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Demultiplexing method and demultiplexing device for audio and video data in multimedia files

A multimedia file, audio and video technology, applied in the direction of electrical components, image communication, selective content distribution, etc., can solve the problems of multi-threaded media player network load, slow demultiplexing speed, efficiency drop, etc., to reduce the index The effect of positioning and jump times, ensuring synchronization performance, and improving demultiplexing efficiency

Active Publication Date: 2012-12-05
SAMSUNG ELECTRONICS CHINA R&D CENT +1
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Problems solved by technology

[0009] In the process of demultiplexing multimedia files, such excessive index positioning and jump operations, especially frequently moving the read pointer of multimedia files back and forth for index positioning, will cause demultiplexing speed to slow down and efficiency to drop
Especially when demultiplexing remote multimedia files, it will cause the network load of the client where the multi-threaded media player is located, and even affect the subsequent decoding of the original streaming audio and video frame queue and subsequent normal playback

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  • Demultiplexing method and demultiplexing device for audio and video data in multimedia files
  • Demultiplexing method and demultiplexing device for audio and video data in multimedia files

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0047] It can be seen from the prior art that for multimedia files with non-interleaved buffered data frames, or interleaved buffered data frames without buffering data frames according to the decoding timestamp, the original streaming audio can be demultiplexed after many jumps The reason for the video frame queue is to arrange the data frames in the multimedia file in ascending order according to the decoding timestamp to obtain the original streaming audio and video frame queue, so that the obtained original streaming audio and video frame queue is compared with the multimedia file without multiplexing , multiple index positioning and jump operations will be performed, which will cause the demultiplexing speed to slow down and the efficiency to drop. ...

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Abstract

The invention discloses a demultiplexing method and a demultiplexing device for audio and video data in files. The demultiplexing method comprises the following steps: the longest synchronous time point is set and updated according to the set longest synchronous time; a data frame that can be output is selected according to the comparison result of the decoding time stamp of the current frame of each data frame in the multimedia file and the longest synchronous time point by referring to the sequential order of byte offset position values of the current frames of each data frame; searching and positioning are carried out in the multimedia file according to the byte offset position values of the selected data frame that can be output, and the output data frame is read out to get an original streaming audio and video array. The demultiplexing method and the demultiplexing device for audio and video data in files increase the demultiplexing efficiency of the multimedia files.

Description

technical field [0001] The invention relates to a processing technology of audio and video data in multimedia files, and is characterized in a method and device for demultiplexing audio and video data in multimedia files. Background technique [0002] With the improvement of playback technology, multi-threaded media players appeared, figure 1 A structural schematic diagram of a multi-threaded media player provided for the prior art, including a demultiplexing thread module, a video decoding thread module, a video playback thread module, an audio decoding thread module, an audio playback thread module and a shared control module, wherein the shared control module Interact with other thread modules respectively, and control the entire demultiplexing, decoding and playing process of multimedia files by other thread modules. [0003] When the demultiplexing thread module receives a multimedia file, the format of this multimedia file can be AVI, MP4, 3GP, WMV or MKV, and this mu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/434H04N21/8547
CPCH04N21/4302H04N21/4341H04N21/8547
Inventor 朱春波孙晔
Owner SAMSUNG ELECTRONICS CHINA R&D CENT
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