# Providing audio description in SMIL 1.0

ID: SM6

Technology: smil

Type: Technique

## When to Use

Applies whenever SMIL 1.0 player is available

## Description

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 dialogue in the audio-visual material.

## Examples

### SMIL 1.0 audio description sample for QuickTime player

    <?xml version="1.0" encoding="UTF-8"?>
    <smil xmlns:qt="http://www.apple.com/quicktime/resources/smilextensions"
          xmlns="https://www.w3.org/TR/REC-smil" qt:time-slider="true">
    <head>
      <layout>
        <root-layout background-color="black" height="266" width="320"/>
        <region id="videoregion" background-color="black" top="26" left="0"
          height="144" width="320"/>
      </layout>
    </head>
    <body>
      <par>
        <video dur="0:01:20.00" region="videoregion" src="salesdemo.mov"
         alt="Sales Demo"/>
        <audio dur="0:01:20.00" src="salesdemo_ad.mp3"
         alt="Sales Demo Audio Description"/>
      </par>
    </body>
    </smil>

## Tests

### Procedure

1. Find method for turning on audio description from content/player (unless it is always played by default)
2. Play file with audio description
3. Check whether audio description is played

### Expected Results

- #3 is true

## Related Techniques

- SM2
- SM7

## Resources

- Synchronized Multimedia Integration Language (SMIL 2.0)
- Synchronized Multimedia Integration Language (SMIL 3.0)
- Accessibility Features of SMIL