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Method, device, embedded device, and storage medium for capturing pictures from video

A video and picture technology, applied in the field of image processing, can solve problems such as low efficiency

Active Publication Date: 2022-01-21
BEIJING AUTONAVI YUNMAP TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the screenshot scheme provided by the prior art has the problem of low efficiency, and it is urgent to provide a screenshot scheme capable of efficiently taking screenshots

Method used

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  • Method, device, embedded device, and storage medium for capturing pictures from video
  • Method, device, embedded device, and storage medium for capturing pictures from video
  • Method, device, embedded device, and storage medium for capturing pictures from video

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Embodiment Construction

[0031] As mentioned above, the current screenshot solution is to seek once every time a picture is captured, and the screenshot efficiency is low. For example, for a piece of video, the pictures to be intercepted are pictures corresponding to video frames I1, I2, I3, I4, I5, etc., assuming that I1 and I4 are key frames, when intercepting the picture corresponding to the third frame I3, it must traverse Video frames I1, I2, that is, re-seek video frame I1 and re-read I2; when intercepting the picture corresponding to the fourth frame I4, you must traverse video frames I1, I2, I3, that is, re-seek video frame I1 and re-read the video Frame I2, I3; when intercepting the picture corresponding to the fifth frame I5, it is necessary to traverse I1, I2, I3, and I4, that is, re-seek video frame I1 and re-read video frame I2, I3, I4... From the above, the above screenshot The solution has the problem of repeated seek key frames, and repeated seeks cause low efficiency in image capture....

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Abstract

A method, device, embedded device, and storage medium for intercepting pictures from a video, the method comprising: sorting the time points of the video frames of the pictures to be intercepted in ascending order; for other time points other than the first time point time point, determine whether the other time point is in the same key frame interval as the time point of the last captured picture; frame and the video frames corresponding to the other time points, decode the key frame and the video frames corresponding to the other time points, and obtain the pictures of the other time points; if not in the same key frame interval, find out which other time points belong to The key frame in the key frame interval, based on the key frame in the key frame interval and the video frame corresponding to the other time point, decodes the key frame and the video frame to obtain the picture at the other time point. The above solution can improve the screenshot efficiency.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image processing, and in particular to a method, device, embedded device, and storage medium for capturing a picture from a video. Background technique [0002] Video files take up a lot of space. When recording, in order to save storage space, compressing the video is called video encoding; otherwise, displaying the video is called video decoding. The process of decoding frames in a video and saving them as a picture is called screenshot. [0003] Because of the video encoding, the key frame of the video stores relatively complete information of the picture, and only the information of this frame is needed to complete the decoding. The other non-key frames store not complete picture information, but only difference information. Only the key frame and the video frame storing the difference information of the non-key frame can be decoded to obtain the complete picture corresponding t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/44H04N21/4402
CPCH04N21/44008H04N21/4402H04N21/440218
Inventor 程创博
Owner BEIJING AUTONAVI YUNMAP TECH CO LTD
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