Low-latency broadcasting to a large audience¶

LL-HLS is suitable for low-latency broadcasting to a large audience. Typical scenarios:

• Broadcasting a sports match: thousands of viewers, they are not ready to hear "goal!" later than their neighbors.
• Online conferences, large webinars: many viewers interacting through chat, and latency can hinder communication with the audience.

For such tasks, we offer LL-HLS: it allows you to build an efficient CDN and keep acceptable latency.

Stream preparation¶

Before playing, configure the publication in Flussonic. Most often, publication is done:

• From programs like OBS. Here is an article on how to do this.
• From a browser, with a webcam or screen presentation. On the Publishing via WebRTC page, we explained how to set this up.

Server preparation¶

LL-HLS requires HTTP/2, which means you need to configure HTTPS on the server and provide the player with an https:// link. Some players ignore this requirement, but we recommend not skipping this:

• Safari will definitely not work without https. It will switch to regular HLS mode, and low latency will be lost.
• HTTP/2 allows multiplexing requests in one connection. This provides a better user experience: the video will buffer less frequently.

Here is an article that will help you quickly set up https.

Playing with low latency via LL-HLS¶

The LL-HLS stream can be played:

• In any third-party player with LL-HLS support. The LL-HLS playback link can be copied from the Output tab in the stream profile.
• In our embed.html player, if you add the parameters realtime=true&proto=ll-hls to the URL. Open this link in a browser on a phone or computer:

https://FLUSSONIC-IP/STREAMNAME/embed.html?realtime=true&proto=ll-hls