Indexing method capable of supporting direct and accurate positioning of frame of program stream (PS) media file

Abstract

The invention discloses an indexing method and an indexing system capable of supporting the direct and accurate positioning of a frame of a program stream (PS) media file. A method for generating an index file of the PS media file comprises the following steps of: reading PS media data stream information, analyzing the basic file information of audio and video data streams in the PS media file inadvance, and selecting a first piece of effective video data and a first piece of effective audio data; resolving read PS media file data units, obtaining the actual file offset of encoded data from code stream identification StreamID values of the data stream information, and generating secondary audio and video indexes; sequentially performing grouping according to the occurrence time of the data units to form primary indexes at the same time of recording the secondary indexes; and replicating integral audio and video stream information. By the method and the system, the frame fracture of asource file can be effectively avoided, direct and rapid frame positioning can be realized by a secondary index method, the reading and query efficiency is greatly improved, and the storage space of a system memory is saved.

Description

technical field [0001] The invention relates to the technical field of program production, in particular to a method for supporting direct frame precise positioning and indexing of PS streaming media files. Background technique [0002] With the rapid development of multimedia video services, the storage medium of files is not limited to cassettes or optical discs, and streaming media suitable for network transmission has received more attention. However, in the context of the current national policy of triple play, there are very high requirements for the development of the Internet, TV, and telecommunications. [0003] Streaming media is a continuous audio / video data stream transmitted and played in chronological order on the data network. As a new media transmission method, it is more and more widely used in the field of video and TV production. The streaming transmission method of streaming media can divide the entire A / V and 3D multimedia files into data packets contai...

AI Technical Summary

Problems solved by technology

[0007] 1. It is easy to break the frame when reading the file, and the broadcast error;

[0008] 2. Editing streaming media files takes up a lot of memory space and takes a long time to wait;

[0009] 3. Traditional editing and positioning methods are difficult to achieve fast frame-accurate positioning;

[0010] 4. Although PS belongs to the large framework of MPEG streaming media structure, it has its own characteristics. PS has a more flexible storage method, which can be stored by frame or by a whole GOP data (multi-frame). no compatible data structures

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