Generate automatic captions and a transcript for your Microsoft Stream videos
If a video's Language field is set to a supported language, Stream can automatically generate captions using Automatic Speech Recognition technology.
English, Chinese, French, German, Italian, Japanese, Portuguese, and Spanish languages are currently supported for autogenerated captions. NOTE: For USGOV we only support English and Spanish.
Only MP4 and WMV files are currently supported for automatic transcripts.
You have a choice: either autogenerate captions or upload a caption file:
You can't autogenerate captions if you have already uploaded a caption file.
You can't upload a caption file if you have selected the Autogenerate a caption file option.
Automatic captions take time to create. It typically takes 1-2x the video's duration, so for example, for a one hour video, expect to wait approximately two hours to finish processing.
Captions are used in three ways:
When watching a video, you can select to see captions at the bottom of the video.
Captions are concatenated to form a transcript, which is available in the transcript window.
Captions are indexed, so you can go directly to a specific location in a video by searching using deep search.
Enable autogenerated captions for your video
Upload a video for which you want to enable autogenerated captions. If the video is already uploaded, go to the Edit video page.
In the Details section, select a supported language.
On the Options tab, set Autogenerate captions to On.
This setting won't be available if you have selected a non-supported language.
Stream will automatically begin generating captions.
Upload a custom caption file
To upload a caption file, follow the steps in Add subtitles and captions.
You can't upload a caption file if you have set Autogenerate captions to On. To upload a caption file, set this to Off.