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Video subtitling (captioning)

According to new legislation, all videos published from 23 September 2020 should be subtitled for increased accessibility. “In KTH Play there is a subtitling function called ”captions”.

More about the legal requirement and how to make caption video-recorded material accessible can be found on the Film and Sound  page.

Video caption tool activated and opened

KTH Play, KTH's system for the production and publication of video-recorded material for educational purposes, has now been supplemented and integrated with a caption tool (the Reach module).

The captioning service is activated and opened for all employees at KTH as of 2020-10-12.

The price for the captioning service is 7 euros per hour of film material and KTH is currently looking at how the cost should be aggregated and distributed. The proposal is that the cost does not burden individual staff but is distributed equally between all schools.

Captioning video in KTH Play

You order your video to be machine-generated captioned by clicking on the "submit" in the Reach module after you have uploaded your video in KTH Play. It then takes a while for the module to caption the video, depending on how long it is. You need to go through the video to manually correct words where the machine-generated captioning did not work. When the video is captioned, the viewer in the player can set various options for, for example, font size, font, and background. The captioning is done in either Swedish or English.

Tips for captioning

  • Good sound quality and clear speech at the time of recording increase the probability of a more accurate machine-generated caption.
  • Edit the video before ordering machine-generated captions, for example in Kaltura Edit or Camtasia - this way you save time in the text correction if there are still parts of the video that you do not want to include.
  • If you need to video edit, for example, divide an already captioned video into several parts, do this in KTH Play so that the captions remain and are visible in the right place in the parts.
  • Order a machine-generated caption of a short video to learn how the captioning tool works.
  • Remember to disable the captions in the video so that it does not appear in the player unless you have reviewed and corrected the machine-generated captions.
  • Make time for manual editing of machine-generated captions, possible adjustment of the text formatting such as rows and positioning as well as proofreading/listening.
  • Do not publish the video until captioning and manual correction are done.

Guide: how to captioning your video

Information on how to captioning your video in the Reach module can be found here: How to caption your video in KTH Play .

Lunch ’n’ Learn-webbinar

Video: Video captioning in KTH Play with Reach

What is good to think about before captioning video and how do you do it technically? In this Lunch 'n' Learn webinar you will learn how to caption your videos in KTH Play via the Reach module.

Presenters: Hannes Hagstrand (video editor/video producer, Digital learning, KTH) and Mats Åhrman (KTH IT).

Go to the video about Video captioning (KTH Play) .
(Lunch 'n’ Learn Webinar 2020-12-02)

The Act on Accessibility to Digital Public Services (DOS)

According to the EU directive (2016/2102) on accessibility regarding public authorities' websites and mobile applications, all EU countries must have laws aimed at increasing digital accessibility for all users, including people with disabilities.

In Sweden, the directive is implemented by the law on accessibility to digital public services that came into force on 1 January 2019. KTH as an authority therefore needs to adapt its website so that content is published in an accessible format for everyone.

Accessible film and audio

For film and audio content, the accessible format means that users who cannot access audio or video recordings are can assimilate the content using an alternative representation. For example, it could be a script (a text) that has been edited to match the actual content of the recording. For recorded material, all audio that is important for the content of a video must be captioned for increased accessibility.

The requirements for recorded video apply to materials published from 23 September, 2020.

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Last changed: Sep 06, 2021