來自matrix matlab的視頻

Question

我在文本文件中有矩陣[3] [120]，我想從中生成視頻。我該如何解決這個問題？

到目前爲止，我已經完成了以下工作：我已經從文本文件中讀取數據並將其存儲在一個變量中。從這裏我想生成矩陣表示的視頻。或者是否有辦法將矩陣分成多個幀，因爲我想將視頻分割爲多個幀，然後再次合併這些幀以恢復視頻。然後我會將原始視頻與當前視頻進行比較

clear all 
clc 
filename='filename.txt'; 
delimiterIn=' '; 
K=importdata(filename,delimiterIn); 

從這裏我該怎麼做？

Answer 1

您沒有提供有關您想製作的電影的足夠信息。製作電影的步驟在此page上突出顯示。關鍵是在循環內調用getframe來生成電影。我正在修改matlab的例子到你的工作中：

clear all 
    clc 
    filename='filename.txt'; 
    delimiterIn=' '; 
    K=importdata(filename,delimiterIn); 
    % K =load(filename) may also work 
    nFrames = 20; 

    % Preallocate movie structure. 
    mov(1:nFrames) = struct('cdata', [],... 
        'colormap', []); 

    % Create movie. 
    plot(K(:,1), K(:,2)); % assumes you are plotting the first two colums 
    axis tight manual 
    set(gca,'nextplot','replacechildren'); 
    for k = 1:nFrames 
     plot(K(:,1), K(:,2)); % assumes you are plotting the first two columns 
           % the data must somehow change inside this loop 
     mov(k) = getframe(gcf); 
    end 

    % Create AVI file. 
    movie2avi(mov, 'mydata.avi', 'compression', 'None'); 

另一個接口是videowriter接口，它存在於更新版本的matlab中。 這是解釋here。並建議比上述步驟。請按照那裏的建議。該頁面很容易遵循。

clear all 
    clc 
    filename='filename.txt'; 
    delimiterIn=' '; 
    K=importdata(filename,delimiterIn); 
    % K =load(filename) may also work 


    %Prepare the new file. 

    writerObj = VideoWriter('movie.avi'); 
    open(writerObj); 
    % Create movie. 
    plot(K(:,1), K(:,2)); % assumes you are plotting the first two colums 
    axis tight manual 

    set(gca,'nextplot','replacechildren'); 
    set(gcf,'Renderer','zbuffer'); % optional I think 

    for k = 1:nFrames 
     plot(K(:,1), K(:,2)); % assumes you are plotting the first two columns 
           % the data must somehow change inside this loop 
     frame = getframe(gcf); 
     writeVideo(writerObj,frame); 
    end 
    close(writerObj);