Markus Völter
voelter@acm.org
www.voelter.de
Podcasting
101
Markus Völter
Independent
Coach, Consultant,
Trainer, Developer…
… for software architecture,
model-driven development,
middleware
… and podcasting 
Why do I a talk about
Podcasting?
Founder and Editor of
ft
so ft ware
engineering
radio
se-radio.net
software engineering radio
Team
Alexander Schmid
Arno Haase
Bernd Kolb
Eberhard Wolff
Michael Kircher
Markus Voelter
software engineering radio
Example Topics
Software Architecture
Error Handling
Concurrency
Remoting
Ruby
Patterns
…
software engineering radio
Example Interviews
Eric Evans
Doug Schmidt
Michael Stal
Gregor Kiczales
Frank Buschmann
…
software engineering radio
Since January 2006
Every 10 days
www.se-radio.net
About
Podcasts
Podcasting
Democratizing Radio
The Long Tail
if you have worldwide distribution,
even the smallest niche topic will find
a sizable audience
Podcasting?
Podcasting is the concept of downloading various
forms of longer-form online audio programs in the
form of digital audio files you can listen to at any time
you choose.
Podcasting does not refer to the downloading of
individual MP3s or songs, but it does refer to the
download of program-oriented online audio such as a
talk show or a hosted music program.
Usually the distribution happen by an automated
download using a suitable RSS/Podcast client.
Podcasting?
iPod + Broadcasting
Podcasting!
Podcasting =
Broadcasting via the iPod
MP3‘s distributed via RSS
RSS:
Really
Simple
Syndication
RSS: An XML file
<?xml version="1.0"?>
<rss version="2.0">
<channel>
<title>oAW News</title>
<link>http://eclipse.org/gmt/oaw/</link>
<description>oAW News</description>
<item>
<title>oAW 4.1 RC2 available</title>
<link>http://www.eclipse.org/gmt/oaw/download</link>
<description>
Here's some text...
</description>
<pubDate>15 July 2006</pubDate>
</item>
<item>
<title>oAW 4.1 RC1 available</title>
<link>http://www.eclipse.org/gmt/oaw/download</link>
<description>
RC1 of openArchitectureWare
4.1 is now available for download.
</description>
<pubDate>29 June 2006</pubDate>
</item>
</channel>
</rss>
RSS:
An XML file
that can pulled
by an RSS reader
RSS:
You can subscribe
to the RSS feed
RSS:
Automatic updates!
Feels like a „push“ model.
Podcast == RSS Feed?
Well, not quite.
RSS == Text only (Blog)
RSS == Text only (Blog)
Podcast == RSS +
MP3 Enclosures
MP3 Enclosures?
References (URLs)
to MP3 files somewhere.
MP3 Enclosures
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:cc="http://web.resource.org/cc/"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" >
<channel>
<title>Software Engineering Radio</title>
<link>http://se-radio.net</link>
<description>Information for Software Developers and Architects</description>
<language>en</language>
<copyright>(c) 2006 The team of se-radio.net</copyright>
<item>
<title>Episode 23: Architecture Pt. 1</title>
<link>http://se-radio.net/index.php?post_id=105211#</link>
<description>Bla Bla </description>
<category>regular/technology</category>
<pubDate>Sat, 15 Jul 2006 17:12:00 GMT</pubDate>
<guid isPermaLink="true">http://se-radio.net/index.php?post_id=105211#</guid>
<enclosure
url="http://media.libsyn.com/media/seradio/episode23-architecture_pt1.mp3"
length="40837760" type="audio/mpeg"/>
</item>
<item>
...
</item>
</channel>
</rss>
History
October 2000:
Tristan Louis, Dave Winer,
Adam Curry
en.wikipedia.org/wiki/History_of_podcasting
History
October 2000:
„audioblogging“
en.wikipedia.org/wiki/History_of_podcasting
History
February 2004:
"podcasting"
suggested by Ben Hammersley
en.wikipedia.org/wiki/History_of_podcasting
History
September 2004:
ipodder-dev list
Adam Curry
en.wikipedia.org/wiki/History_of_podcasting
History
February 2005:
Carl Franklin
first podcast production
company, Pwop Productions
en.wikipedia.org/wiki/History_of_podcasting
Just a Niche?
6.6% of US adults have recently downloaded a podcast
this is 9.2 million web users
Nielsen (as of July, 2006)
Just a Niche?
Really popular podcasts have
500.000
downloads per episode
(This Week in Tech)
Just a Niche?
Consuming
Podcasts
Podcast Client:
Podcatcher
Directory at:
http://www.podcastingnews.com
ITunes
Finding Podcasts:
Podcast Directories
Podcast Pickle, Odeo, Yahoo
Podcasts, Apple iTunes
Tool Chain
Web Server
RSS Feed w/
Enclosures
Podcatcher
(Podcast Client)
Manual Transfer
MP3
Player
Harddisk
Tool Chain
Web Server
RSS Feed w/
Enclosures
ITunes
Automatic
Synchronization
iPod
Topics?
