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Editorial Team
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Asked: 2026-05-26T03:03:49+00:00

I wrote a script to add watermark to images on my site. Everything works

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I wrote a script to add watermark to images on my site. Everything works ok for png/jpg, but gif images must be treaten by more complicated way. My script:

convert -splice x36 -gravity south -background white image.gif \
-coalesce -gravity SouthEast -geometry +0+0 -background white \
null: watermark-text.png -layers composite new-image.gif

For 95 percent of gif it works fine. But there are some examples, that brings errors.
Concern this image:
image

Normal cat. Only first frame contains background (viewed layers in gimp).

enter image description here

This is not normal cat. Any suggestions?

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1 Answer

  1. Editorial Team

    The problem is that your -splice is being applied relative to the gif’s frames’ layout rather than the complete image’s layout. Do the -coalesce first (order matters):

    convert -coalesce -splice x36 -gravity south -background white image.gif \
-gravity SouthEast -geometry +0+0 -background white \
null: watermark-text.png -layers composite new-image.gif

    See “Simple Modifications of Animations” from the Examples of ImageMagick Usage for more information.

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