Overlaying an image on multiple images

[Demian]

ImageMagick 6.7.4-2
Windows 7
Windows command-line

I'm really new to ImageMagick but I managed to extract all frames from a GIF animation. Now I would like to overlay a gif image on top of all of these frames. I know how to compile the frames back to GIF. I can overlay individual images but not all of them at once. The frames are named f_#.gif and the overlay is overlay.gif and it is the same size as the frames. I have a bit over 200 frames.

I tried this but it only wrote one "anim_0.gif" and it was full black.

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composite -gravity center overlay.gif f_*.gif anim_%d.gif

This code correctly writes one image with the overlay but I don't know how I would do all of them at once.

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composite -gravity center overlay.gif f_0.gif anim_%d.gif

Although scaling multiple images with this code works fine.

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convert -scale 50% f_*.gif scaled_%d.gif

[glennrp]

I would try the "mogrify" application with the "-draw image over ..." optoon
(first copy all of the GIF images into a new working directory and
run "mogrify" there, because the input images will be overwritten with the
watermarked ones).

[Demian]

I can't figure out how it mogrify works. Where is the input image? This is as far as I got but it gives error not to mention there is no input image.

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mogrify -draw 'image Over 0,0 0,0 "overlay.gif"' anim_%d.gif

[fmw42]

see http://www.imagemagick.org/Usage/basics/#mogrify

[Bonzo]

Try this

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convert animation.gif -coalesce -gravity South -geometry +0+0 null: watermark.png -layers composite -layers optimize watermarked_animation.gif

Refresh this page to see the example again.

[Demian]

Try this

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convert animation.gif -coalesce -gravity South -geometry +0+0 null: watermark.png -layers composite -layers optimize watermarked_animation.gif

Oh my. That worked. Thanks!

Any idea how to make individual frames longer in a gif? For example frame 1 would be 2 seconds long, frames 2-100 4ms and frame 101 10 seconds?

[anthony]

You can also use -layers composite to overlay one image over a large number of images already in memory.

EG:
convert logo: granite: null: rose: -geometry +10+10 -layers composite images_%d.png

This overlays the rose image onto two images.

See IM Examples...
http://www.imagemagick.org/Usage/anim_mods/#composite
and specifically the next section on the operators special handling when only one image is provided in one of the two image lists (separated by the special "null:" marker image)