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Podcasting for developers

How to plan, record, mix, and host your first podcast

Benoit Marchal (bmarchal@pineapplesoft.com), Consultant, Pineapplesoft
Benoît Marchal is a consultant and writer based in Namur, Belgium. He is the author of XML by Example, Applied XML Solutions, and XML and the Enterprise. He produces the Declencheur podcast on photography.

Summary:  Many articles and books on podcasting assume that you have experience with sound recording, you can recognize XLR cables, and you understand decibels. Consequently, they spend a lot of time discussing the computer-specific aspects, such as MP3 encoding and hosting Really Simple Syndication (RSS) files, and comparatively little on the audio aspects. If you search on audio, you find plenty of articles on audio recording for musicians and home studio. Some of that material is useful but, again, the tendency is to assume that computers are the difficult bit. What makes this tutorial unique is that it is written by a developer, for developers. So it assumes that you can handle the developer's tasks (such as writing the RSS feed) and concentrates on the novelty: the use of audio.

Date:  27 Jun 2006
Level:  Introductory PDF:  A4 and Letter (103 KB | 26 pages)Get Adobe® Reader®

Activity:  12516 views
Comments:  

Hosting considerations

Do you need a Web site?

Is a podcast a Web site? It is clear that podcasting uses HTTP hosting so it needs a Web server. Strictly speaking, though, you don't need an HTML site to podcast. Assuming they find you through a podcast directory and subscribe directly with a podcasting client to your RSS feed, listeners might never see your site.

Server setup

Still it's a good idea to provide a Web site, if only to offer a description of the podcast and instructions to subscribe. Many podcasters also offer an option to listen to the podcast and to collect comments on their site.

Many podcasters maintain a blog as a companion to their podcast. Indeed, with their support for RSS, comments, and archiving, blogs are the most natural platform to support a podcast.

Using a blog, you do not need to write the RSS feed manually. Another option is to use an RSS editor or blogging software to manage your feed.

If you're not using a blog, or if you set up a new server, make sure you configure the content type correctly. The official content type for RSS feed is application/rss+xml, but it is not well supported by browsers. Until browsers improve, serve RSS feeds as text/xml.

Bandwidth and longevity

Podcasts consume more than their share of bandwidth, so plan to grow the hosting from the start. Some hosts have specialized in podcasting and offer good deals for podcasters.

You do not need to host your MP3 file on the same machine as the RSS feed. You can even host the MP3 files on several machines! There is no restriction on the enclosure element in RSS. It can point to any host.

Some podcasters take advantage of this to publish their MP3 under a creative commons license and benefit from the Internet Archive's free hosting of creative commons files. Others use several free hosting accounts to share the load. Hosting everything on a solid Web server remains the most reliable solution.

Regardless of where you decide to host your podcast, publish the URL under a domain name that you own. This is not e-mail. The feed is the entry point to your podcast. Lose it and you'll lose subscribers. So don't take any chances -- make sure you control the URL to your podcast.

You do not have to pay hosting fees to use a domain name. Most registrars offer free redirection and every serious podcasting client honors the 302 redirection, meaning you can publish your feed under your domain and redirect to a free or cheap hosting site.

I cannot stress enough the importance of owning the domain for your feed. Since I joined podcasting forums, it seems almost every week, I hear from a podcaster who has lost a large chunk of his/her audience, is discouraged, and quit. In every single instance, the problem would never have occurred had they owned the domain name.

As a podcaster, you consume a lot of bandwidth and, if the podcast is successful, your needs grow. It is not uncommon for a podcaster to be kicked out of a host because the bandwidth consumption is too high or to want to change hosts to save money or improve hosting. When that happens, unless you control the domain for your feed, you lose subscribers.


Example

I chose to host Declencheur with the same reliable host I have been using (for other projects) since the end of last century. Still, I registered a domain name (as discussed above, the availability of a domain was one of my criteria for the name), not only to retain control over the feed, but because I wanted a memorable address.

I edit the RSS feed with an RSS editor. I have written a simple PHP script to generate a Web site from the RSS feed. Comments are managed and stored in a database. I chose a custom PHP script primarily because I had the code base already. XSLT would have been an alternative.


Much success

If you made it this far, congratulations. Podcasting is still new so the field is wide open with possibilities. I wish you much success with your project.

Special Thanks

Special thanks to Sebastien Stomarcq for taking the time walk me through recording options when I launched my podcast

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