46: Cross-Platform Video Calling with RSYS

Meta Tech Podcast

It’s the most wonderful time of the year: The time to talk about calling libraries that power most of our audio and video calls across Meta’s app. Alice, Ishan and Hani join Pascal to talk about how they replaced the different calling solutions with a library that’s extensible by the teams that choose to adopt it. But with great power comes great responsibility, so how does their team balance the desire for new features with the mandate to stay small, fast and reliable? Tune in for episode 46 to learn this and more!

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Links:

• Rsys: A smaller, faster video calling library for our apps: https://engineering.fb.com/2020/12/21/video-engineering/rsys/
• Flipper: https://fbflipper.com/
• Horizon Workrooms: https://www.meta.com/de/en/work/workrooms/

Timestamps:

• Intro 0:06
• Team Overview 1:34
• RSYS History 4:42
• Design Tradeoffs 6:10
• Testing Infrastructure 8:09
• Usage and Support Model 11:04
• Core Architectural Components 12:58
• Changing Engines Mid-Air 16:48
• Measuring Quality 19:30
• Building on top of RSYS 21:34
• Collaboration Model 24:22
• Feature Development 26:41
• Experimentation 28:43
• Metaverse Strategy 29:51
• What's Next for RSYS 33:26
• Outro 34:36
• Bloopers 35:24