Better video for mobile RTC with AV1 and HD

What this post added

This post details Meta's adoption and implementation of the AV1 video codec for improving real-time communication (RTC) video quality across its apps. It highlights the challenges of low-bandwidth networks and the benefits of AV1 over older codecs like H.264, focusing on its royalty-free nature and superior compression efficiency. The post also discusses technical solutions for improving video quality, including custom video scalers and region-of-interest encoding, and elaborates on AV1's specific features like palette mode, intra-block copy, and reference picture resampling (RPR) for enhanced screen content encoding and dynamic resolution adjustments. It also addresses the trade-offs of AV1, such as increased CPU and battery usage, and the strategies employed to mitigate these challenges, including seamless codec negotiation.