Tag: Open Source

Gitify Your Life

Git was written to manage code, but Richard Hartmann presents a whole range of projects and tools that use Git for all sorts of things. 😀

From tracking personal notes to managing your website, wiki, and blog over tracking system and personal configuration files to managing videos, photos and other large files and making system backups, a lot of tools have been grown around the git ecosystem to help you support most tasks of your digital life. This talk will show you a lot of neat tools and tricks and it’s highly likely that you will adopt at least one of the various solutions.

http://youtu.be/Ln1Ri8kLzok

Watch it on YouTube or get it from the Debian Archives.

Scalable Icons for the Social Web

If you are looking to add icons for social networks and web services to your site there are quite a lot to find on the internet. But almost all of them have shortcomings if you go beyond the Facebook, Twitter, Google+ triple. Email, GitHub, App.net? … but if you also want scalable icons you can just give up right now. Well, almost 😉 … while searching the internet I came across two projects that fulfill all the above criteria. 😀

Mono Social Icons Font gives you a ton of icons in a font file. It has three variants for each if the icons (rounded, circle and no background). They are monochrome by nature, but they can be colored as text on a website can be.

Adam Fairhead’s Webicons Set has a huge set of colored SVG icons (with PNG fallbacks). It even has some fairly rare ones … I even added one for KDE. 😉

I put them to use on my new greeter and my updated contact page.

Convert any file VLC can play to mp3

I just felt the need for a script that could extract the audio track of a video, transcode it and save it as an mp3 file … 2 hours later I was finished (get the Gist). 😀 It uses VLC to do hard work. 😉

