CODEWITHSUNDEEP
imageimagemagick
Adam Ranganathan
Adam Ranganathan

Reputation: 1717

How to add an image to all frames of a GIF using Imagemagick?

I would like to create a lightning effect for a photo using a lightning stock image and a personal photo. For example using the following lightning image:

enter image description here

I would like to put the panda below in all frames of the gif using Imagemagick:

enter image description here

I tried extracting all the frames using the command:

convert -coalesce lightning.gif out%05d.pgm

But I am stuck at how to do a batch composite operation for all frames. Would anyone know how to achieve this? I was hoping that there would be a single line solution using Imagemagick.

Upvotes: 1

Views: 1140

Answers (1)

Mark Setchell
Mark Setchell

Reputation: 207660

You are on the right track with -coalesce to separate the frames, I think the key ingredient in putting them back together is the MIFF (Magick Image File Format) which can be used to stream multiple images.

So, here I stream all the individual, composited frames from inside a for loop into the final convert outside the loop to put them all back together:

convert lightning.gif -coalesce frames-%03d.gif

for f in frame*gif; do
   convert $f -gravity south \( panda.jpg -resize 50% \) \
      -compose colordodge -composite miff:-
done | convert -delay 80 miff:-  anim.gif

enter image description here

The selection of a decent blending mode is another issue!

As a one-liner, that looks like this:

for f in frame*gif; do convert $f -gravity south \( panda.jpg -resize 50% \) -compose colordodge -composite miff:- ; done | convert -delay 80 miff:-  anim.gif

Upvotes: 1

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