Applies whenever SMIL 2.0 player is available
User Agent and Assistive Technology Support Notes
This technique relates to:
The objective of this technique is to provide a way for people who are blind or otherwise have trouble seeing the video in audio-visual material to be able to access the material. With this technique a description of the video is provided via audio description that will fit into the gaps in the dialog in the audio-visual material.
<smil xmlns="//www.w3.org/2001/SMIL20/Language">
<head>
<layout>
<root-layout backgroundColor="black" height="266" width="320"/>
<region id="video" backgroundColor="black" top="26" left="0"
height="144" width="320"/>
</layout>
</head>
<body>
<par>
<video src="salesdemo.mpg" region="video" title="Sales Demo"
alt="Sales Demo"/>
<audio src="salesdemo_ad.mp3" begin="33.71s" title="audio description"
alt="Sales Demo Audio Description"/>
</par>
</body>
</smil>
The example shows a <par> segment containing an <audio> and a <video> tag. The audio stream is not started immediately.
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Find method for turning on audio description from content/player (unless it is always played by default)
Play file with audio description
Check whether audio description is played
#2 is true