I want make a
.gif animated picture from a given set of
I would prefer to do it from the command line, so command line tools would be very welcome.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.Sign up to join this community
You can use ImageMagick package. Install it using the command:
sudo apt-get install imagemagick
Now you can create a
gif from number of pictures(
convert -delay 20 -loop 0 *.jpg myimage.gif
To complete @Maythux answer:
In my case, I have 4608x3456 images and the generated gif was more than 300M for 32 images
convert -resize 20% -delay 20 -loop 0 *.jpg myimage.gif
convert -resize 768x576 -delay 20 -loop 0 *.jpg myimage.gif
*.jpg sucks a bit when dealing with numeric values, you may generate a gif with unsorted pics.
$ ls|cat 21-33-26_1.jpg 21-33-26_10.jpg // <--- this one 21-33-26_2.jpg 21-33-26_3.jpg 21-33-26_4.jpg 21-33-26_5.jpg 21-33-26_6.jpg 21-33-26_7.jpg 21-33-26_8.jpg 21-33-26_9.jpg 21-33-28_1.jpg // <--- should be here 21-33-28_2.jpg 21-33-28_3.jpg ...
As the shots were taken very quickly (10/s) they all have the same modification time and you can't trick using
ls -t for example. On ubuntu you can use
ls -v instead, something like:
convert -resize 768x576 -delay 20 -loop 0 `ls -v` myimage.gif
Sorting numerically is quite tricky on Mac OS X though, I guess you'll need to build a custom script.
ffmeg solution + test data
As of Ubuntu 18.10, ffpmeg 4.0.2-2, ImageMagick 6.9.10-8, I have found that ffmpeg is much faster than ImageMagick, and uses much less memory.
The simplest conversion command is:
ffmpeg \ -framerate 60 \ -pattern_type glob \ -i '*.png' \ -r 15 \ -vf scale=512:-1 \ out.gif \ ;
You can get my test data with:
wget -O opengl-rotating-triangle.zip https://github.com/cirosantilli/media/blob/master/opengl-rotating-triangle.zip?raw=true unzip opengl-rotating-triangle.zip cd opengl-rotating-triangle
The test data was generated with: https://stackoverflow.com/questions/3191978/how-to-use-glut-opengl-to-render-to-a-file/14324292#14324292 and contains 256 1024x1024 PNG images.
And here is another test data that you can generate directly in your browser right now! https://stackoverflow.com/questions/19235286/convert-html5-canvas-sequence-to-a-video-file/57153718#57153718
ffmpeg options I want to highlight are:
-pattern_type glob: convenient way to select images
-framerate 60: assume 60 FPS on input images, and output the same FPS.
ffmpeg cannot know otherwise, since there is no FPS data is in images as there is is in video formats.
The 256 input frames take about 4 seconds to finish.
-r 15: optional. Pick one every 4 images so reduce size (
4 == 60 / 15).
identify out.gif says that the GIF contains only 64 frames.
It still takes 4 seconds to play, so the delay is altered to make things match.
-vf scale=512:-1: optional. Set the width, scale height proportionally, usually to reduce size and save space.
ImageMagick vs ffmpeg benchmark
To get ImageMagick to work, I first had to modify its disk and memory limits at
/etc/ImageMagick-6/policy.xml as explained at: https://superuser.com/questions/1178666/imagemagick-convert-quits-after-some-pages
I compared the commands:
/usr/bin/time -v convert *.png -deconstruct -delay 1.6 out-convert.gif /usr/bin/time -v ffmpeg \ -framerate 60 \ -pattern_type glob \ -i '*.png' \ out-ffmpeg.gif \ ;
The commands were constructed to produce outputs that are as close as possible to make the comparison valid:
/usr/bin/time -v: used to find the maximum memory usage as explained at: https://stackoverflow.com/questions/774556/peak-memory-usage-of-a-linux-unix-process
-deconstruct: GIF images can contain just the minimal modified rectangle from the previous frame to make the GIF smaller.
ffmpeg calculates those diffs by default, but ImageMagick does not, unless
-deconstruct is used.
You will basically want to use that option every time with ImageMagick.
We can observe the difference with:
With the compressed version, all frames have smaller sizes than the initial one, e.g.:
out.gif GIF 1024x1024 1024x1024+0+0 8-bit sRGB 256c 16.7865MiB 0.010u 0:00.010 out.gif GIF 516x516 1024x1024+252+257 8-bit sRGB 256c 16.7865MiB 0.010u 0:00.010 out.gif GIF 515x520 1024x1024+248+257 8-bit sRGB 256c 16.7865MiB 0.010u 0:00.010
In this example, the second frame is only
516x516 instead of the full 1024x1024, and is placed at an offset of
252+257. It therefore contains just the middle triangle.
-delay: value that matches the 60FPS of
ffmpeg. Should not matter for conversion performance, but I don't want to risk it.
The output GIFs have about the same size and look visually identical.
We get for ImageMagick:
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:56.16 Maximum resident set size (kbytes): 2676856
and for ffmpeg:
Elapsed (wall clock) time (h:mm:ss or m:ss): 0:04.41 Maximum resident set size (kbytes): 97172
from which we see that:
Test hardware: Lenovo ThinkPad P51 laptop, Intel Core i7-7820HQ, 32GB(16+16) DDR4 2400MHz SODIMM, 512GB SSD PCIe TLC OPAL2.
You can easily do this with GIMP. First install it if it's not installed already with
sudo apt-get install gimp
From GIMP go to File -> Open as Layers to open all the png's on their own layer.
From here you can perform edits on the layers and, once done, go to File -> Export As. From the dialog be sure to set the file type to GIF.
From there you will go to the GIF export options. Tick the 'As Animation' option and set the parameters as required.
Modify the name of the layers, and include the delay in milliseconds between parenthesises, like this:
Click "Filters" menu, then "Animation", then "Animation Playback".
You can use a program called convert included in the imagemagick package. It is command line driven, but very easy to use. Install it either through the software center, or go to a command prompt and type
sudo apt-get install imagemagick
Now to create the .gif.
convert -delay 100 -size 100x100 xc:SkyBlue \ -page +5+10 balloon.gif -page +35+30 medical.gif \ -page +62+50 present.gif -page +10+55 shading.gif \ -loop 0 animation.gif
*Note the above example is straight from Image Magick Examples