen provides to enable measuring linear (live) and on-demand TV viewing using TVs, mobile devices, etc. The Browser SDK (BSDK) is the framework for browser application developers to integrate Nielsen Measurement into their media players. It supports a variety of Nielsen Measurement Products like Digital in TV Ratings (DTVR) and Digital Content Ratings (DCR). Nielsen SDKs are also equipped to measure static content and can track key life cycle events.

Prerequisites

Before you start the integration, you will need:

Item Description Source
☑ App ID (appid) Unique ID assigned to the player/site and configured by product. Contact Nielsen

Configure SDK

There are two steps required for configuring the SDK:

  • Add Static Queue Snippet
  • Create SDK Instance

Add Static Queue Snippet

The static queue snippet allows the SDK APIs to be called while the actual SDK and configuration file are still being downloaded. As the queue can capture all API calls before the download completes, there is no wait time. Once the SDK is available, the API calls will transition from directing to the queue to the SDK seamlessly.

Add the following script tag to the website i.e. within the <head></head> tag : 

!function(e,n){
  function t(e){
    return"object"==typeof e?JSON.parse(JSON.stringify(e)):e
  }
  e[n]=e[n]||
  {
    nlsQ:function(o,r,c){
      var s=e.document,
      a=s.createElement("script");
      a.async=1,
      a.src=("http:"===e.location.protocol?"http:":"https:")+"//cdn-gl.nmrodam.com/conf/"+o+".js#name="+r+"&ns="+n;
      var i=s.getElementsByTagName("script")[0];
      return i.parentNode.insertBefore(a,i),
      e[n][r]=e[n][r]||{g:c||{},
      ggPM:function(o,c,s,a,i){e[n][r].q=e[n][r].q||[];try{var l=t([o,c,s,a,i]);e[n][r].q.push(l)}
catch(e){console&&console.log&&console.log("Error: Cannot register event in Nielsen SDK queue.")}},
      trackEvent:function(o){e[n][r].te=e[n][r].te||[];try{var c=t(o);e[n][r].te.push(c)}
catch(e){console&&console.log&&console.log("Error: Cannot register event in Nielsen SDK queue.")}}},
      e[n][r]
    }
  }
}(window,"NOLBUNDLE");


Create SDK Instance

To initialize the SDK, create an SDK instance by making the initialization call:

Initialization API Call

NOLBUNDLE.nlsQ("<appid>", "<instanceName>",{nol_sdkDebug: "debug"});


For creating an instance, pass the following values: (nol_sdkDebug is optional)

Parameter Description Values
appid Unique ID assigned to player/website "PXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX"
instanceName Name of SDK instance "any string value"
nol_sdkDebug Enables Nielsen console logging if desired. 
{nol_sdkDebug: "debug"}

When the initialization call is made, a unique static configuration file, <appid>.js, will be downloaded based on the appid and will be cached on the user’s browser.

Sample SDK Initialization Call

var nSdkInstance = NOLBUNDLE.nlsQ("PXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX", "nlsnInstance", {
    nol_sdkDebug: "debug"
});

Once the configuration is downloaded, the SDK itself will be downloaded and initialized. All SDK modules are included in one file: “nlsSDK600.bundle.min.js”.

Create Metadata Objects

Before starting any measurement of an asset(Content or Ad) with the created SDK Instance, you need to create an asset metadata object in order to identify the asset. There are two types of asset metadata:

  • content: identify a video
  • ad: identify each ad

The metadata received for each asset is used for classification and reporting.

Metadata are passed through key-values using the Nielsen reserved keys. You will need to set up content and ad objects with the required Nielsen keys as shown in the sample code below.

Create Content Metadata

Content metadata should remain constant throughout the entirety of an episode/clip including when ads play.


program and title metadata values should be passed to SDK as UTF-8 strings.

