How can I create a gif that plays only once?
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when creating an animated gif using imwrite, the result loops continuously no matter what I set LoopCount to be. I'm trying to get it to play only once, so I'm setting LoopCount to "0". Is this a bug?
回答(3 个)
Chad Greene
2018-12-19
Just type
gif('myfile.gif','LoopCount',1)
for the first frame
and then
gif
to write each subsequent frame. That's it.
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Aravindh Babu
2023-6-18
I use your function a lot, actually (and I really enjoy it, btw). But because of the way imwrite is set up, you still have to set 'LoopCount' to 0, not 1, to get it to loop once. I just tried setting 'LoopCount' to 1 and when I import the exported GIF into Photoshop, the actual loop count is 2.
Mark Sherstan
2018-12-19
Using the code found from here I can confirm that if I use 0 as the 'loopcount' argument it plays once and inf it keeps repeating. Passing the information from your script to the function something is being lost.
h = figure;
axis tight manual % this ensures that getframe() returns a consistent size
filename = 'testAnimated.gif';
for n = 1:0.5:5
% Draw plot for y = x.^n
x = 0:0.01:1;
y = x.^n;
plot(x,y)
drawnow
% Capture the plot as an image
frame = getframe(h);
im = frame2im(frame);
[imind,cm] = rgb2ind(im,256);
% Write to the GIF File
if n == 1
imwrite(imind,cm,filename,'gif', 'Loopcount',0);
else
imwrite(imind,cm,filename,'gif','WriteMode','append');
end
end
So I modified the above and got the following script and function which is very close to yours. Again something must just be getting lost between your function and elsewhere but hopefully this helps:
Script:
h = figure;
axis tight manual
filename = 'testinf.gif';
for n = 1:0.5:5
x = 0:0.01:1;
y = x.^n;
plot(x,y)
drawnow
make_gif(h, n, filename)
end
Function:
function make_gif(fig, ovwrt, filename)
frame = getframe(fig);
im = frame2im(frame);
[imind,cm] = rgb2ind(im,256);
if ovwrt == 1
imwrite(imind,cm,filename,'gif', 'Loopcount',0);
else
imwrite(imind,cm,filename,'gif','WriteMode','append');
end
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