Difference between revisions of "MediaRSS"
From A-SMIL.org
(Revised to return Content-Length) |
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One way to convert a media RSS feed into a SMIL feed is to use the PHP 5 XPath library. | One way to convert a media RSS feed into a SMIL feed is to use the PHP 5 XPath library. | ||
+ | |||
+ | <STRONG>This is only intended for illustration.</STRONG> While this is a convenient way to generate SMIL, this is bad for if you intend to scale. See Best Practice: [[Checking for Updates]] for a scalable method to convert live feeds into SMIL. | ||
<source lang="php"> | <source lang="php"> | ||
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$xpath->registerNamespace("media", | $xpath->registerNamespace("media", | ||
"http://search.yahoo.com/mrss/"); | "http://search.yahoo.com/mrss/"); | ||
− | $nodes = $xpath->query('/ | + | $nodes = $xpath->query('//media:content', $doc); |
− | $ttlnode= $xpath->query('/rss/channel/ttl',$doc); | + | $ttlnode= $xpath->query('/rss/channel/ttl', $doc); |
$result .= '<smil><head>' | $result .= '<smil><head>' | ||
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== Related == | == Related == | ||
+ | * [[Checking for Updates]] without restarting playback | ||
* [[Pull mode]] for SMIL | * [[Pull mode]] for SMIL | ||
* [[transport|SMIL transport]] | * [[transport|SMIL transport]] | ||
* [[SMIL_Connectivity|SMIL connectivity]] | * [[SMIL_Connectivity|SMIL connectivity]] |
Latest revision as of 04:11, 30 November 2009
A-SMIL players support configuring a "Content Source" URL which is loaded at boot time (see "Pull mode" for general usage). To make a SMIL player play from a Media RSS feed, simply set up a dynamic script (.aspx, .php, etc.) that takes a Media RSS feed and outputs SMIL, then point your SMIL player to the dynamic script.
One way to convert a media RSS feed into a SMIL feed is to use the PHP 5 XPath library.
This is only intended for illustration. While this is a convenient way to generate SMIL, this is bad for if you intend to scale. See Best Practice: Checking for Updates for a scalable method to convert live feeds into SMIL.
<?php $result = ''; $doc = new DOMDocument(); if( $doc->load('http://rss.server.com/mediarssfeed') ) // place your feed here { $xpath = new DOMXPath($doc); $xpath->registerNamespace("media", "http://search.yahoo.com/mrss/"); $nodes = $xpath->query('//media:content', $doc); $ttlnode= $xpath->query('/rss/channel/ttl', $doc); $result .= '<smil><head>' .'<layout><root-layout width="1280" height="720"/>' .'</layout><meta http-equiv="Refresh" content="' .$ttlnode->item(0)->textContent * 60 .'"/></head>' ."<body><seq repeatCount=\"indefinite\">\r\n" ; foreach( $nodes as $node ) { $result .= "\t<img src=\"" . $node->attributes->getNamedItem('url') ->textContent . "\" dur=\"" . $node->attributes->getNamedItem('duration') ->textContent . "\" />\r\n" ; } $result .= '</seq></body></smil>' ; } header( 'Content-Type: application/smil' ); header( 'Content-Length: ' . strlen( $result ) ); header( 'Cache-Control: no-cache' ); echo $result; ?>
Related
- Checking for Updates without restarting playback
- Pull mode for SMIL
- SMIL transport
- SMIL connectivity