CN113225508B

CN113225508B - Section acquisition method based on recording mode

Info

Publication number: CN113225508B
Application number: CN202110474113.5A
Authority: CN
Inventors: 张志军; 任亮
Original assignee: Zhongshan Yilian Intelligent Technology Co ltd
Current assignee: Zhongshan Yilian Intelligent Technology Co ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-09-23
Anticipated expiration: 2041-04-29
Also published as: CN113225508A

Abstract

The invention relates to a Section acquisition method based on a recording mode, which comprises the following steps: initializing recording, acquiring an input source bound by the DEMUX, and creating a recording channel handle; registering callback of the channel handle if the recorded channel handle is successfully created, creating a message queue pool, and setting an input port corresponding to the DEMUX; creating a DEMUX recording channel corresponding to the handle; if the recording channel is successfully established, adding PID data to be recorded; starting a recording channel, starting a recording thread and a stream pushing thread, and starting recording; when data are recorded, in a recording thread, TS data of a current recording channel are obtained from the DEMUX; and in the push stream thread, TS data is obtained from the message queue pool, the related recording data is called back, and the Section data corresponding to a PID is obtained. And recording TS packets of the PID through the DEMUX, pushing streams through the message queue, putting TS data in a message queue pool, and acquiring Section data through a group data packet algorithm by acquiring data in the message queue pool by another thread.

Description

Section acquisition method based on recording mode

Technical Field

The invention relates to the field of communication, in particular to a Section acquisition method based on a recording mode.

Background

Nowadays, with the rapid development of technology, multimedia technology is also changing day by day, however, DVB (Digital Video Broadcasting, hereinafter referred to as DVB) and related application technologies of Digital Video Broadcasting still have important application scenarios, especially in the aspect of satellite Broadcasting, because the foreign market is open to satellite Broadcasting and network services in some remote areas are limited, mobile networks and broadband are not covered, which leads to information obstruction, and the satellite Broadcasting technology is a relatively effective solution.

In the related technology of DVB, after received data is modulated and demodulated, channel decoded, source decoded and demultiplexed, descrambling and the like are certainly required to be performed on the encrypted data, and then a TS (Transport Stream, hereinafter referred to as TS) data Stream sent by a satellite is taken to acquire related data such as related frequency point data, audio and video of a program, EPG and the like, and then playing and related display can be realized.

Generally, data such as audio and video are obtained by filtering through a Packet Identifier (PID) corresponding to a DEMUX (Demultiplexer, hereinafter referred to as a DEMUX), if some PID related data filtered by a part of platforms through the DEMUX are all collected into one thread for processing, but cannot be separated, if the data amount is too large, the processing of the related data of each PID is time-consuming, and some operations are caused, so that the data of a part of PIDs are finally taken, and especially in the acquisition of data of sections (data corresponding to data tables such as various PIDs of audio and video, hereinafter referred to as sections), it is very important that some desired effects are difficult to achieve if some data are omitted.

To solve this problem, we can use recording mode, and usually the recording is to filter the acquired data with part of PID, and process it separately on DEMUX, so as to avoid the above mentioned situation.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a Section acquiring method based on a recording mode, aiming at the above defects in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows: a Section acquisition method based on a recording mode is constructed, and the method comprises the following steps:

initializing recording, acquiring an input source bound by the DEMUX, and creating a recording channel handle;

if the record channel handle is successfully created, the callback of the channel handle is registered, a message queue pool is created, and an input port corresponding to the DEMUX is set;

creating a DEMUX recording channel corresponding to the handle;

if the recording channel is successfully established, adding PID data to be recorded;

starting a recording channel, starting a recording thread and a stream pushing thread, and starting recording;

when data are recorded, TS data of a current recording channel obtained from the DEMUX are obtained in the recording thread;

acquiring TS data from a message queue pool in a plug flow thread;

and calling back the relevant recorded data and taking the Section data corresponding to the PID.

Preferably, in the step, when data is recorded, the recording thread acquires TS data acquired from the DEMUX in the TS data of the current channel, inserts the acquired TS data into the message queue pool, and acquires the inserted TS from the message queue pool by using the stream pushing thread.

Preferably, the recording data related to the step is called back, and is taken into the Section data corresponding to the PID, and the Section data corresponding to the PID is taken through a group package and a group Section.

Preferably, when the DEMUX recording channel corresponding to the handle is created, if the creation fails, the recording is ended or the initial recording is returned.

Preferably, the method records TS packets of a single PID or multiple PIDs.

The method for acquiring the Section based on the recording mode has the following beneficial effects: and recording TS packets of a single PID or a plurality of PIDs through the DEMUX, pushing streams through the message queue, putting TS data in a message queue pool, acquiring data in the message queue pool by another thread, and acquiring Section data through a group data packet algorithm to acquire the corresponding Section data on one or a plurality of PIDs.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a schematic flow chart of a section obtaining method implemented based on a recording mode in an embodiment of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, a method for acquiring a section based on a recording mode in a preferred embodiment of the present invention includes the following steps:

registering callback of the channel handle if the recorded channel handle is successfully created, creating a message queue pool, and setting an input port corresponding to the DEMUX;

creating a DEMUX recording channel corresponding to the handle;

acquiring TS data from a message queue pool in a plug flow thread;

and calling back the related recorded data and taking the Section data corresponding to the PID.

According to the scheme, TS packets of a single PID or a plurality of PIDs are recorded through a DEMUX, then stream pushing is carried out through a message queue, TS data are placed in a message queue pool, then another thread obtains data in the message queue pool through a group data packet algorithm, and then Section data are obtained through a group data packet algorithm, and corresponding Section data on one or a plurality of PIDs are obtained.

When data are recorded, the recording thread acquires TS data acquired from a DEMUX (digital multiplexer) to a current channel, the acquired TS data are inserted into a message queue pool, and a stream pushing thread is used for acquiring the inserted TS from the message queue pool.

And calling back related recorded data, taking the recorded data into the Section data corresponding to the PID, and taking the Section data corresponding to the PID through the group package and the Section group.

And when the DEMUX recording channel corresponding to the handle is created, if the creation fails, ending or returning to the initial recording.

The scheme aims to solve the problem that Section data of some PIDs can be effectively acquired in DVB data stream acquisition, and avoids the problem that data is processed in one thread because all DEMUX filters data of the PIDs on a part of platforms, and if the data is not processed, data leakage is caused, and a recording stream pushing mode is adopted, so that the situation can be solved.

It is to be understood that the above-described respective technical features may be used in any combination without limitation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A Section acquisition method based on a recording mode is characterized by comprising the following steps:

creating a DEMUX recording channel corresponding to the handle;

inserting the TS data into a message queue pool, and acquiring the TS data from the message queue pool in a push flow thread;

and calling back the relevant recorded data, and taking the Section data corresponding to the PID through the group package and the group Section.

2. The method for obtaining a Section based on a recording mode as claimed in claim 1, wherein when a DEMUX recording channel corresponding to a handle is created, if the creation fails, the method ends or returns to initial recording.