Thanks to Kris Hom for the inspiration. 🙂

#!/usr/bin/env ruby -rubygems
#
# Author: Riyad Preukschas <riyad@informatik.uni-bremen.de>
# License: Mozilla Public License 2.0
#
# Transcode any file ffmpeg can play to mp3.
require 'optparse'
require 'shellwords'
#
# helpers
#
def puts_error(message)
puts "Error: #{message}"
end
def puts_warning(message)
puts "Warning: #{message}"
end
#
# parse options
#
options = {
:bit_rate => 192,
}
begin
OptionParser.new do |opts|
opts.banner = "Usage: convert2mp3 [options] FILE [<FILE ...>]"
opts.separator ""
opts.separator "Conversion Options:"
opts.on("-f", "--[no-]force", "Overwrite mp3 file if it exists already") do |f|
options[:force_overwrite] = f
end
opts.on("-o", "--output-directoy [DIRECTORY]", "Save converted files to this directory") do |out_dir|
unless File.directory?(out_dir)
puts_error %Q(Wrong output directory. "#{out_dir}" is not a directory.)
exit 1
end
options[:output_dir] = out_dir
end
opts.separator ""
opts.separator "mp3 Options:"
opts.on("-b", "--bit-rate [RATE]", Integer, "Bit rate in kbit/s (default: #{options[:bit_rate]})") do |b|
options[:bit_rate] = b
end
opts.separator ""
opts.separator "General Options:"
opts.on_tail("-h", "--help", "Show this message") do
puts opts
exit 0
end
opts.on_tail("-v", "--[no-]verbose", "Be more verbose") do |v|
options[:verbose] = v
end
end.parse!
rescue OptionParser::InvalidOption => e
puts_error e.message
exit 1
end
#
# gather source files
#
if ARGV.empty?
puts_error "No files given."
exit 1
end
source_files = []
while !ARGV.empty?
source_path = ARGV.shift
unless File.exists?(source_path)
puts_warning %Q(Skipping "#{source_path}". It doesn't exist.)
next
end
unless File.file?(source_path)
puts_warning %Q(Skipping "#{source_path}". It's not a file.)
next
end
source_files << source_path
end
#
# ffmpeg command line options
#
FFMPEG = 'ffmpeg'
TRANSCODING = '-vn -ab BIT_RATEk -vbr on -f mp3'.
gsub('BIT_RATE', options[:bit_rate].to_s)
VERBOSITY = options[:verbose] ? '-v info' : '-v quiet'
if `which #{FFMPEG} > /dev/null` && $? != 0
puts_error "Couldn't find ffmpeg."
exit 1
end
source_files.each do |source_file|
source_dir = File.dirname(source_file)
output_dir = options[:output_dir] || source_dir
output_file = File.join(output_dir, "#{File.basename(source_file, ".*")}.mp3")
if File.exist?(output_file)
if options[:force_overwrite]
puts_warning %Q(Output file exists. "#{output_file}" will be overwritten.) if options[:verbose]
else
puts_warning %Q(Output file exists already. Skipping "#{output_file}".)
next
end
end
puts %Q(Converting "#{source_file}")
unless system("#{FFMPEG} #{VERBOSITY} -y -i #{source_file.shellescape} #{TRANSCODING} #{output_file.shellescape}")
puts_error "Conversion failed. Try using the -v option for more detailed output."
end
puts if options[:verbose]
end
view raw ffmpeg-mp3-converter.rb hosted with ❤ by GitHub
#!/usr/bin/env ruby -rubygems
#
# Author: Riyad Preukschas <riyad@informatik.uni-bremen.de>
# License: Mozilla Public License 2.0
#
# Transcode any file VLC can play to mp3.
require 'optparse'
require 'mkmf'
require 'shellwords'
#
# helpers
#
def puts_error(message)
puts "Error: #{message}"
end
def puts_warning(message)
puts "Warning: #{message}"
end
#
# parse options
#
options = {
:bit_rate => 192,
:sampling_rate => 44100,
}
begin
OptionParser.new do |opts|
opts.banner = "Usage: convert2mp3 [options] FILE [<FILE ...>]"
opts.separator ""
opts.separator "Conversion Options:"
opts.on("-f", "--[no-]force", "Overwrite mp3 file if it exists already") do |f|
options[:force_overwrite] = f
end
opts.on("-o", "--output-directoy [DIRECTORY]", "Save converted files to this directory") do |out_dir|
unless File.directory?(out_dir)
puts_error %Q(Wrong output directory. "#{out_dir}" is not a directory.)
exit 1
end
options[:output_dir] = out_dir
end
opts.separator ""
opts.separator "mp3 Options:"
opts.on("-b", "--bit-rate [RATE]", Integer, "Bit rate in kbit/s (default: #{options[:bit_rate]})") do |b|
options[:bit_rate] = b
end
opts.on("-s", "--sampling-rate [RATE]", Integer, "Sampling rate in Hz (default: #{options[:sampling_rate]})") do |s|
options[:sampling_rate] = s
end
opts.separator ""
opts.separator "General Options:"
opts.on_tail("-h", "--help", "Show this message") do
puts opts
exit 0
end
opts.on_tail("-v", "--[no-]verbose", "Be more verbose") do |v|
options[:verbose] = v
end
end.parse!
rescue OptionParser::InvalidOption => e
puts_error e.message
exit 1
end
#
# gather source files
#
if ARGV.empty?
puts_error "No files given."
exit 1
end
source_files = []
while !ARGV.empty?
source_path = ARGV.shift
unless File.exists?(source_path)
puts_warning %Q(Skipping "#{source_path}". It doesn't exist.)
next
end
unless File.file?(source_path)
puts_warning %Q(Skipping "#{source_path}". It's not a file.)
next
end
source_files << source_path
end
#
# VLC command line options
#
# using find_executable() will create a mkmf.log file :(
vlc_paths = [
'vlc',
'/Applications/VLC.app/Contents/MacOS/VLC',
File.expand_path('~/Applications/VLC.app/Contents/MacOS/VLC'),
]
VLC = vlc_paths.find { |path| find_executable0(path) }
INTERFACE = '-I dummy'
PLAYBACK = '--no-loop --no-repeat --play-and-exit'
TRANSCODING = '--sout="#transcode{vcodec=dummy,acodec=mp3,ab=BIT_RATE,channels=2,samplerate=SAMPLING_RATE}:standard{access=file,mux=raw,dst=\'DESTINATION\'}"'.
gsub('BIT_RATE', options[:bit_rate].to_s).
gsub('SAMPLING_RATE', options[:sampling_rate].to_s)
VERBOSITY = options[:verbose] ? '' : '-q 2>/dev/null 1>/dev/null'
if VLC.nil?
puts_error "Couldn't find VLC."
exit 1
end
source_files.each do |source_file|
source_dir = File.dirname(source_file)
output_dir = options[:output_dir] || source_dir
output_file = File.join(output_dir, "#{File.basename(source_file, ".*")}.mp3")
if File.exist?(output_file)
if options[:force_overwrite]
puts_warning %Q(Output file exists. "#{output_file}" will be overwritten.) if options[:verbose]
else
puts_warning %Q(Output file exists already. Skipping "#{output_file}".)
next
end
end
puts %Q(Converting "#{source_file}")
unless system("#{VLC} #{PLAYBACK} #{INTERFACE} #{TRANSCODING.gsub('DESTINATION', output_file.gsub(/'/, ""))} #{source_file.shellescape} #{VERBOSITY}")
puts_error "Conversion failed. Try using the -v option for more detailed output."
end
puts if options[:verbose]
end
view raw vlc-mp3-converter.rb hosted with ❤ by GitHub

Update 2014-03-01:

  • Check whether VLC is installed
  • Should also work on Linux now
  • Increase default bit rate to 192kbit/s
  • Fixed bug where the file/playlist would repeat endlessly

Update 2014-11-05:

  • Also look for VLC in “~/Application/”

Update 2016-03-05

Joomla! Wold Conference 2012 Keynote: Changing the world with Open Source

Pascal Finette gave a great keynote at Joomla! World Conference 2012 talking about how Mozilla came to be and what they learned along the way. He shares insights on how to build a competitive product, a healthy community and maybe even a business around it, but developing and governing it the open source way.