tl;dr: Opus encoding just got 20% faster on desktop Chromium by turning on AVX2 vectorization in libopus. Vectorization means one instruction doing the same arithmetic on a whole vector of values at once instead of one at a time. Codecs spend their hot loops running identical math across long buffers of samples, exactly where vectorization […]
Vibe-coding WebRTC
Well, that title is clickbait for Hacker News. The honest title would have been “using AI to tackle long-standing WebRTC issues.” Posts on webrtcHacks are rare these days, and in German we would say there are Unkenrufe that WebRTC is dead. It is not. It is the infrastructure for meetings, game streaming, and voice AI, […]
Is everyone switching to MoQ from WebRTC?
It is time for another edition of “Is everyone switching to…“. Cloudflare recently published a blog post about Media over Quic (MoQ) which made a number of statements about WebRTC that require some “clarification”. Let us start with that and look at MoQ and WebTransport after that. An odd understanding of WebRTC The blog post […]
Measuring the response latency of OpenAIs WebRTC-based Realtime API
As Chad mentioned in his post last week, we have been diving into what OpenAI is doing with WebRTC. Over the last months, we actually did a full teardown and compared OpenAI’s Realtime API to what powers chatgpt.com. What intrigued us most was how to measure response latency. One of the key metrics for any […]
Capture & Replay WebRTC video streams for debugging – video_replay 2025 update
Debugging WebRTC media issues, especially video, often requires access to the unencrypted RTP payloads. We talked about this back in 2017 already and had a great blog post on using the libWebRTC “video_replay” tool. While that post has aged remarkably well, video_replay has improved significantly, in particular since it is now possible to create the […]