Keys Description Values Required
type type of asset "content" for main content ✓
assetid unique ID assigned to asset custom
(no Special Characters)		 ✓
program name of program custom ✓
title episode name custom ✓
length length of content in seconds Length of content in seconds (86400 seconds for live stream (24/7). For Event-Live streams planned length. For VoD video length) ✓
airdate the original date (local time with hh:mm:ss as 24h time stamp) content became available. This date does not change if the content is rebroadcasted on linear TV. YYYYMMDD HH:MI:SS (if not known set it to eg. "19700101 00:00:00") ✓
isfullepisode full episode flag
  • "y" full episode (full content for a program)
  • "n" non full episode (only one part of the entire content for a program , i.e. preview, sub-episodes)

✓

adloadtype type of Ad load
  • "1" Linear - matches TV ad load
  • "2" Dynamic - Dynamic Ad Insertion (DAI)

✓

subbrand vcid/sub-brand/Channel ID – value is automatically populated through provided AppID. In order to override the sub-brand configured to the App ID, value can be passed here (e.g. multiple sub-brands/Channels in the App) provided by Nielsen
Example Content Object
var contentMetadataObject =
{  
  type:           "content",
  assetid:        "unique_content_id",
  program:        "program name",
  title:          "episode title",
  length:         "length in seconds",
  airdate:        "20200713 10:22:00",
  isfullepisode:  "y",
  adloadtype:     "2",
};

Create Ad Metadata

The Ad Metadata (if applicable) should be passed for each individual ad.

Note: All metadata values should be passed as UTF-8 strings.

Keys Description Values Required
type type of Ad "preroll", "midroll", "postroll"
"ad" - If specific type can not be identified.		 ✓
assetid unique ID assigned to Ad custom
(no Special Characters)		 ✓
subbrand vcid/sub-brand/Channel ID – value is automatically populated through provided AppID. In order to override the sub-brand configured to the App ID, value can be passed here (e.g. multiple sub-brands/Channels in the App) provided by Nielsen
Example Ad Object
var adMetadataObject = 
{  
  type:    "preroll",
  assetid: "unique_preroll_ad_id"
};


URL Character Limit: There is a URL character limit of 2K characters due to browser limitations. Exceeding this value could impair data delivery on particular browsers.

Start the Measurement

Nielsen APIs calls are made by calling the function ggPM("event", parameter, ...) with "event" Parameter indicating the SDK API. 

nSdkInstance.ggPM("event", parameter, ...);


Event Parameter Description
"loadMetadata" content/ad metadata object Needs to be called at the beginning of each asset
"setPlayheadPosition" playhead position as integer

VOD: || current position in seconds
Live: current Unix timestamp (seconds since Jan-1-1970 UTC)
Note: "setPlayheadPosition" has to be called every second

Pass playhead position every second during playback

"stop" playhead position in seconds Call when content interrupted/paused or ads complete playing and pass playhead position
"end" playhead position in seconds Call when the current video asset completes playback and pass the playhead position.

Example: At the end of the content stream, if the user switches to another piece of content when the browser is refreshed or closed.


Start the measurement by calling the "event" names "loadMetadata" followed by "setPlayheadPosition". 


// START OF STREAM  (main content)
nSdkInstance.ggPM("loadMetadata", contentMetadataObject); 
// CONTENT plays
// pass playhead every second
nSdkInstance.ggPM("setPlayheadPosition", playheadPosition);

Stop/Resume the Measurement for video Playback Interruptions

Handle Video Playback Interruption

The setPlayheadPostion event is used for handling playback interruption. To indicate that the video player is not playing (i.e. paused, buffering), stop passing the playhead position to the SDK. Once the Playback resumes, begin sending the playhead position again with the correct playhead value.

List of video Playback Interruptions

The following possible video Playback Interruptions must be handled:

  • Player PAUSED
  • Player BUFFERING
  • Browser/Tab close
  • Leaving the page to another destination
  • Pressing the stop button
  • Network Loss

Example for handling Playback Interruption: Browser/Tab close/Page Reload

window.addEventListener("beforeunload", function(event) 
{
  // Only inside an Ad indicate <stop> for the ad
  nSdkInstance.ggPM("stop", playheadPosition);
  
  // Indicate <end> for the content
  nSdkInstance.ggPM("end", playheadPosition);
});

Note: additional code may be needed in order to support specific browser versions (e.g. older versions of Internet Explorer).

