Problem creating video mp4 from animation.

Question

jakaria babar 2020-2-14

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505462-problem-creating-video-mp4-from-animation

评论： jakaria babar 2020-2-14

What's wrong with this code? Can you help me please?

%% Creating Video mp4 from Animation of a graph a point P(x,y) which is variable connected to three fixed point A(6,9),B(20,38),C(49,25).
clc
clear 
close all
M=5000;
x=6:1:49;  % x domain
y=9:1:38;  % y domain
for i=1:length(x)
    for j=1:length(y)
        clf
        L=sqrt((x(i)-6)^2+(y(j)-9)^2)+sqrt((x(i)-20)^2+(y(j)-38)^2)+sqrt((x(i)-49)^2+(y(j)-25)^2);
        if L<M
            M=L;
            a=x(i);
            b=y(j);
            p = [6 20 49];   % x coordinates of three fixed points A, B, and C.
            q = [9 38 25];   % y coordinates of three fixed points A, B, and C.
            hold on;
            grid on
            title('Steiner minimal tree')
            for n = 1:length(p)
                plot([p(n) a],[q(n) b],'color',[0 0 1]);
                myChar = char(64+n);
                text(p(n)+1,q(n),myChar);
            end
            plot(p,q,'o','markerfacecolor','k','markeredgecolor','none', ...
                'markersize',4);
            plot(a,b,'o','markerfacecolor','r','markeredgecolor','none', ...
                'markersize',8);
            text(a+0.5,b+0.75,'P');
            drawnow;
            pause = .01;
            F(i,j)= getframe(gcf);
        end
    end
end
mywriter = videowriter('Steiner minimal tree','MPEG-4');
mywriter.framerate = 60;
open(mywriter);
writevideo(mywriter,F);
close(mywriter);

Whwn I run this file command window shows

Cannot find an exact (case-sensitive) match for 'videowriter'
The closest match is: VideoWriter in F:\Matlab Alx\toolbox\matlab\audiovideo\@VideoWriter\VideoWriter.m
Error in animate_figure (line 37)
mywriter = videowriter('Steiner minimal tree','MPEG-4');

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Answer 1

Bhaskar R 2020-2-14

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505462-problem-creating-video-mp4-from-animation#answer_415547

在 MATLAB Online 中打开

VideoWriter % correct one you have give videowriter(not case sensitive)

3 个评论
显示 1更早的评论隐藏 1更早的评论

Bhaskar R 2020-2-14

在 MATLAB Online 中打开

This works for you

%% Creating Video mp4 from Animation of a graph a point P(x,y) which is variable connected to three fixed point A(6,9),B(20,38),C(49,25).
clc
clear 
close all
M=5000;
x=6:1:49;  % x domain
y=9:1:38;  % y domain
mywriter = VideoWriter('Steiner minimal tree','MPEG-4');
% mywriter.framerate = 60;
mywriter.FrameRate = 60;
open(mywriter);
for i=1:length(x)
    for j=1:length(y)
        clf
        L=sqrt((x(i)-6)^2+(y(j)-9)^2)+sqrt((x(i)-20)^2+(y(j)-38)^2)+sqrt((x(i)-49)^2+(y(j)-25)^2);
        if L<M
            M=L;
            a=x(i);
            b=y(j);
            p = [6 20 49];   % x coordinates of three fixed points A, B, and C.
            q = [9 38 25];   % y coordinates of three fixed points A, B, and C.
            hold on;
            grid on
            title('Steiner minimal tree')
            for n = 1:length(p)
                plot([p(n) a],[q(n) b],'color',[0 0 1]);
                myChar = char(64+n);
                text(p(n)+1,q(n),myChar);
            end
            plot(p,q,'o','markerfacecolor','k','markeredgecolor','none', ...
                'markersize',4);
            plot(a,b,'o','markerfacecolor','r','markeredgecolor','none', ...
                'markersize',8);
            text(a+0.5,b+0.75,'P');
            drawnow;
            pause = .01;
%             F(i,j)= getframe(gcf);
            writeVideo(mywriter,getframe(gcf));
        end
    end
end
% mywriter = videowriter('Steiner minimal tree','MPEG-4');
% writevideo(mywriter,F);
close(mywriter);