Flash Video Accessibility

Adobe Flash provides support for adding closed captions to Flash (flv) video. The FLVPlaybackCaptioning control make it easy to attach TimedText (dfxp) format captions, and many of the built-in player skins include buttons to enable users to show and hide closed captions.


The following files are involved in creating a captioned Flash video using the FLVPlaybackCaptioning control:

Creating Captions

The free captioning tool, subtitle-horse.org, can be used to create TimedText (dfxp) format caption files. To try subtitle-horse, do the following:

  1. Browse to subtitle-horse.org
  2. Enter the URL of our sample Flash video (http://www.dhs.state.il.us/accessibility/tests/flash/video.flv).
  3. When the video loads, copy and paste the first caption from our sample Transcript (http://www.dhs.state.il.us/accessibility/tests/flash/video.txt)
  4. Play the video
  5. When the audio track reaches the end of your first caption, click the video to pause it
  6. Copy and paste the second caption from the sample Transcript
  7. Repeat steps 4 - 6 until you reach the end of the video
  8. From the Titles menu, select Write TT File (unfortunately this is a mouse-only operation)
  9. Enter the name of your caption file in the form of "video.dfxp"
  10. Follow the instructions to download and save your file locally.