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Video stream reverse playing method and device

A video streaming and multi-channel video technology, applied in the direction of digital video signal modification, electrical components, image communication, etc., can solve the problem of huge decoder performance consumption, achieve the effect of reducing the occupation of encoding and decoding resources and saving memory

Inactive Publication Date: 2020-10-09
HANGZHOU HIKVISION DIGITAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this method requires multiple decoders, it consumes a lot of decoder performance

Method used

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  • Video stream reverse playing method and device
  • Video stream reverse playing method and device
  • Video stream reverse playing method and device

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Embodiment Construction

[0059] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] Through the above analysis of the existing video stream reverse playback solution, it is found that the current single video stream reverse playback method has certain defects. According to the above analysis, the inventor has provided the video stream reversing solution described in the present invention:

[0061] figure 1 It is a flow chart of a video stream reverse playback method provided by an embodiment of the present invention, and its specific steps are as follows:

[0062] Step 101: Decode the video stream in reverse order.

[0063] Step 102: Perform intra-frame encoding on each decoded image frame.

[0064] Step 103: Decode the coded frame obtained by coding in reverse order, and output the decoded image.

[0065] The beneficial effect of above-mentioned embodiment is as follows:

[0066] 1. By decoding the video...

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Abstract

The embodiment of the invention provides a video stream reverse playing method and device. The method comprises the following steps: performing reverse decoding on a video stream; carrying out intra-frame coding on each decoded frame of image; and performing reverse decoding on the coded frame obtained by coding, and outputting a decoded image. According to the embodiment of the invention, the memory and codec resources occupied in the video stream reverse playing processing process are reduced as much as possible.

Description

technical field [0001] The invention relates to the technical field of playing video streams, in particular to a method and device for reversing video streams. Background technique [0002] At present, the video encoding format is mainly a video format file that is segmented, that is, a group of sequence frames, for inter-frame and intra-frame compression encoding, such as H264, H265, MPEG-4 and other formats. This type of video encoding frame is divided into various Types, such as I and P frames, where I frames appear periodically, and are bounded by I frames, and a GOP (Group of Pictures, Group of Pictures) is formed between two I frames. An I frame can be decoded correctly without reference to other frames, and a P frame must refer to the preceding I frame to be decoded correctly. [0003] When playing a video stream, there is a need to play it backwards in some scenarios. The current single video stream reverse playback scheme is: perform multiple parallel decodings on...

Claims

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Application Information

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IPC IPC(8): H04N19/42H04N19/426H04N19/44H04N19/177
CPCH04N19/177H04N19/42H04N19/426H04N19/44
Inventor 王军
Owner HANGZHOU HIKVISION DIGITAL TECH