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1. (WO2018027101) LOW-LATENCY HTTP LIVE STREAMING

Pub. No.:    WO/2018/027101    International Application No.:    PCT/US2017/045437
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Sat Aug 05 01:59:59 CEST 2017
IPC: H04N 21/845
H04N 21/2183
H04L 29/06
H04N 21/231
H04N 21/4402
Applicants: TWITTER, INC.
Inventors: DAVIES, Geraint John
KALMAN, Mark
Title: LOW-LATENCY HTTP LIVE STREAMING
Abstract:
Implementations provide a structure for low-latency live-video streams using existing content delivery networks. An example method includes creating, at the start of a broadcast stream, a playlist for the broadcast stream that identifies at least two segment files. The content of each of the segment files is a table header. The method also includes transmitting the playlist and each of the segment files to a cache server, obtaining the video broadcast stream as a series of frames, and transmitting each frame in the series of frames to the cache server using an HTTP chunk transfer protocol, each frame being associated with, and written to, a first segment file identified in the playlist. When a frame in the broadcast stream is a break frame, the method includes transmitting an end of file marker for the first segment file and adding a video header for the break frame before it is transmitted.