# 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.

[AI dubbing](https://line-21.com/features/ai-dubbing)

### 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

- [HLS streaming docs](https://line-21.com/docs/destinations/hls-streaming)
- [Video feeds](https://line-21.com/docs/feeds/video)

Talk to us: [contact page](https://line-21.com/contact) or hello@line-21.com.