Method and system for realizing direct playing of dynamic code rate by streaming media

Abstract

The invention provides a method and a system for realizing direct playing of a dynamic code rate by a streaming media. The method comprises the following the steps that a source server only provides a high-code-rate media stream with a first code rate; a content distribution network server acquires the high-code-rate media stream from the source server and converts the high-code-rate media stream to obtain multiplex low-code-rate media streams; the multiplex low-code-rate media streams respectively have various code rates lower than the first code rate; and the content distribution network server dynamically updates the path of one of the multiplex low-code-rate media streams or the high-code-rate media stream to a playing list according to the data transmission condition between the content distribution network server and a player and transmits the playing list to the player for playing. According to the method and the system disclosed by the invention, the workload and the operation complexity of the source server can be reduced and the bandwidth required by the source server is facilitated to be reduced.

Description

technical field [0001] The invention relates to streaming media live broadcasting technology, in particular to a method and system for realizing a dynamic code rate of streaming media live broadcasting in a content distribution network. Background technique [0002] The current dynamic code stream technology for HTTP live streaming is implemented on the client side. The client first obtains the code rate information of all the programs, and then selects the URL corresponding to the specific code rate media stream to play according to its own network conditions. [0003] Usually, the server lists all bit rate information of the program in the m3u8 (m3u is a playlist file, and m3u8 is UTF-8 encoded file) list. An m3u8 example file describing the dynamic bit rate is as follows: [0004] #EXTM3U [0005] #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=1280000 [0006] http: / / example.com / low.m3u8 [0007] #EXT-X-STREAM-INF:PROGRAM-ID=1,BANDWIDTH=2560000 [0008] http: / / example.com / ...

AI Technical Summary

Problems solved by technology

[0015] 1> The source server needs to maintain channels of all bit rates, which makes the source server have a heavy workload and high operational complexity;

[0016] 2> The current streaming media live broadcast basically depends on the content distribution network (CDN, Content Delivery Network) to complete the transmission. In the above-mentioned mode in the existing technology, all channels with high bit rate and low bit rate must be returned to the source, resulting in running cost increase;

[0017] 3> For the adaptive adjustment of different bit rates, the player needs to obtain the channel names of all bit rates in advance. It is difficult to dynamically add or delete channels of other bit rates. In addition, if the stream of a certain bit rate is damaged, the player will still will request the stream

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