Media file broadcast control method and device based on dash protocol

Abstract

The invention discloses a media file playing control method based on a DASH (Dynamic Adaptive Streaming over HTTP) protocol, comprising downloading and analyzing description files of partial media files, obtaining the media information of a certain duration of a lowest code rate, and playing slices of the lowest code rate; querying the media description files to obtain the media information of the slices, gradually increasing the code rate of the downloaded media file slices, and determining whether a buffer memory utilization rate is in a preset threshold interval range; and if the buffer memory utilization rate is not in a preset threshold interval range, adjusting the code rate of the downloaded media file slices until the buffer memory utilization rate is in a preset threshold interval range. The invention also discloses a media file playing control apparatus based on a DASH protocol. The media file playing control method and apparatus can find an optimum matching code rate in a larger bandwidth range, automatically adjust when a bandwidth changes, accelerate a starting speed under the condition of guaranteeing the fluency in watching for users, and improve the robustness of a player to network jittering.

Description

technical field [0001] The invention relates to the technical field of network television, in particular to a method and device for playing and controlling media files based on the DASH protocol. Background technique [0002] DASH (Dynamic Adaptive Streaming over HTTP, Dynamic Adaptive Streaming Media) is a protocol that uses traditional HTTP Web servers on the Internet to provide high-quality streaming media files. DASH divides media files into fragmentation groups with multiple bit rates to cover different network bandwidth requirements; when the DASH client starts to play a video file, it can select the highest supported bit rate according to the network conditions, thus ensuring viewing While improving the effect, reduce the client's stuttering and buffering. The main idea of ​​DASH technology is to divide media files into a hierarchical file organization structure, that is, divide a group of media resources containing audio and video with different bit rates into a ser...

AI Technical Summary

Problems solved by technology

[0003] There are two main problems in the current DASH software: one is the description file parsing strategy, most of which need to parse the entire description file to establish a media organization tree, which must be kept in the memory during playback, so that the slices that adapt to the bit rate can be switched at any time , when there are many slices, the generation and maintenance of this organization tree will lead to slow startup of the client and high resource usage, which will affect the user experience; the second is stream switching control, most of which select media slices according to the download speed. When the network fluctuates, the client will repeatedly request slices, which will increase the burden on the server and prolong the buffering time

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