Continuous Media Markup Language

Continuous Media Markup Language (CMML) is to audio or video what HTML is to text. CMML is essentially a timed text codec. It allows to structure a time-continuously sampled data file by dividing it into temporal sections (so-called clips), and provides these clips with some additional information. This information is HTML-like and is essentially a textual representation of the audio or video file. CMML enables textual searches on these otherwise binary files.

CMML is appropriate for use with all Ogg media formats, to provide subtitles and timed metadata.

CMML is deprecated; Xiph.Org Foundation recommends use Kate instead.

Example of CMML Content

<cmml>
  <stream timebase="0">
    <import src="galaxies.ogv" contenttype="video/ogg"/>
  </stream>
  <head>
    <title>Hidden Galaxies</title>
    <meta name="author" content="CSIRO"/>
  </head>
  <clip id="findingGalaxies" start="15">
    <a href="http://www.aao.gov.au/galaxies.anx#radio">
      Related video on detection of galaxies
    </a>
    <img src="galaxy.jpg"/>
    <desc>What's out there?</desc>
    <meta name="KEYWORDS" content="Radio Telescope"/>
  </clip>
</cmml>

External links

CMML Overview
The origin of the CMML document, along with further documentation and standards can be found at Annodex CMML Standard Version 2.1

Xiph.Org Foundation

Ogg Project	Vorbis Daala Theora FLAC Opus CELT Speex Tremor OggPCM Ogg Writ

Other projects	XSPF Annodex Xiph QuickTime Components cdparanoia Icecast

Related articles	Chris Montgomery CMML Ogg page Ogg Squish Use of Ogg formats in HTML5 Vorbis comment

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