ImageMagick and transparent background for animated gif

Question

I have an animation as a batch of .png files (100 files). The background is transparent in the source .png files. I want to convert them into a single animated gif. I have tried this command:

convert -delay 0 -loop 0 -alpha set *.png ani.gif

But the result is the following (green is the HTML page background):

enter image description here

How should I remove the previous frames from an every following one?

noober · Accepted Answer · 2013-02-03T20:33:36.193

61

I've found -dispose previous.

UPDATE

OK, convert -delay 0 -loop 0 -alpha set -dispose previous *.png ani.gif

edited Feb 03 '13 at 20:33

answered Feb 03 '13 at 19:14

noober

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If you still face transparency issue you should set `-dispose background` . More info: https://superuser.com/questions/555490/transparency-issues-when-converting-pngs-to-gif – Olivier D'Ancona Mar 06 '22 at 14:15

score 21 · Answer 2 · answered Apr 25 '14 at 06:10

21

The solution is here:

http://www.alecjacobson.com/weblog/?p=2601

The magic keyword seems to be “dispose” and calling the following fixed the problem:

convert -dispose 2 screencapture-*.tga screencapture.gif

answered Apr 25 '14 at 06:10

Cristian Velandia

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Using `-dispose previous` almost worked, with the first image never going away. I found that using `-dispose 2` worked. – Steven C. Howell Aug 19 '16 at 19:08

ImageMagick and transparent background for animated gif

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