Decoding synchronization method, device and equipment for live broadcast data stream

Abstract

The invention provides a live broadcast data stream decoding synchronization method, device and equipment. The method comprises the following steps: calculating a maximum timestamp according to specified parameters; Comparing the timestamp of the non-first-frame audio frame to be added into the audio cache queue with the maximum timestamp; if the timestamp of the non-first-frame audio frame is smaller than the maximum timestamp, storing the non-first-frame audio frame in the audio buffer queue, and if the timestamp of the non-first-frame audio frame is larger than the maximum timestamp, discarding the non-first-frame audio frame; And obtaining audio frames from the audio cache queue, and decoding to obtain audio data. According to the method, the time upper limit value corresponding to thetime stamp of the audio frame in the corresponding audio cache queue is dynamically adjusted, the audio frame with the time stamp exceeding the time upper limit value is discarded, the audio cache queue is reduced, and then the video data is synchronized to the audio data, so that the purpose of accurately controlling the live video delay is achieved.

Description

technical field [0001] This specification relates to the technical field of Internet live broadcasting, and in particular to a method, device and device for decoding and synchronizing live data streams. Background technique [0002] Live broadcast technology is becoming more and more popular, but it also faces more challenges. The entire live broadcast process is divided into the following key steps: the anchor client pushes the locally collected video stream to the server; the server caches and forwards the video stream; the viewer client pulls the video stream cached by the server for playback. [0003] After the viewer client downloads the video stream from the network server, it needs to decode the audio and video data in the video stream before playing, so there will inevitably be a certain network delay. Network delay refers to the time difference between the collection from the anchor client and the playback on the audience client. The network delay can be divided i...

AI Technical Summary

Problems solved by technology

The delay is mainly caused by the buffered data of the viewer client. In the prior art, the viewer client usually adjusts the size of the buffer during playback in real time based on real-time monitoring of the current network environment to ensure a lower delay time. However, due to the It is usually divided into multiple caches, and the application-controllable cache provided by the player is only the cache after demultiplexing. Therefore, it is still difficult to accurately control the size of the cache during playback, that is, it is difficult to accurately control the live video delay.

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