MediaRSS

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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;
?>

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