Difference between revisions of "MediaRSS"

From A-SMIL.org
Jump to: navigation, search
(Add note for scalable method)
Line 2: Line 2:
  
 
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.
 +
 +
<EM>Note</EM>: 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">

Revision as of 11:33, 18 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.

Note: 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 = $xpath->query('/rss/channel/item/media:content',$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

Retrieved from "https://www.a-smil.org/index.php?title=MediaRSS&oldid=96"