SDK Call Sequence

The sample event lifecycles can be used as a reference for identifying the order for calling events.

Content Playback Call Sequence

// START OF STREAM
nSdkInstance.ggPM('loadMetadata', contentMetadataObject); 
 
// CONTENT PLAYS
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);

// END OF STREAM
nSdkInstance.ggPM('end', playheadPosition);

Ad Playback Call Sequence

// START OF STREAM
nSdkInstance.ggPM('loadMetadata', contentMetadataObject); 
 
// PREROLL
nSdkInstance.ggPM('loadMetadata', prerollMetadataObject);
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
nSdkInstance.ggPM('stop', playheadPosition);
 
// CONTENT
nSdkInstance.ggPM('loadMetadata', contentMetadataObject);
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
nSdkInstance.ggPM('stop', playheadPosition);

// MIDROLL
nSdkInstance.ggPM('loadMetadata', midrollMetadataObject);
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
nSdkInstance.ggPM('stop', playheadPosition);
 
// CONTENT RESUMES
nSdkInstance.ggPM('loadMetadata', contentMetadataObject);
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);

// END OF STREAM
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
nSdkInstance.ggPM('end', playheadPosition);
 
// POSTROLL
nSdkInstance.ggPM('loadmetadata', postrollMetadataObject);
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
//  
//   pass playhead every second
//   
nSdkInstance.ggPM('setPlayheadPosition', playheadPosition);
nSdkInstance.ggPM('stop', playheadPosition);
  • 'setPlayheadPosition' is used for calculating duration and must be passed every second. The final playhead position must be sent for the current asset being played before calling 'stop', 'end', or 'loadmetadata'.
  • For Ad Pods, events must be called for each individual Ad. Each Ad playhead position should begin at ‘0’ when ad starts.
  • When content has resumed following an ad break, the playhead position update must continue where previous content segment left off. The playhead position should be passed as a rounded number with no decimals.

Review SDK Integration Architecture Diagram

For Content Playback

SDK Integration Architecture Diagram - Content

For Ad Playback

SDK Integration Architecture Diagram - Ad

Privacy and Opt-Out

There are two primary methods for implementing user Opt-out preferences:

  1. User Opt Out - Provide a link to the Nielsen Privacy Policy page when a User can make their selection
  2. Initialization Opt Out - Global OptOut Parameter

User Opt Out

The site must provide a means for the user to opt-out of, or opt back into, Nielsen Measurement. A user can opt-out if they would prefer not to participate in any Nielsen online measurement research. To implement the User Opt-Out option, include the following two items in your privacy policy.

  • A notice that the player (or page in relation to static measurement) includes proprietary measurement software that allows users to contribute to market research (such as Nielsen TV Ratings).
  • A link to the Nielsen Digital Measurement Privacy Policy at https://www.nielsen.com/digitalprivacy

On the Nielsen Digital Measurement Privacy Policy page, users can click Choices to read more detailed information about the measurement software, learn about their options with regard to Nielsen measurement, and, if they do not want to participate in Nielsen online measurement, click a link to receive an opt-out cookie.

  • Once users have opted out via this link, their browser cookies will contain the value TOTAL_OPTOUT. This will prevent a redirect to our data provider from occurring
  • Users can opt back in via this link. When a user selects that link, their opt-out cookie will be deleted and they will be able to be measured moving forward.


The following paragraph is a template for a Privacy Statement.

The properties may feature Nielsen proprietary measurement software, which will allow users to contribute to market research, such as Nielsen TV Ratings. To learn more about the information that Nielsen software may collect and your choices with regard to it, please see the Nielsen Digital Measurement Privacy Policy at https://www.nielsen.com/digitalprivacy

User Opt Back In

Once users have opted-out, they can choose to opt back into Nielsen Measurement at anytime by selecting the opt back in link on the Nielsen Digital Privacy Policy page. When a user selects the link, their opt-out cookie will be deleted and they will be able to be measured.

Initialization Opt Out

The BSDK600 now supports the ability to optout on initialization of the SDK by allowing an optout global parameter to be passed. This optout will be maintained through the session of the SDK instance. Specifications and limitations are specified below.

