convert video to frames and then delete some frames???

Question

Ankur Singh 2014-3-3

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/119943-convert-video-to-frames-and-then-delete-some-frames

回答： John Rogers 2019-7-10

i have a video,i need to divide video into different frames..and then delete some of the frames below some threshold??please help me

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Answer 1

John Rogers 2019-7-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/119943-convert-video-to-frames-and-then-delete-some-frames#answer_382726

在 MATLAB Online 中打开

Here is an example:

% speedUpVideo
% Keeps one out of ten frames
clear;clc
videoIn = VideoReader('hangar_free_air.mp4');
videoOut = VideoWriter('hangar_free_airFAST.mp4','MPEG-4');
open(videoOut);
frameNum = 0;
while hasFrame(videoIn)
    videoFrame = readFrame(videoIn);
    frameNum = frameNum+1;
        if frameNum == 10    
        writeVideo(videoOut,videoFrame);
        frameNum = 0;
    end
end
close(videoOut)