Gource visualisation

avatars.pl

#!/usr/bin/perl
#fetch Gravatars

# From http://code.google.com/p/gource/wiki/GravatarExample

use strict;
use warnings;

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

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

system("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;

sub fetch
{
    #try and fetch image
    my ($name, $email, $author_image_file) = @_;
    my $grav_url = "http://www.gravatar.com/avatar/".md5_hex(lc $email)."?d=404&s=".$size;

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

    my $rc = getstore($grav_url, $author_image_file);
    if($rc != 200) {
        unlink($author_image_file);
    }
}

my $pool = Thread::Pool::Simple->new(min => 10, max => 20, do => [\&fetch]);

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;

    $pool->add(($author, $email, $author_image_file));
}
$pool->join();

close GITLOG;

gource.bash

#!/usr/bin/env bash

# To overlay an audio track on the resulting video use the following ffmpeg
# command.
#
#   ffmpeg -i gource.x264.mp4 -i music.mp3 -shortest dotfiles.mp4

if [[ ! -d ".git/avatar" ]]; then
  echo "Avatar directory .git/avatar missing. Have you run gource.bash?"
  exit -1
fi

gource -1280x720 \
       --user-image-dir .git/avatar \
       --stop-position 1.0 \
       --bloom-intensity 0.18 \
       --user-image-dir .git/avatar \
       --highlight-all-users \
       --output-framerate 60 \
       --multi-sampling \
       -1280x720 \
       -a 0.3 \
       --date-format %Y-%m-%d \
       --disable-progress \
       --seconds-per-day 0.05 \
       --output-ppm-stream - \
       | ffmpeg -y -b 10000K -r 60 -f image2pipe -vcodec ppm -i - -vcodec libx264 -threads 0 -bf 0 gource.x264.mp4