Sometimes, you end up with a folder full of images, which you want to animate. With the open source ImageMagick tool, this is easy on the command line:
This will show you all of the PNG files in the folder in quick succession, like a flip book.
ImageMagick works on just about any OS. For Linux users, the package is generally imagemagick or ImageMagick:
sudo apt-get install imagemagick
yum install ImageMagick
But this blog post is about animated GIFs, so lets make one of those. This is a compact way to combine images (here and here for examples in context), gives you a re-usable at-a-glance illustration of something that changes over time.
Example from an older post:
The steps to make a good conversion command are:
- Check that alphabetically, your images are in order. If not, rename them:
- Convert them to a GIF a few times, and find the delay that suits you (hundredths of a second between frames)
convert -delay 80 *.png animated.gif
- Choose an output size (width x height):
convert -resize 415x -delay 80 *.png animated.gif
- Compress with -Layers Optimize for a smaller file:
convert -resize 415x -delay 80 *.png -layers Optimize animated.gif
- Generated thumbnails usually take the first frame only, which is why we ask Imagemagick to resize it (WordPress users: Choose “Full Size”).
- To pause at the start of the loop for a moment, just copy the first image a few times.