Video accurate positioning device and method based on HLS (HTTP Live Streaming) protocol

Abstract

The invention discloses a video accurate positioning device and method based on an HLS (HTTP Live Streaming) protocol, and relates to the field of stream media playing. The video accurate positioning device is arranged on a set top box, and comprises a control module, and a playing module, a circular buffering module, an I-frame retrieval module and an HLS module which are connected with the control module, wherein the circular buffering module is connected with the I-frame retrieval module and the HLS module; the HLS module is used for interacting with an HLS server; the circular buffering module is used for circularly downloading and managing TS (Transport Stream) fragments; the I-frame retrieval module is used for finding the TS fragments downloaded in the circular buffering module and establishing an I-frame retrieval list; the playing module is used for extracting the TS fragments from the circular buffering module for playing; and the control module is used for controlling all the modules. Through adoption of the video accurate positioning device and method, accurate positioning can be realized during video playing; screen blurring is avoided; a good playing effect is achieved; and the user experience is improved.

Description

technical field [0001] The present invention relates to the field of streaming media playback, and specifically refers to a device and method for precise video positioning based on the HLS protocol. Background technique [0002] With the development of digital technology and Internet technology, the application of Internet multimedia is increasingly prosperous, and the specification of HLS (HTTP Live Streaming, Apple's dynamic bit rate adaptive technology) is more and more widely used in Internet multimedia. The feature of the HLS protocol is to segment the continuous media data with huge capacity, and divide it into a large number of TS (Transport Stream) fragments for transmission. The set-top box continuously requests to download the TS fragments to achieve smooth playback. In the HLS protocol specification, each TS segment has a #EXTINF field to identify the duration of the segment, and each segment has a sequence number corresponding to it. Therefore, HLS supports live ...

AI Technical Summary

Problems solved by technology

[0003] At present, the positioning time unit in most HLS applications is seconds, which is less than the duration of a TS segment. When the positioning time is in the middle of a TS segment, the set-top box needs to download the segment to play, and it is not accurate to the vicinity of the positioning time. However, if you do not start playing from the I frame, there will be a blurry screen, and the playback effect is not good. It gives the user the feeling that the positioning is not accurate enough, and the user experience is poor.

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