Get figures and use them to build a video.avi

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Davide Magnelli 2018-2-26

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https://ww2.mathworks.cn/matlabcentral/answers/384848-get-figures-and-use-them-to-build-a-video-avi

回答： Leostar90 2022-3-31

采纳的回答： KSSV

在 MATLAB Online 中打开

Hello, I have developed an algorithm that shows at every iteration a figure as follow:

   figure
      imshow(processo(:,:,1,i))
      hold on 
      plot(X,Y,'o')
      plot(X0,Y0,'o')
      plot(X1,Y1,'o')
      plot(X2,Y2,'o')
      plot(X3,Y3,'o')
  end

What I need is to save in an array each figure (i.e. imshow with each plot) and build an .avi video from them. Any suggestions?

Thanks in advance, Davide

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采纳的回答

KSSV 2018-2-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/384848-get-figures-and-use-them-to-build-a-video-avi#answer_307112

在 MATLAB Online 中打开

    for i = 1:N
    figure(1)  
    imshow(processo(:,:,1,i))
      hold on
      plot(X,Y,'o')
      plot(X0,Y0,'o')
      plot(X1,Y1,'o')
      plot(X2,Y2,'o')
      plot(X3,Y3,'o')
      hold off
      F(i) = getframe(gcf) ;
      drawnow
    end
  % create the video writer with 1 fps
  writerObj = VideoWriter('myVideo.avi');
  writerObj.FrameRate = 10;
  % set the seconds per image
% open the video writer
open(writerObj);
% write the frames to the video
for i=1:length(F)
    % convert the image to a frame
    frame = F(i) ;    
    writeVideo(writerObj, frame);
end
% close the writer object
close(writerObj);