RSS Feed

RSS (Really Simple Syndication) is a web feed that allows users and applications to access updates to web sites in a standardized, computer-readable format. An RSS feed is read by an RSS reader and is delivered in XML format. RSS feeds are commonly used in distributing podcasts. 
There are several different versions and RSS 2.x branch was the first to support 'enclosures', making it the leading choice for podcasting.

Workflow

A content provider shares the Podcast series (each series may have many episodes) XML to content distributor(s). Updates to series i.e. new addition of episodes, results in new XML and it will be sent separately to content distributor.

To deliver a podcast with both stereo and Dolby Atmos audio, the RSS feed should include multiple enclosures to describe the different audio formats, with one enclosure for each audio encoding of the podcast. Within each enclosure, the following attributes must be included and their values specified:

 

URL

• The location of the audio file on a server; note that use of https is recommended for podcast delivery.

length

• The size of the audio file, in bytes.

type

• A specific MIME type is used to identify whether the audio is encoded using AC-4 IMS, or DD+ JOC.
  • For AC-4 IMS content delivered in MP4 via progressive download, the MIME type used is audio/mp4; codecs = ac-4.02.02.00
  • For DD+ JOC content delivered in MP4 via progressive download, the MIME type used is audio/mp4; codecs = ec-3

 

An example of an RSS feed for a podcast delivered using three audio formats: DD+ JOC, AC-4 IMS, and stereo MP3, is shown below.

<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
    xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd">;
  <channel>
    <title>Dolby Atmos for Podcasts</title>
    <itunes:owner>
        <itunes:email>podcasts@dolby.com</itunes:email>
    </itunes:owner>
    <itunes:author>Dolby</itunes:author>
    <description>Dolby Atmos sample RSS feed</description>
    <itunes:image href="https://www.dolby.com/siteassets/dolby.com/music-movies-gaming-dolby.jpg"/>;
    <language>en-us</language>
    <link>https://professionalsupport.dolby.com/s/article/Dolby-Atmos-Podcast-distribution-through-RSS-feed?language=en_US</link>;
    <item>
      <title>Dolby Atmos music sample</title>
      <description>Enabling Dolby Atmos in your RSS feed for all playback devices.</description>
      <pubDate>Wed, 5 Mar 2025 20:00:00 GMT</pubDate>
      <enclosure
         url="https://ott.dolby.com/media/music/mp4s/UltraViolet_Untie_ddpjoc_768kbps.mp4"
         length="18507025 "
         type="audio/mp4; codecs=ec-3"
      />
      <enclosure
         url="https://ott.dolby.com/media/music/mp4s/UltraViolet_Untie_ac4_256kbps.mp4"
         length="6356492 "
         type="audio/mp4; codecs=ac-4.02.02.00"
      />
      <enclosure
         url="https://ott.dolby.com/media/podcasts/UltraViolet_Untie_mp3_128kbps.mp3"
         length="3045044"
         type="audio/mpeg"
      />
      <itunes:duration>03:10</itunes:duration>
      <guid isPermaLink="false">Dolbypodcastdemo1</guid>
    </item>
  </channel>
</rss>