A very subjective selection…
Science
Nature Podcast
nature.com/nature/podcast
Science
This Week in Science
twis.org
Science
Scientific American Podcast
www.sciam.com/podcast/
Science
Science Friday
sciencefriday.com/
Technology
PRI‘s The World
www.theworld.org/technology/
Technology
This Week in Tech (TWiT)
twit.tv
Technology/Space
The Space Show
(new space)
thespaceshow.com
Technology/BioTech
Futures in Biotech (FIB)
www.twit.tv/FIB
IT/Software
Software
Engineering
Radio
ft
so ft ware
engineering
radio
se-radio.net
se-radio.net
IT/Software
Security Now!
grc.com/securitynow
IT/Software
JavaPosse
javaposse.com
IT/Software
IT Conversations
itconversations.com
IT/Software
FLOSS Weekly
(Open Source)
www.twit.tv/FLOSS
IT/Software
Tonabnehmer (Agile SWD)
www.frankwestphal.de/Tonabnehmer
Entrepreneurship
Venture Voice
venturevoice.com
Entrepreneurship
Entrepreneurial Thought
Leaders
edcorner.stanford.edu/podcasts.shtml
Creativity
TED Talks
Ideas Worth Spreading
ted.com
Music
The Rogue‘s
Gallery
(Prog Rock)
www.thedividingline.com/rg
Music
The Tartan Podcast
(New Scottish Music)
www.tartanpodcast.com/
Music
Marillion Online Podcast
marillion.com
<Insert your topic here>
… and you‘ll find something.
somewhere.com
Producing
Podcasts
Topic
Whatever you want!
Define you target audience.
Keep it focused.
Recording
Microphone
Sony F-V220
Windows
Linux
Direct
Recording
Mac
Recording
Recording
Remote
Recording
Skype
+PowerGramo
Recording
Advanced
(i.e. more expensive)
M-Audio
Microtrack 24/96
2 channel
digital recorder
Recording
Mic2
Guest
Mic1
Advanced
Direct
Me
Head
phone
Line
in
Line
in
Microtrack
Line
out
USB
MP3, 320 bps
Notebook
Recording
Mic2
Me
Advanced
Remote
Line in
Mic1
Line
out
Head
phone
Skype
Notebook
Line
in
Line
in
Microtrack
Line
out
USB
MP3, 320 bps
Guest
Post Production Cutting
Multiple Tracks
Fade in/out
Denoiseing
Normalizing
Levelling
Hosting
Blogging Engine
w/ Enclosure Support
Hosting
Storage
a minute of 128bps MP3 is about 1 MB file size
45 minutes per week  ca. 200 MB per month
each month!
After a year: ca. 2.5 GB
Hosting
Bandwidth
50 MB per week downloaded 5000 times
250 GB per week or
1 TB per month
Hosting
$$$$$$ ?
Hosting
or others…
libsyn.com
Hosting
Blogging Engine
w/Enclosures
Unlimited Bandwidth
additional 250 MB
storage each month
… acceptable download speed
… acceptable availability
$10 per month!
libsyn.com
Searching / Finding
Google will find you
Searching / Finding
Google will find you
Register with
Directories
Searching / Finding
Cross-Advertise in Podcasts
Create a 20 second promo/
jingle for your podcast
Searching / Finding
Use Podzinger Full-Text
Audio Search!
Licensing
You have to define
a license for your
podcast.
Licensing
Do not try to come up
with your own license!
Licensing
Creative
Commons
Creative Commons is a nonprofit
organization that offers flexible copyright licenses for creative works.
creativecommons.org
Licensing
Example
License
There is also a
„lawyer-speak“
bullet-proof text for
this license.
(the one used for SE Radio)
creativecommons.org
Licensing
Add the License
to the podcast page
Music
Dangerous!
Copyright issues!
License Fees (GEMA)
Don‘t use Music !
or…
use CC music
(there‘s a library of music
licensed with CC at the site)
creativecommons.org
Don‘t use Music !
or…
get permission
from independent (!) artists
Don‘t use Music !
or…
music.podshow.com
Fair Use
... a doctrine in United States copyright law that allows limited use
of copyrighted material without requiring permission from the
rights holders, such as use for scholarship or review.
Similar principles are usually available in other jurisdictions.
Warning:
A delicate Area
Fair Use
Go to
en.wikipedia.org/wiki/Fair_use
for details
More about
Podcasts
Tricks of the Podcasting Masters
Podcasting Pocket Guide
Podcasting: Do It Yourself Guide
The Business Podcasting Bible
Secrets of Podcasting
Podcasting Now!
Podcasting For Dummies
Absolute Beginner's Guide to Podcasting
Podcasting 101
Podcasting Hacks
Several Books
I recommend
this one:
Geohegan, Klass
Podcast Solutions
Friends Of Ed,
August 2005,
ISBN 1590595548
Podcast Academy Conference
pa.gigavox.com
Podcast Expo Conference
portablemediaexpo.com
Link Collection
portablemediaexpo.com/podcastexpert
Legal Stuff
wiki.creativecommons.org/Podcasting_Legal_Guide
Markus Völter
voelter@acm.org
www.voelter.de
Podcasting
101
The End.
Thanks!