Create a Gource visualization of the Rails codebase as it crosses into GitHub land...

make_video.sh

# On a Mac
#   brew install gource  (http://code.google.com/p/gource/)
#   brew install ffmpeg
#   git clone https://github.com/rails/rails.git

# In the rails code directory, run this to see the same visualization
gource --hide bloom,files,filenames,dirnames --auto-skip-seconds 0.3 --seconds-per-day 0.003 --date-format "%B %Y" --start-position 0.2 --stop-position 0.45 --file-idle-time 10 --stop-at-end -1024x768

# Or do this to save it to a reusable video:
gource --hide bloom,files,filenames,dirnames --auto-skip-seconds 0.3 --seconds-per-day 0.003 --date-format "%B %Y" --start-position 0.2 --stop-position 0.45 --file-idle-time 10 --stop-at-end -1024x768 -o - | ffmpeg -y -b 3000K -r 60 -f image2pipe -vcodec ppm -i - -vcodec libx264 -vpre slow -threads 0 rails-on-github.mp4