Creating an accessible media asset

Written by Stuart Auld

Last published at: June 26th, 2020

Viostream includes a number of features designed to improve accessibility. You can choose to use only some features, or enable the full suite and achieve WCAG 2.0 compliance.

This guide will step you through the different accessibility features available for media assets in Viostream.

Closed Captions

Closed captions are a text file most commonly containing dialogue that syncs with a media asset. To use closed captions in Viostream, you can either create and upload your own files, or order captions via Viostream.

Creating a closed caption file

If you wish to create or edit your own closed captions file, you can do so using a text editor such as Notepad++ or VS Code. Note: word processing software such as MS Word is not suitable for creating caption files.

Viostream supports captions formatted in accordance with the WebVTT standard. A WebVTT file in general consists of a sequence of text segments associated with a time-interval, called a cue.

A sample WebVTT file is shown below. Each cue consists of a start time, a finish time and the text to display

WEBVTT

00:00.000 --> 00:03.000
This is the first caption

00:03.000 --> 00:08.000
Captions can be
multi-line

00:08.000 --> 00:15.000
However, the player will automatically insert line-breaks where required, therefore manual line breaks are not recommended

Be sure to save your files with a .vtt extension so that you can upload them to Viostream.

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Uploading a closed caption file

  1. From the media library, locate the media asset to which you wish to add transcripts and click on its title.
  2. Click the Accessibility tab
  3. Click the Upload Captions button
  4. Select your file and click Open

Supported file extensions are srt and vtt.


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Ordering closed captions via Viostream

  1. From the media library, locate the media asset to which you wish to add transcripts and click on its title.
  2. Click the Accessibility tab
  3. Ensure that you have enough minutes in your account - you can compare your available minutes in the Convert Video to Text section with the duration of the asset in the side bar. If you need more minutes, please contact your Account Manager or click the + Add Minutes button.
  4. Click the Order a Caption and Transcript button
  5. Click Continue

Transcripts and captions will automatically be loaded to the asset within 2 business days. If you require a faster turnaround, please contact your Account Manager before requesting the captions.


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In order to ensure your closed captions appear to your viewers, you must ensure that you have enabled closed captions in your Player (see Creating an accessible Player‍).

Transcripts

A transcript is a downloadable text document that can be attached to a media asset. You can attach as many transcripts as you like to a single asset, and they will all be listed in the download section where enabled

Uploading a transcript

  1. From the media library, locate the media asset to which you wish to add transcripts and click on its title.
  2. Click the Accessibility tab
  3. Click the Upload Transcript button
  4. Select your file and click Open

Supported file extensions are html, htm,pdf,txt,rtf,doc and docx.

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Ordering transcripts via Viostream

  1. From the media library, locate the media asset to which you wish to add transcripts and click on its title.
  2. Click the Accessibility tab
  3. Ensure that you have enough minutes in your account - you can compare your available minutes in the Convert Video to Text section with the duration of the asset in the side bar. If you need more minutes, please contact your Account Manager or click the + Add Minutes button.
  4. Click the Order a Caption and Transcript button
  5. Click Continue

Transcripts and captions will automatically be loaded to the asset within 2 business days. If you require a faster turnaround, please contact your Account Manager before requesting the captions.


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In order to ensure your transcripts are downloadable by your viewers, you must ensure that you have enabled transcript downloads in your Player (see Creating an accessible Player‍).

Audio Descriptions

An audio description is an additional audio track designed for visually impaired viewers, which describes the video content. In order to use audio descriptions, you must upload a file that contains an additional audio description track.

Renaming the audio description track

  1. From the media library, locate the media asset you wish to update and click on its title.
  2. Click the Accessibility tab
  3. Under the Audio Tracks section, type in the new name(s) for your audio tracks.
  4. Click Update


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