VAST xml with multiple mediafiles defaults to the last entry
Summary
The issue is that the JWPlayer, when given multiple formats for video files, is always defaulting to the last one. So even if the XML specifies an MP4 and FLV file, the player always defaults to the last media file and fails in case it's WEBM.
Repro
XML Includes WebM as last media file:
http://ad.doubleclick.net/pfadx/N7473.289800.DQNA.COM2/B8065885.108023453;sz=0x0;ord=${CACHEBUSTER};dcmt=text/xml
...
...
<MediaFiles>
<MediaFile delivery="progressive" width="424" height="240" type="video/x-flv" bitrate="280" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/5/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496742/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/85DF51F68EB5DDCDF21A52F71B5CFEF311D1F095.650653A48926EBC4088F60B552801215E5CFAFFC/key/ck2/file/file.flv
]]>
</MediaFile>
<MediaFile delivery="progressive" width="636" height="360" type="video/x-flv" bitrate="610" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/34/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496753/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/2B9C2E6A5C90FD3AD14638ACF14ED795EAB67767.AB2B767F2ACAA2A3750A13EFC2D6981E003F1427/key/ck2/file/file.flv
]]>
</MediaFile>
<MediaFile delivery="progressive" width="176" height="144" type="video/3gpp" bitrate="50" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/17/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496742/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/73691F89212C91559B452D80AEA05C6DC37CA7BC.674B9E9A474B2753983F8B00B057DE711DAE4EE/key/ck2/file/file.3gpp
]]>
</MediaFile>
<MediaFile delivery="progressive" width="320" height="182" type="video/3gpp" bitrate="176" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/36/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496744/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/8D102C3718A335524FB936CF230B043EF1C3386.3422E9E2FCE5AD384A6312B202FDCA8B8272FCAF/key/ck2/file/file.3gpp
]]>
</MediaFile>
<MediaFile delivery="progressive" width="636" height="360" type="video/mp4" bitrate="604" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/18/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496750/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/90F789F00B825571E3EF352AA8D178E2140D14C3.97A01F9BB0776FE83E20D7DFCBDC0980F6E65F8E/key/ck2/file/file.mp4
]]>
</MediaFile>
<MediaFile delivery="progressive" width="636" height="360" type="video/webm" bitrate="751" scalable="false" maintainAspectRatio="false">
<![CDATA[
http://gcdn.2mdn.net/videoplayback/id/d10b65f0048159b5/itag/43/source/doubleclick_dmm/ratebypass/yes/ip/0.0.0.0/ipbits/0/expire/3541496759/sparams/id,itag,source,ratebypass,ip,ipbits,expire/signature/4E1DE321A5D5B3EAE7430C8D6A558A3B314B8ED3.B62935D939998686582954AE137FF3B7D91A6182/key/ck2/file/file.webm
]]>
</MediaFile>
</MediaFiles>
...
However, this XML without WebM as last mediafile works fine:
http://ad.doubleclick.net/pfadx/N7473.289800.DQNA.COM2/B8065885.107978432;sz=0x0;ord=${CACHEBUSTER};dcmt=text/xml
We often receive XML VAST Tags with FL4, MP4 and WEBM formats included.
This causes problems when WEBM is the last type in the order. This is an
old bug and we found a workaround by changing the order of the video
files, so that WEBM isn't the last type in the XML.
