Reverse playing method and system of video files

A technology for video files and playback methods, applied in closed-circuit television systems, digital video signal modification, electrical components, etc., can solve the problems of increased pressure on the decoder and increased performance consumption of the decoder, so as to reduce performance consumption, save storage space, Effects of extended functions

Active Publication Date: 2017-01-04
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

Assuming that the total number of frames in a video sequence group is 25 frames, the total number of frames to be decoded by this reverse order playback method is 168 frames (25+23+21+...+3), and the performance consumption of the decoder increases a lot
Therefore, this optimization method reduces the consumption of storage capacity to a certain extent, but at the same time brings the disadvantage of increased pressure on the decoder

Method used

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  • Reverse playing method and system of video files
  • Reverse playing method and system of video files
  • Reverse playing method and system of video files

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Embodiment Construction

[0028] 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 in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0029] figure 1 It is a schematic diagram of the principle of a method for playing video files in reverse order in the prior art.

[0030] Such as figure 1 As shown, in the prior art video file reverse order playback method,

[0031] First, all video frames in a video sequence group are decoded sequentially to obtain the original stream;

[0032] Second, storing the original stream in memory;

[0033] Then, the origi...

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Abstract

The invention provides a reverse playing method and system of video files. According to the method and system, a video sequence group is selected form video files to be played in a reverse order according to a preset selection rule, each video frame in the selected video sequence group is transcoded in sequence, the video frames which accomplish transcoding are stored, the video frames are decoded as original stream in a reverse order, the original stream is played, and reverse playing of the video files is realized. According to the method and system, the video sequence group with the format of I frames is obtained through transcoding of the video sequence group and is stored in a memory, I frames are taken out from the memory in a reverse order through the decoder, reverse playing of the video files is realized, the storage space of the memory is saved, the performance consumption of the decoder is reduced, and the function of the player is expanded.

Description

technical field [0001] The invention belongs to the field of video monitoring, in particular to a method and system for playing video files in reverse order. Background technique [0002] In the field of video surveillance, playing video files in reverse order can help users find and locate interesting video content more conveniently. In the embedded digital hard disk video recorder (DVR), the video file reverse order playback (Play Reverse) is an important function in the video playback link. During reverse playback, the user can choose to pause, fast forward, slow down and other operations. The technical difficulty in realizing reverse playback of video files is that there is a fixed decoding reference relationship between video frames in the code stream. [0003] In the prior art, the method for playing video files in reverse order is as follows: first, the decoder sequentially decodes all frames in a video sequence group. A video sequence group, that is, GOP, full nam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N19/23H04N19/44H04N19/433H04N19/172
Inventor 林龑灏
Owner HANGZHOU HIKVISION DIGITAL TECH
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