• Janus - Meetecho - WebRTC

    Improving the AudioBridge plugin

    July 11, 2023 - By 

    As an audio mixer and MCU, the AudioBridge plugin is quite a popular plugin among Janus users and developers. It’s definitely a foundational component in our own Virtual Event Platform, for instance, where while we use an SFU approach for video streams, audio is always mixed instead. I mentioned efforts around this plugin a few times already, like when I discussed how to use it to build social audio applications like Clubhouse or Twitter Spaces, or how it could be bridged (pun unintended!) to the SIP world. I also stressed out the importance of audio in the WebRTC world when…

  • Janus - Meetecho - WebRTC

    Playing with Lyra

    December 6, 2022 - By 

    I’m always interested in testing new codecs, especially when it comes to WebRTC. Some time ago, for instance, I talked about my experiments with AV1 and H.265, AV1-SVC or multiopus. As such, when a new codec called Lyra was announced that promised to give great audio in very low bitrates, I was definitely curious. In this blog post I’ll describe the steps I went through to get it to work in browsers and, most importantly, Janus. What’s Lyra? If you’re a fan of music as I am, the world “lyra” actually doesn’t bring a codec to mind at all, but…

  • Janus - Meetecho - WebRTC

    Social audio applications with Janus

    November 21, 2022 - By 

    Audio conversations that span to hundreds, if not thousands, of people have been quite the rage in the past few years. Podcasts are a good example of this success: there have never been so many as these days, and there’s a certain appeal to just listening to a conversation without the actual need for any visual aid or medium. It becomes even more interesting when you envision the possibility of more interactive conversations, where anyone from the audience can chime in at any time and share their thoughts. This has been at the basis of the success of platforms like…

  • Janus - Meetecho - WebRTC

    Audio redundancy in Janus via RED

    June 4, 2021 - By 

    A few months ago, I read a very interesting blog post by Philipp Hancke on how Chrome had added experimental support for audio redundancy via RED, and how it actually helped improve audio quality a lot in lossy networks. That post was followed a few weeks later by another interesting article, written by Boriz Grozev from the Jitsi team, on how RED could be used within an SFU context. I was quite intrigued by both writeups since then, but I only found time to look into this myself recently. This post tries to summarize my efforts in that regard and…