The output GIFs have about the same size and look visually identical. Should not matter for conversion performance, but I don't want to risk it. delay: value that matches the 60FPS of ffmpeg. See also: how can I resize an animated GIF file using ImageMagick? It therefore contains just the middle triangle.
#Turn pictures to gif full#
In this example, the second frame is only 516x516 instead of the full 1024x1024, and is placed at an offset of 252+257. We can observe the difference with: identify out.gif You will basically want to use that option every time with ImageMagick.
deconstruct: GIF images can contain just the minimal modified rectangle from the previous frame to make the GIF smaller.įfmpeg calculates those diffs by default, but ImageMagick does not, unless -deconstruct is used. usr/bin/time -v: used to find the maximum memory usage as explained at: The commands were constructed to produce outputs that are as close as possible to make the comparison valid: I compared the commands: /usr/bin/time -v convert *.png -deconstruct -delay 1.6 out-convert.gif To get ImageMagick to work, I first had to modify its disk and memory limits at /etc/ImageMagick-6/policy.xml as explained at:
#Turn pictures to gif how to#
GIF from video: How to create an animated GIF from MP4 video via command line?.Set the width, scale height proportionally, usually to reduce size and save space. It still takes 4 seconds to play, so the delay is altered to make things match. With it, identify out.gif says that the GIF contains only 64 frames. Pick one every 4 images so reduce size ( 4 = 60 / 15). The 256 input frames take about 4 seconds to finish. framerate 60: assume 60 FPS on input images, and output the same FPS.įfmpeg cannot know otherwise, since there is no FPS data is in images as there is is in video formats. pattern_type glob: convenient way to select images The important ffmpeg options I want to highlight are:
The test data was generated with: and contains 256 1024x1024 PNG images.Īnd here is another test data that you can generate directly in your browser right now! You can get my test data with: wget -O opengl-rotating-triangle.zip The simplest conversion command is: ffmpeg \
#Turn pictures to gif mac os x#
Sorting numerically is quite tricky on Mac OS X though, I guess you'll need to build a custom script.Īs 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. On ubuntu you can use ls -v instead, something like: convert -resize 768x576 -delay 20 -loop 0 `ls -v` myimage.gif $ ls|catĪs 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. *.jpg sucks a bit when dealing with numeric values, you may generate a gif with unsorted pics. Or convert -resize 768x576 -delay 20 -loop 0 *.jpg myimage.gif 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 To complete answer: To avoid generating a very large file, you can use -resize option:
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