WebRTC does not care how users in a video chat learn about each other and send their connection information, it only handles how to connect those users once their information has been sent. What makes WebRTC so flexible-and, at times, confounding-is that it has no standardized server-side implementation. Nowadays, each browser has a more consistent WebRTC implementation, making browser support much better, but implementing it can still be a dance. WebRTC has been around since 2011, but implementation by the various browsers has been uneven over the years. It provides an API for handling user video, audio, and other data via peer-to-peer connections. Web Real Time Communication, or WebRTC for short, is a technology that allows real-time, peer-to-peer communication between users. ![]() We will be using the latest versions of Elixir, Erlang, Phoenix, and Phoenix LiveView in this article, which are the following at the time of writing: Finally, I’ll assume you have no WebRTC experience beyond having heard about it a few times. I’ll assume that you might have toyed around with LiveView a few times before this article, but it doesn’t take much to get up to speed. I’m going to assume that you are comfortable working with Elixir and Phoenix. You can also find the source code for this project here if you’re more of the self-guided type.Try creating a room and hopping on it with a friend or two. We’ve wrapped up the finished product and deployed it at littlechat.app.Plus, how would that even work if each of the connections is only peer-to-peer? We’ll get to that. WebRTC was designed for video calls, but group video calls? That might get complex. Tracking users seems a little tricky, but if you’ve heard of what LiveView and PubSub can do, you can probably guess that we’re still on the right track. Creating pages with central information on the fly in a web app is the bread and butter of any self-respecting web framework-and with Phoenix it’s a piece of cake. The app will allow users to establish a group video call with eachother through WebRTC peer connections.The app will keep track of which users are connected to the given room.The app will allow users to create video chat rooms with a unique slug, allowing any user to join.In this article, we’re going to build a real-time video chat application with the following requirements: And tutorials that exist generally only cover connecting two users in a fairly basic way. ![]() Mozilla’s WebRTC documentation is invaluable, but it lacked answers to some of the questions I had. ![]() When I first started researching for this project, I discovered that there isn’t much information out there about building a WebRTC-based application from start to finish. The world’s new reliance on video conferencing got me thinking: How hard could it be to build a video conferencing web application? Like most things worth doing, the answer was difficult, but fun. However, as a company, Zoom has given plenty of reasons to avoid its software. Zoom has shown itself to be a reliable partner for video conferencing. Millions of workers are now accustomed to hopping on calls with their colleagues to hash things out that they would previously have done in person. During this global pandemic, online video calls have become essential to the way we work.
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