Video Ad Serving Template

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VAST (Video Ad Serving Template) is a specification released by the Interactive Advertising Bureau (IAB) that sets a standard for communication requirements between ad servers and video players.

It is a data structure declared using XML.

VAST has 6 versions: 1.0 (deprecated), 1.1 (deprecated),[1] 2.0, 2.0.1(The schema version as the official VAST 2.0 schema)[2], 3.0[3] and 4.0[4]

Request[edit]

In order to play a video ad in a video player, the video player sends a request to a VAST ad server.

It is a simple HTTP based URL that typically appears as follows: http://www.example.com/?LR_PUBLISHER_ID=1331&LR_CAMPAIGN_ID=229&LR_SCHEMA=vast2-vpaid

Response[edit]

The ad server responds with a VAST data structure that declares these parameters:

  • The ad media that should be played
  • How the ad media should be played
  • What should be tracked as the media is played

For example, the above request returns the following response (trimmed):

 1  <?xml version="1.0" encoding="utf-8"?>
 2  <VAST version="2.0">
 3  <Ad id="229">
 4     	<InLine>
 5     		<AdSystem version="4.9.0-10">LiveRail</AdSystem>
 6     		<AdTitle><![CDATA[LiveRail creative 1]]></AdTitle>
 7     		<Description><![CDATA[]]></Description>
 8     		<Impression id="LR"><![CDATA [http://t4.liverail.com/?metric=impression&cofl=0&pos=0&coid=135&pid=1331&nid=1331&oid=229&olid=2291331&cid=331&tpcid=&vid=&amid=&cc=default&pp=&vv=&tt=&sg=&tsg=&pmu=0&pau=0&psz=0&ctx=&tctx=&coty=0&adt=0&scen=&url=http%3A%2F%2Fwww.longtailvideo.com%2Fsupport%2Fopen-video-ads%2F23120%2Fwhat-is-vast%2F&cb=1259.192.118.68.5.0.690&ver=1&w=&wy=&x=121&y=121&xy=0b79&z2=0]></Impression>
 9  			.......
10  		    <Creatives>
11  			    <Creative sequence="1" id="331">
12             		<Linear>
13             			<Duration>00:00:09</Duration>
14  	                    <TrackingEvents>
15         	                <Tracking event="firstQuartile"><![CDATA [http://t4.liverail.com/?metric=view25&pos=0&coid=135&pid=1331&nid=1331&oid=229&olid=2291331&cid=331&tpcid=&vid=&amid=&cc=default&pp=&vv=&tt=&sg=&tsg=&pmu=0&pau=0&psz=0&ctx=&tctx=&coty=0&adt=0&scen=&url=http%3A%2F%2Fwww.longtailvideo.com%2Fsupport%2Fopen-video-ads%2F23120%2Fwhat-is-vast%2F&cb=1259.192.118.68.5.0.690&ver=1&w=&wy=&x=&y=&xy=]></Tracking>
16                             <Tracking event="midpoint"><![CDATA [http://t4.liverail.com/?metric=view50&pos=0&coid=135&pid=1331&nid=1331&oid=229&olid=2291331&cid=331&tpcid=&vid=&amid=&cc=default&pp=&vv=&tt=&sg=&tsg=&pmu=0&pau=0&psz=0&ctx=&tctx=&coty=0&adt=0&scen=&url=http%3A%2F%2Fwww.longtailvideo.com%2Fsupport%2Fopen-video-ads%2F23120%2Fwhat-is-vast%2F&cb=1259.192.118.68.5.0.690&ver=1&w=&wy=&x=&y=&xy=]></Tracking>
17                            	.......
18                         </TrackingEvents>         
19                         <VideoClicks>
20             		     	<ClickThrough><![CDATA [http://t4.liverail.com/?metric=clickthru&pos=0&coid=135&pid=1331&nid=1331&oid=229&olid=2291331&cid=331&tpcid=&vid=&amid=&cc=default&pp=&vv=&tt=&sg=&tsg=&pmu=0&pau=0&psz=0&ctx=&tctx=&coty=0&adt=0&scen=&url=http%3A%2F%2Fwww.longtailvideo.com%2Fsupport%2Fopen-video-ads%2F23120%2Fwhat-is-vast%2F&cb=1259.192.118.68.5.0.690&ver=1&w=&wy=&x=&y=&xy=&redirect=http%3A%2F%2Fliverail.com%2F]></ClickThrough>
21             			</VideoClicks>
22                         <MediaFiles>
23         				    <MediaFile delivery="progressive" bitrate="256" width="480" height="352" type="video/x-flv"><![CDATA [http://cdn.liverail.com/adasset4/1331/229/331/lo.flv]></MediaFile>
24         				    ......
25     				    </MediaFiles>
26     				    ......
27     				</Linear>
28     			</Creative>
29     		</Creatives>
30     	</InLine>
31     </Ad>
32  </VAST>

References[edit]

  1. ^ Grenager, Teg (2012-07-19). "Video Ad Serving Template (VAST) Version 3.0" (PDF). Interactive Advertising Bureau: 8. Retrieved 2015-05-14. 
  2. ^ "Digital Video Ad Serving Template (VAST) 2.0". IAB - Empowering the Marketing and Media Industries to Thrive in the Digital Economy. Retrieved 2017-06-01. 
  3. ^ http://www.iab.net/vast
  4. ^ http://www.iab.com/guidelines/digital-video-ad-serving-template-vast-4-0/

See also[edit]