How to solve two axes in failure VideoWriter?

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Wang Benliang 2020-1-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501944-how-to-solve-two-axes-in-failure-videowriter

评论： Wang Benliang 2020-2-27

for example, my code framework as follows:

t=0:.1:2*pi;
plot(t,sin(t),'k');
axes('position',[0.55,0.55,0.3,0.3]);
plot(t,sin(t), 'b');

there is two axes in one figure.

so when i use VideoWriter to export file.avi,the video is broken.

i think the proble maybe because of the axes(when i comment "axes('position',[0.55,0.55,0.3,0.3]);",all success!)

my question is how to export mp4/avi videos when the frame has two axes like the kind of above code?

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Ganesh Regoti 2020-1-31

Hi Can you share the exact code? I don't think the issue is with axes. I have tried with another example and it worked.

Refer to the following link,

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

Here is the code with tweak

for i = 1:10
    figure(1)  
%     imshow(processo(:,:,1,i))
      hold on
      plot(0+i,0+i,'o')
      plot(1+i,i+i,'o')
      plot(2+i,2+i,'o')
      axes('position',[0.55,0.55,0.3,0.3]);
      plot(3+i,3+i,'o')
      plot(4+i,4+i,'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);

Wang Benliang 2020-2-27

it works! thank you! Problem happens when i use two axes handle in one loop to export video, I solve it by export figures first, and combined it into video. Thank you again, your code also give me some idea!

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