HLS Streaming
Publish your live video with a caption track for every language, and dubbed audio tracks too, in our player or yours, delivered through a CDN to any audience size.
- Caption tracks
- All languages
- Input
- RTMP / SRT
- Replay
- 30 days
What it does
A caption track per language
Every translation is its own native caption track, picked from the player's settings menu.
Dubbed audio tracks
Add AI dubbing and each language also gets its own audio track, so viewers can listen in their language as well as read it.
Our player or yours
Embed the Line 21 player on your site, share a direct viewing page, or play the stream in your own player.
Built to scale
Streams are cached on a global CDN, so audience size isn't something you have to plan around.
Captions and audio tracks in sync
Caption and dubbed audio tracks stay in step with the picture, and you can delay or advance the captions to fine-tune it.
Replay after the event
Recorded streams stay available on demand for up to 30 days.
Learn more
Used in
Tell us about your event
We'll help you choose the right mix of captioners, AI and delivery for your audience.