In live streaming a continuous source — a camera, a switcher, a screen capture — feeds the encoder while viewers are already watching. The defining constraint is the absence of a finished file. The packager publishes new segments every two, four or six seconds, and the manifest grows or rewinds as a sliding window. The player must keep up: choose a starting position close to the live edge, drift toward it when the buffer grows, hold back when the network stutters.
Live splits into latency tiers. Classic HLS and DASH ship at 20–45 seconds behind live and are the default for sports and big events on smart TVs. Low-latency HLS and DASH (LL-HLS, LL-DASH) cut this to 2–6 seconds using partial segments and CMAF chunks. WebRTC and Media over QUIC reach 200 ms to 1 second and are needed for auctions, betting, casino games and any second-screen interaction tied to the broadcast. The whole industry trends downward, but cheaper means slower, and most live operators carry two or three pipelines in parallel.
Live streaming costs more per viewer than VOD for two reasons. It demands more origin and packager capacity, since the segments cannot be pre-baked and pushed once. And it puts heavy pressure on CDN cache fill — at the moment a goal is scored, every viewer in a country wants the same segment within the same second, and the edge must already hold it. Designing a live pipeline is mostly designing for that simultaneity.
The book · Volume 2 of 7
Video Streaming: A Complete Guide to Video Delivery: From Network Protocols and Transport to Ingest, HLS, and MPEG-DASH
Live streaming has no finished file, so every choice from ingest to segment length trades latency against stability. Volume 2 covers live streaming in detail: live, VOD and near-live delivery, the glass-to-glass latency budget, ingest over RTMP, SRT and RIST, and HLS, DASH and CMAF. Written by Nikolay Sapunov, CEO at Fora Soft.
Launching live streaming and need a pipeline that holds up on event day?
We will design your live streaming pipeline from ingest to player, with latency targets, redundancy and a cost estimate. 250+ video products shipped since 2005.
