A method for realizing the combination of RTP multicast live broadcast and HLS unicast time shift

Abstract

The invention discloses an RTP multicast live and HLS (Http Live Streaming) unicast time shifting combined realization method relating to the internet multimedia field. The method comprises following steps that: a head end system extends an RTP header, adds media fragmentation time and media fragmentation serial number information and sends the RTP header and RTP load contents to a server in mode of an RTP data packet; the server adds an RTP multicast address and receives an RTP multicast, records the RTP load contents as HLS protocol media format according to the extension information of the RTP header and stores all RTP load contents in the time shifting duration; a terminal adds the RTP multicast address and plays live contents; the terminal switches from the live to time shifting and requests to the server for time shifting contents; after the server receives the request, the server sends corresponding time shifting contents and provides time shifting service; and the terminal switches from the time shifting to the live, adds the multicast again and plays the live contents. According to the method of the invention, the real time live is ensured and the time shifting is carried out; and the free switching between the live and the time shifting functions is realized.

Description

technical field [0001] The invention relates to the field of Internet multimedia, in particular to a method for realizing the combination of RTP multicast live broadcast and HLS unicast time shift. Background technique [0002] With the development of multimedia technology, the application of OTT (Over The Top) service has become very extensive. Compared with IPTV (Interactive Network Television) service, OTT service based on HLS (Http Live Streaming) has become more and more common. [0003] The HLS protocol, developed by Apple, slices the media content into several small fragments on the HTTP protocol, and organizes the corresponding M3U8 (segment index file) files. The live broadcast service is realized through the #EXT-X-MEDIA-SEQUENCE tag. The sequence number of the fragments given by the live broadcast source is continuously updated, and each updated fragment will be assigned an increasing sequence number, and the terminal is also played according to #EXT -X-MEDIA-SEQ...

AI Technical Summary

Problems solved by technology

[0004] Therefore, for HLS-based live broadcast, the terminal generally requests from the last 2-3 fragments, and each fragment basically has about 10 seconds of content, resulting in a long difference between the HLS live broadcast and the head-end live broadcast content. , when some real-time content is broadcast live, there is a delay in the live broadcast

[0005] However, general multicast services basically only have live broadcast services, but they cannot provide time-shift services, resulting in users being unable to freely switch between real-time live broadcast and time-shift functions, which reduces user experience.

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