Romain Beauxis

In the three years that have passed since the last Liquidsoap presentation, much change has happened! During this walk we will: * Give an update on the community growth during the pandemic and recap what we learned during our two liquidshop events that mixed technical presentations with actual user projects presentations! * Present some the recent advanced in the Liquidsoap language and how they can be be used to leverage awesome programming language ideas to create powerful, rich and safe media project scripts * Showcase the new integration with FFmpeg and how Liquidsoap provides flexible and advanced usage of the excellent FFmpeg features and APIs.

This talk should be of interest for anyone with interest in community radio, media broadcasting and anything related to audio and video handling in general, including integration with online APIs and websites and more!

We would also love to present and discuss our implementation of media APIs and the new abstractions that could be emerging in future implementations.

The talk will give a general overview of the Liquidsoap language, and put focus on recent new features: support for HLS, efficient video, etc.

The task of generating multimedia streams such as for webradios or live youtube channels is a complicated task. One needs to face low-level issues (properly encoding and distributing the streams), mid-level issues (performing normalization, signal processing, color grading, etc.) and high-level issues such as generating the stream from a wide variety of sources (local files, other streams, live interventions, user requests, etc.) and properly combining them (performing transitions, adding commercials, vary the contents during the day, etc.). In this talk, we present Liquidsoap, a dedicated high-level functional language, which allows performing all these tasks in a modular way, with strong guarantees that the stream will not fail on the long run.