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Adding captions to MP4 video files (e.g. legacy PowerPoint that is a video file)

Who is this guide for?

academics and support staff that have a narrated powerpoint slide presentation file that is only available to them as an MP4 video file, and who wish to add captions to it to make the presentation access friendly.

NOTE also works with other types of screen recorded presentations with embedded audio narration saved as a video file

Upload your video file to MS Stream Classic

The MP4 video file of the slide presentation can be manually uploaded into CU MS streams portal (web-link below) N.B. you may need to use your CU user email (e.g. 1234@coventry.ac.uk) / password to log in:

https://web.microsoftstream.com/studio/videos

Click the upload icon at the top right of any page or just drag and drop new videos to one of your groups or channels. You can upload multiple videos at the same time.

NOTE if you choose a different route to upload and are given the choice to “Upload to Stream (on SharePoint)” or to “Upload to Stream (Classic)” then choose UPLOAD TO STREAM (CLASSIC)”

N.B. you maybe interested in further information at bottom of this page about Microsoft phasing out of “stream classic” and the rolling out roadmap of “stream on sharepoint ” which includes when editing transcript features will be added to “stream on sharepoint “ .

Customise your video auto transcript settings

Video language

Select the language spoken in the video. This will enable a closed caption file for supported languages to be automatically generated.

Permissions – Allow everyone in your company to view this video

When checked, everyone in your organization can see the video. This will mean that your video available for viewing company-wide

Options – Captions

Closed captions are a text version, in the original language, of what’s spoken in the video. When a video has a caption set, viewers can click the CC button on the player while watching a video to show the captions under the video.

If you’ve selected a supported Video language in the Details pane for the video, then the Autogenerate a caption file check box will be checked. This means a caption file will be automatically generated.

Publish

Once your video has been uploaded, and you are done setting up your video, you can press the Publish now button at the bottom of the upload card. This will make the video available to you in MS Stream Classic as soon as it’s done processing (N.B. it may take a little while for auto transcription to be generated)

Editing your video captions

Log back into CU MS Stream portal (e.g. if you are returning after auto transcript file has finished processing)

Click into CU MS streams portal (web-link below) N.B. you may need to use your CU user email (e.g. 1234@coventry.ac.uk) / password to log in:

https://web.microsoftstream.com/studio/videos

Open video in the portal

in this Stream video portal, click on ‘my content’ tab, go to the meeting video recording and click on the thumbnail picture to open up in the Microsoft Stream portal:

Activate edit transcript mode

Click on pencil icon at top right of auto generated captions

Find and remove errors

You can review the auto generated captions, and click into text and edit any errors, remember to click ‘save’ after each edit of a line section

Return to view mode

After editing your video for corrections you can click on tick icon to return to view mode

Your changes in the transcript window will be saved, but for the changes to be seen in the captions displayed at the bottom of your video screen you will need to refresh the web page

Share

When you have finshed editing, select the share icon on the bottom left of your video panel …..

….. to get a copy of a link to the video (with captions), and you can then paste this in your Aula/Moodle/FutureLearn platform.

(or alternatively click the embed tab to get the embed code for the video).

Further information:

Microsoft Stream: Editing the transcript text directly in the User Interface in “Stream on SharePointroadmap GA (General Availability) : November 2022

If you have access to the original PowerPoint file in its original .ppt file format, then you will have the option to present with real-time, automatic captions or subtitles in PowerPoint, see this guide

About the author(s)

  • Simon Cheung

    Simon is an Educational Technologist at CUOL - Coventry University Online Limited. I'm an active member of the 'Inclusive Curriculum - Community of Practice' group. I am interested in accessibility & equality.

Updated on November 22, 2022

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