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Live Streaming WebRTC

⬢ LIVELLO 2Tecniche
Medio
Impatto sullo stipendio
3 mesi
Tempo di apprendimento
Difficile
Difficoltà
12
Carriere
In sintesi

WebRTC is a browser API for peer-to-peer video, audio, and data streaming. Unlike RTMP or HLS (which introduce 3-30 second latency), WebRTC achieves <1 second latency. Companies use it for live gaming, telehealth, remote collaboration, and interactive broadcasts. Building WebRTC infrastructure requires understanding signaling, STUN/TURN servers, codec negotiation, and bandwidth management. Mastery takes 6-8 weeks. WebRTC engineers command 20-30% salary premium because the infrastructure is complex and production deployment is non-trivial.

Cos'è Live Streaming WebRTC

WebRTC is a browser-native API for real-time peer-to-peer (P2P) communication: video, audio, and data. Unlike traditional streaming (RTMP, HLS), WebRTC achieves sub-second latency by avoiding media servers (when possible). Two browsers connect directly, exchange video/audio via an encrypted tunnel. For larger audiences, WebRTC flows through a media server (Janus, Kurento) which relays to viewers. WebRTC handles codec negotiation, bandwidth adaptation, and packet loss recovery automatically. Live streaming with traditional protocols (RTMP, HLS) introduces 3-30 second delays due to encoding, buffering, and edge distribution. For interactive applications (gaming tournaments, live auctions, telehealth, remote collaboration), that delay is unacceptable. WebRTC enables true real-time. Building WebRTC infrastructure is complex (signaling, STUN/TURN, codec management) but the payoff is immense: sub-second latency at scale. The skill is scarce and well-compensated.

🔧 STRUMENTI ED ECOSISTEMA
WebRTC APIJavaScriptSignaling server (Node.js)Janus GatewayPion (Go)STUN/TURN serversChrome DevTools WebRTCFFmpeg

💰 Stipendio per regione

RegioneLivello baseMidLivello esperto
USA$95k$155k$240k
UK£58k£95k£145k
EU€62k€105k€160k
CANADAC$100kC$165kC$255k

❓ Domande frequenti

Why use WebRTC instead of RTMP or HLS?
Latency. RTMP/HLS = 3-30 seconds (buffering, encoding delay). WebRTC = <1 second. For interactive broadcasts (gaming, auctions, sports), low latency is critical. RTMP/HLS is simpler but slower.
What's signaling and why do I need a server?
Browsers don't know each other's IP addresses. Signaling server exchanges connection info (SDP offers, ICE candidates) between peers. Signaling server = matchmaker. Once connection is established, video flows peer-to-peer (no server needed).
What are STUN and TURN servers?
STUN server helps you discover your public IP (if you're behind a NAT/firewall). TURN server relays traffic if direct peer connection fails. Most WebRTC deployments need both. STUN is cheap; TURN is expensive (bandwidth).
Can WebRTC handle 1000+ viewers?
Not via peer-to-peer (too much network traffic). Use WebRTC from broadcaster to media server, then server broadcasts to viewers via HLS. Or use SFU (Selective Forwarding Unit) for selective peer relay.
What's codec negotiation and why does it matter?
Browser A wants to use H264; Browser B wants VP9. Both must agree on codec before streaming. Negotiation happens in SDP exchange. If no common codec, stream fails. Always have fallback codec (H264 for compatibility).

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