Working with closed-captioned audio

Working with closed-captioning audio

You can integrate closed-captioning in .mp3, .m4a, and .flv audio objects. The captioning text is displayed within the audio according to details specified within an associated configuration file.

When captions are integrated into an audio object, the audio controller height increases by about 90 pixels to accommodate displaying the captioning text.
Hidden audio and audio enabled without a controller will disable captioning.
Closed captions can be toggled on and off using the "CC" button on the controller.

Select from three supported formats:

Web Video Text Tracks (WebVTT) - Captioning format for HTML media players (Recommended)
SubRip Subtitle (SRT) - Popular standard used for YouTube and Facebook captioning
eXtensible Markup Language (XML) - Captioning format for Flash video

Examples of each format are provided below.

Follow these rules when creating the captioning file:

Specify the start and end times for each caption set. Time is in the format: hours:minutes:seconds:hundredths (HH:MM:SS:hhh)
Specify the text for each caption set. Text can appear on multiple lines, if desired.
Save the file as a plain text file with the desired name and change the file extension to the appropriate captioning file format (.vtt, .srt, or .xml).

Sample files are provided to help you quickly get started creating and specifying the closed captioning file.

To create and specify a closed-captioning file:

Do one of the following:
- In the Title Explorer, double-click the graphic of the audio object.
- In the Title Explorer, right-click the graphic of the audio object and select Properties.
- In the work area, double-click the audio object.
- In the work area, right-click the audio object and select Properties.
On the Properties ribbon, click Add Captions in the Playback Options group. The Add Captions window opens.
For an existing captioning file, use the Caption File pull-down list to navigate and select the captioning file. Click Edit to edit the file if necessary. To view a sample format file that you can copy and paste to a text editor, click one of the three file formats under Sample caption file formats. The WebVTT format (.vtt) is recommended.
Click OK.

Examples

WebVTT (Recommended)

00:00:08.000 --> 00:00:10.000 VTT Format: This line should appear at 8 seconds 00:00:10.500 --> 00:00:12.500 These two lines should appear at 10.5 seconds 00:00:17.000 --> 00:00:20.000 These two lines should appear at 17 seconds!

SRT

1 00:00:08.000 --> 00:00:10.000 SRT Format: This line should appear at 8 seconds 2 00:00:10.500 --> 00:00:12.500 These two lines should appear at 10.5 seconds 3 00:00:17.000 --> 00:00:20.000 These two lines should appear at 17 seconds!

XML

<?xml version="1.0" encoding="UTF-8"?>
<tt xmlns="http://www.w3.org/2006/10/ttaf1">
  <div>
    <p begin="00:00:08" end="00:00:10">
      XML Format: This line should appear at 8 seconds
    </p>
    <p begin="00:00:10.5" end="00:00:12.5">
      These two lines should
      appear at 10.5 seconds
    </p>
    <p begin="00:00:17" end="00:00:20">
      These two lines should appear
      at 17 seconds!
    </p>
  </div>
</tt>