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WCAG 2 and Multi-media - transcript, caption, translate WCAG 2 and Multi-media - transcript, caption, translate Presentation Transcript

  • Transcribe Caption Translate WCAG 2.0 and Multimedia Roger Hudson Web Usability 12 May 2010
  • Guideline 1.2 Time-based media: Provide alternatives for time-based media Pre-recorded audio and/or video Live audio and/or video
  • S.C. 1.2.1 Audio-only and Video-only (Level A) Pre-recorded audio-only Pre-recorded video-only (no sound) Pre-recorded audio or video
    • Text alternative (transcript) with all important dialogue and description of background sounds
    • Text description of video information/story
    • Audio description of information in the video
    (NB: Pre-recorded is defined as “information that is not live”) View slide
    • What to include:
    • Speakers and what they say
    • Important sound effects
    • Preparing a transcript is not difficult
    • And, even easier when working off a script
    Transcripts View slide
  • Pre-recorded multi-media S.C. 1.2.2 Captions (Prerecorded): Captions are provided for all prerecorded audio content in synchronized media, except when the media is a media alternative for text and clearly labeled. (Level A) Open (always visible) captions All dialogue and important sounds are embedded as text in the video track. No special user agent support required. Closed captions using any readily available media format that supports closed captioning All dialogue and important sounds are embedded as text in a way that allows the text to be visible only when requested. Closed captions using Synchronized Multimedia Integration Language (SMIL)
  • First transcripts Now captions OMG!
  • Closed Captioning Process
    • Create a transcript
    • Divide the transcript into caption-sized segments
    • Timestamp the caption-sized segments
    • Save to an output file that is appropriate for your media type
  • Captioning with dotSub http://dotsub.com/
  • Upload video, select Transcribe
  • E.G: “ Refreshable Braille and the Web ” http://www.dingoaccess.com/accessibility/refreshable-braille-and-the-web/ Enter captions, edit captions, mark as complete
  • What is SMIL? S ynchronized M ultimedia I ntegration L anguage SMIL is an official W3C mark-up language SMIL can be used with multi-media presentations to integrate audio and/or video with images, text, and alternative audio equivalents. More information: “Accessibility Features of SMIL” (1999) http://www.w3.org/TR/SMIL-access/
  • Text file (Captions with timestamps) Video file (various possible formats) SMIL file Video player
    • A SMIL file contains:
    • The layout of the presentation
    • The timeline of the presentation
    • The source of the multimedia elements
    Captioning with SMIL
  • Works with many players SMIL captioned can be viewed in many formats, including Many captioning tools available including MAGpie ( http://ncam.wgbh.org/invent_build/web_multimedia/tools-guidelines/magpie ) Make life easy
  • QuickTime SMIL file From MAGpie
  • QuickTime TXT file From MAGpie
  • Preparing Captions with MAGpie
  • Prepare appropriate transcript TXT file
    • Keep the lines of text short
    • Single return (line-break) for new line
    • Double return (line-breaks) for new caption
  • Choose video file in selected format
  • Nominate track type, name and language
  • Video and caption interface Suggestion: Don’t use the Speaker field. Include speaker’s names with captions
  • Automatically insert captions NB: You can enter captions manually if you wish
  • Play video and enter start times (press F9) Don’t worry if you make a few mistakes, correct them later.
  • Format captions (if you want)
  • Enter end times and correct mistakes (as required)
  • Review/play with captions (press F6) & revise
  • Export in format appropriate for video file
  • S.C. 1.2.5Audio Description (Prerecorded): Audio description is provided for all prerecorded video content in synchronized media. (Level AA) S.C. 1.2.3 Audio Description or Media Alternative (Prerecorded): An alternative for time-based media or audio description of the prerecorded video content is provided for synchronized media, except when the media is a media alternative for text. (Level A) 1.2.6 Sign Language (Prerecorded): Sign language interpretation is provided for all prerecorded audio content in synchronized media. (Level AAA) Various techniques for providing a separate user-selectable audio track for descriptions, closed and open captions and SMIL Audio descriptions and signing Signing
  • Captioning with YouTube
  • Upload video and go to MyVideos
  • Select the video and Captions
  • Add a Caption Track But what about Machine Transcription? Let’s have a quick look – Errors in forms video
  • Choose text file & select “Transcript file”
  • Must click into this to make upload button available – don’t have to enter any info Upload file, and wait.
  • Video: http://www.youtube.com/dingoaccess#p/a/u/0/G8HnmItcNkE YouTube captions and translations
  • More Information: UIAccess has a list of transcript service providers: http://www.uiaccess.com/transcripts/transcript_services.html Is the requirement to provide a transcript and/or caption for pre-recorded content too onerous? Many companies now prepare transcripts and/or captions for audio and video content. Indication of costs and time:
    • Audio transcript costs: $1.00 - $10.00 per minute.
    • Video caption costs: From transcript approx $50 per hour
    • Turnaround time: 1- 10 days
    What do you think?
  • What about live audio and/or video? S.C. 1.2.4 Captions (Live): Captions are provided for all live audio content in synchronized media. (Level AA) Indication of costs: CaptionsDirect in South Australia provides remote live captioning for $165 per hour. http://www.captionsdirect.com.au/ Captions provide the audio content and should also identify who is speaking and describe significant sound effects.
  • Thank you and any questions?
    • Email: [email_address]
    • Mobile: 0405 320 014
    • Web: www.usability.com.au
    • Blog: www.dingoaccess.com
    • Twitter: http://twitter.com/rogerhudson