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Destinations

All the places Line 21 can deliver live captions: browser pages, on-screen overlays, text destinations such as Zoom, and RTMP and HLS video streaming.

Once captions are generated, they need to be sent to a destination for them to be displayed for the audience. Line 21 supports 5 categories of destinations:

CategoryTextVideoLanguagesDescription
BrowserAllA sharable browser page that displays captions.
OverlayAllA floating, borderless window that display captions on top of other content or applications.
Text DestinationsAllAPI-based delivery of captions as text to various target platforms, systems, apps, pages
RTMP StreamingSingleEncoding captions into a RTMP video and simulcast it to Facebook, Twitch, Twitter or YouTube.
HLS StreamingAllPublish video and captions to an HLS video player, embeddable in your own website or standalone.