speed control of exporting animations in mlx

There's a little button of 'export animation' on the bottom right of each animation made in mlx. Though 'playback speed' can be adjusted when viewing the animation in mlx, can this playback speed be also inherited into the exported animation file through 'export animation' or else?

Answer 1

[Manikanta Aditya]

Hi,

When exporting animations in MATLAB Live Scripts (mlx), the playback speed you set within the mlx environment does not automatically carry over to the exported animation file. The exported animation will play at a default speed, and looks like there isn’t a direct option to inherit the playback speed setting from the mlx environment.

However, you can control the playback speed of the exported animation by manually adjusting the frame rate during the export process. For example, if you’re exporting to an animated GIF, you can use the imwrite function to set the frame rate.

Refer to the following documentations:

• Animation Playback Controls in Live Scripts (R2021a) » File Exchange Pick of the Week - MATLAB & Simulink
• New in MATLAB R2022a: export graphics to animated GIFs

I hope this helps.

[feynman feynman]

thanks but is there any solution that works for exported animations with 'drawnow'?

[Manikanta Aditya]

I think you can control the playback speed of exported animations that use drawnow by adjusting the timing within the loop.

You can try to refer to the following example script:

% Create an animated line
h = animatedline;
axis([0 4*pi -1 1]);

% Generate data
x = linspace(0, 4*pi, 1000);
y = sin(x);

% Create a GIF file
filename = 'myAnimation.gif';

% Loop through the data points
for k = 1:length(x)
    addpoints(h, x(k), y(k));
    drawnow;
    
    % Capture the plot as an image
    frame = getframe(gcf);
    im = frame2im(frame);
    [imind, cm] = rgb2ind(im, 256);
    
    % Write to the GIF file
    if k == 1
        imwrite(imind, cm, filename, 'gif', 'Loopcount', inf, 'DelayTime', 0.05); % Adjust 'DelayTime' for playback speed
    else
        imwrite(imind, cm, filename, 'gif', 'WriteMode', 'append', 'DelayTime', 0.05);
    end
end

[feynman feynman]

thanks however, 0.05 doesn't seem to affect the speed?

[Manikanta Aditya]

If 0.05 doesn’t seem to make a difference, you might want to try experimenting with different values. For instance, try setting DelayTime to a smaller value like 0.01 for faster playback or a larger value like 0.1 for slower playback.

[feynman feynman]

i tried many values, including 0.1, 0.01, none of them makes a difference