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DASH fragmented file merging method, terminal device and storage medium

A file and index file technology, applied in electrical components, selective content distribution, image communication, etc., can solve problems such as increasing the difficulty of the electronic forensics process, and achieve the effect of ensuring authenticity and integrity

Inactive Publication Date: 2020-05-05
陕西美亚秦安信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has increased the difficulty of the electronic evidence collection process for law enforcement agencies. How to restore these video fragments into a complete video undoubtedly poses a great challenge to our mobile phone evidence collection process to ensure data integrity

Method used

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  • DASH fragmented file merging method, terminal device and storage medium

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Experimental program
Comparison scheme
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Embodiment 1

[0022] The embodiment of the present invention provides a method for merging DASH fragmented files, such as figure 1 shown, including the following steps:

[0023] S1: Parse the attachments field in the messages table corresponding to the Facebook Messenger application, and obtain the values ​​of the two parameters msg_id and mime_type.

[0024] The chat history of the mobile application is stored locally in the form of SQLite database. By analyzing the data format, it is found that the attachments field in the messages table of the application records the details of the attachments contained in the chat content such as pictures, audio, and video. The detailed information is in The standard JSON format is stored in the database.

[0025] Among them, msg_id indicates the need of the message, and mime_type indicates the type of the message.

[0026] S2: For each msg_id, judge whether its corresponding mime_type is a video type, if so, go to S3; until all msg_ids are processed,...

Embodiment 2

[0045] The present invention also provides a DASH segmented file merging terminal device, including a memory, a processor, and a computer program stored in the memory and operable on the processor, and the computer program is implemented when the processor executes the computer program. Steps in the above method embodiment of Embodiment 1 of the present invention.

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Abstract

The invention relates to a DASH fragmented file merging method, terminal equipment and a storage medium. The method comprises the steps that S1, values of msg _ id and mime _ type are analyzed; S2, for each msg _ id, judging whether the mime _ type corresponding to the msg _ id is a video type or not, If so, entering S3; and ending until all msg _ ids are processed. S3, extracting the content of the MPD index file corresponding to the msg _ id; S4, traversing a Response label of the MPD index file, and analyzing values of two parameters, i.e., rep _ id and FBQualityLabel, in each label; S5, extracting the values of all the rep _ ids corresponding to the maximum FBQuityLabel value when the FBQuityLabel value is the maximum; S6, calculating a video mark ID corresponding to each rep _ id; andS7, searching for all fragmented files conforming to the format under the video directory in the format of msg _ id + ''. Null.'' + rep _ id + ''.-'' + video marker ID + ''-n.mp4'', and combining thefragmented files. According to the method, the independent video fragments can be directly restored into a complete video file, and the authenticity and integrity of result data in the electronic evidence obtaining process are guaranteed.

Description

technical field [0001] The present invention relates to the field of sliced ​​file processing, in particular to a method for merging DASH sliced ​​files, a terminal device and a storage medium. Background technique [0002] In recent years, with the development of streaming media technology and Internet technology, mobile terminals have more and more video demands. Traditional real-time transport protocol (RTP), real-time streaming protocol (RTSP) and other streaming media protocols gradually show their Disadvantages: complex implementation and deployment, need to open a separate network port, easy to be blocked by firewalls, etc. And the traditional streaming media server based on HTTP protocol relies heavily on Flash, it is difficult to achieve cross-platform playback to meet people's needs. Based on this, the application of DASH (Dynamic Adaptive Streaming over HTTP) technology was born. It cuts the video into segments and stores them on the server side. The client compl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/845H04N21/6437
CPCH04N21/6437H04N21/8456
Inventor 段惊园李哲张磊畅斌张辉极
Owner 陕西美亚秦安信息科技有限公司