All you need to generate timelapse video of a github project development activity like : http://www.youtube.com/watch?v=nY1j3O4nWDI&hd=1

01_requirements.sh

brew install gource
brew install ffmpeg

02_gource_avatar.pl

#!/usr/bin/perl
#fetch Gravatars

use strict;
use warnings;

use LWP::Simple;
use Digest::MD5 qw(md5_hex);

my $size       = 90;
my $output_dir = '.git/avatar';

die("no .git/ directory found in current path\n") unless -d '.git';

mkdir($output_dir) unless -d $output_dir;

open(GITLOG, q/git log --pretty=format:"%ae|%an" |/) or die("failed to read git-log: $!\n");

my %processed_authors;

while(<GITLOG>) {
    chomp;
    my($email, $author) = split(/\|/, $_);

    next if $processed_authors{$author}++;

    my $author_image_file = $output_dir . '/' . $author . '.png';

    #skip images we have
    next if -e $author_image_file;

    #try and fetch image

    my $grav_url = "http://www.gravatar.com/avatar/".md5_hex(lc $email)."?d=404&size=".$size; 

    warn "fetching image for '$author' $email ($grav_url)...\n";

    my $rc = getstore($grav_url, $author_image_file);

    sleep(1);

    if($rc != 200) {
        unlink($author_image_file);
        next;
    }
}

close GITLOG;

03_build.sh

cd symfony
../gource_avatar.pl .
git log --pretty=format:user:%aN%n%ct --reverse --raw --encoding=UTF-8 --no-renames --no-merges --after=2013-03-31 > avril.log
gource --disable-bloom --logo logo.png --font-colour FFFFFF --disable-progress --hide filenames --user-image-dir .git/avatar/ --auto-skip-seconds 1 --background 000000 -1280x720 --stop-at-end -o gource.ppm avril.log
ffmpeg -y -r 60 -f image2pipe -vcodec ppm -i gource.ppm -vcodec libx264 -preset ultrafast -pix_fmt yuv420p -crf 1 -threads 0 -bf 0 gource.mp4