Type Supported Values Notes Optout
optout True, Yes, or 1 Case is insensitive and can be string or bool

Example: nlsQ("XXXXXXXX-BH45-JKY6-BKH7-67GJKY68GJK7", "myInstance", { optout: true});

Ping parameter will set uoo=true.
optout False, No, or 0 Case is insensitive and can be string or bool

Example: nlsQ("XXXXXXXX-BH45-JKY6-BKH7-67GJKY68GJK7", "myInstance", { optout: false});

Ping parameter will set uoo to blank.

Example of using OptOut

var nSdkInstance = NOLBUNDLE.nlsQ("XXXXXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXX", "nlsnInstance", {
  nol_sdkDebug: "debug",
  optout: "true"
});

Opt Out Overview

Browser Cookie uoo value in session ping Final Optout Status
Default Value no uoo value or uoo=0 Not Opted Out
Default Value uoo=1 Opted Out
TOTAL_OPTOUT uoo=0 Opted Out
TOTAL_OPTOUT uoo=1 Opted Out

Test your player by yourself

Guide

1. Run your player in the Browser, start a video
2. Open the Developer Network View in order to monitor network traffic
3. Filter the network traffic by "nmr" and confirm the presence of GN pings

Example of GN ping

https://secure-dmk.nmrodam.com/cgi-bin/gn?prd=dcr&ci=us-500207&ch=us-500207_c77_P&asn=defChnAsset&fp_id=&fp_cr_tm=&fp_acc_tm=&fp_emm_tm=&ve_id=&devmodel=&manuf=&sysname=&sysversion=&sessionId=zlmmxkq867zt4bpnumlyz6dpn9hyp1610980356&tl=Episode%201&prv=1&c6=vc%2Cc77&ca=us-500207_c77_VID5556674-123456&cg=TAMSample%20DK&c13=asid%2CP10DF14BA-937E-436D-99DF-ED39A0422387&c32=segA%2CNA&c33=segB%2CNA&c34=segC%2CNA&c15=apn%2C&plugv=&playerv=&sup=1&segment2=&segment1=&forward=0&ad=0&cr=4_00_99_V1_00000&c9=devid%2C&enc=true&c1=nuid%2C999&at=view&rt=video&c16=sdkv%2Cbj.6.0.0&c27=cln%2C0&crs=&lat=&lon=&c29=plid%2C16109803568088038&c30=bldv%2C6.0.0.563&st=dcr&c7=osgrp%2C&c8=devgrp%2C&c10=plt%2C&c40=adbid%2C&c14=osver%2CNA&c26=dmap%2C1&dd=&hrd=&wkd=&c35=adrsid%2C&c36=cref1%2C&c37=cref2%2C&c11=agg%2C1&c12=apv%2C&c51=adl%2C0&c52=noad%2C0&sd=170&devtypid=&pc=NA&c53=fef%2Cy&c54=oad%2C20200713%2010%3A22%3A00&c55=cref3%2C&c57=adldf%2C2&ai=VID5556674-123456&c3=st%2Cc&c64=starttm%2C1610980392&adid=VID5556674-123456&c58=isLive%2Cfalse&c59=sesid%2Cgezrb92q4i9b9jg7acxgn783gjw0a1610980365&c61=createtm%2C1610980392&c63=pipMode%2C&c68=bndlid%2C&nodeTM=&logTM=&c73=phtype%2C&c74=dvcnm%2C&c76=adbsnid%2C&c77=adsuprt%2C2&uoo=&evdata=&c71=ottflg%2C0&c72=otttyp%2Cnone&c44=progen%2C&davty=0&si=http%3A%2F%2Fnielsenonlinesupport.com%2Fdk%2Findex.htm&c66=mediaurl%2Cassets%252FRTVOD_C3%252Fprog_index.m3u8&c62=sendTime%2C1610980392&rnd=714644

Provide your app for certification

Once ready please send your application to Nielsen local staff for certification.

Going Live

After the integration has been certified (but not prior to that), disable debug logging by deleting {nol_sdkDebug: "DEBUG"} from Initialization API Call.

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