Make your Media accessible

Written by Paul Vecchiato

Last published at: October 8th, 2021

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.


Automated Captions

Viostream uses speech recognition technology to automatically create captions for all videos uploaded to the system. This allows you to have a seamless and fast way to get your videos online whilst being accessible for all viewers.

These automatic captions are generated by machine learning algorithms, so the quality of the captions may vary. Automated captions might misrepresent the spoken content due to mispronunciations, accents, dialects, or background noise. You should always review automatic captions and edit any parts that haven't been properly transcribed

Viostream has a fantastic, easy to use Caption editing tool, Which allows you to preview your captions (Automated or Manually uploaded) and perform any edits as needed.





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.


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 a Caption button
  4. Select your file and click Open

Supported file extensions are srt and vtt.


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 a Transcript button
  4. Select your file and click Open

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


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.

  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