How Good Is WebRTC Screen Sharing, Really? I Put 4 Codecs to the Test

I benchmarked WebRTC screen sharing across four major codecs — VP8, VP9, H.264, and AV1 — using real-world content like scrolling text and high-motion video, under different network conditions. The results? AV1 delivers the best quality, especially for dynamic content, but it's CPU-intensive. H.264 remains the most efficient all-rounder with broad hardware support. This deep dive covers frame rate, resolution, PSNR, QP, CPU usage, and more — with practical insights for devs, researchers, and anyone optimizing real-time video.