Recent notes

9 months ago

OS X Screencast to animated GIF


To capture the video, using the free "QuickTime Player" application:

  • Open "Quicktime Player",
  • Go to File -> New Screen Recording
  • Selected screen portion by dragging a rectangle, recorded 13 second video.
  • Go to File -> Export -> As Movie
    • Saved the video in full quality with the filename in.mov
To convert in.mov into out.gif, open Terminal to the folder with in.mov and run the following command:

ffmpeg -i in.mov -s 600x400 -pix_fmt rgb24 -r 10 -f gif - | gifsicle --optimize=3 --delay=3 > out.gif


Notes on the arguments:

  • -r 10 tells ffmpeg to reduce the frame rate from 25 fps to 10
  • -s 600x400 tells ffmpeg the max-width and max-height
  • --delay=3 tells gifsicle to delay 30ms between each gif
  • --optimize=3 requests that gifsicle use the slowest/most file-size optimization

Installation
The conversion process requires the following command-line tools:

  • ffmpeg to process the video file
  • gifsicle to create and optimize the an animated gif
If you use homebrew and homebrew-cask software packages, just type this in:

brew install ffmpeg 
brew cask install x-quartz #dependency for gif...